Category Archives: fish

THE RACE: GG X – “I Came for the Waters”

No apologies for the Casablanca reference!

Members of Gulf of Guinea X, our third marine expedition, have recently returned from scuba-sampling the inshore waters of Príncipe. The expedition was led by Dr. Luiz Rocha, chair of our Ichthyology Department and his colleague, Dr. Sergio Floeter, of the University of Santa Catarina, Brazil. The group consisted of seven divers including a São Tomean graduate student, Hugulay Maia; the team operated out of Roça Belo Monte, courtesy of Africa’s Eden, and used the dive boat of Makaira Lodge with our old friend Bobby Bronkhorst as skipper.

Luiz team

GG X team: (above, l to r) L. Fontoura,, R. Morais, Dr. Luz Rocha (leader), J. Gasparini, Dr. Cadu, H. Maia, Dr. S. Floeter. (below) Hugulay Maia earned SCUBA certification on this research trip.

The marine component is particularly important to our understanding of the scope of the biodiversity of the Gulf of Guinea Islands. Readers will recall that Príncipe is geologically the oldest island of the archipelago, originally rising from the ocean floor in the Oligocene, some 31 million years ago.

margins
The early margins of the island (above),  now weathered to 100m below sea level, are very old habitats. We can expect this region to have unique (endemic) species because as we know that species in isolation change over time; evolution occurs in marine habitats just as it does in terrestrial environments. Most of the specimens and tissues are yet to be analyzed but there are some early exciting discoveries:

Clepticus africanus endemic
Clepticus africanus,  an endemic damselfish known only from the  Gulf of Guinea Islands, from Sao Tome to Annobon.

Corcyrogobius lubbocki type series only
Lubbock’s goby, Corcyrogobius lubbocki: These are the second living specimens encountered in Principe since the species was orginally described in 1988. Previously, the species was known only from Ghana, and Annobon, the southernmost island in the archipelago.

Sparisoma choati also on P type Neds dock Sparisoma choati, Tomio’s parrotfish.

In the October 2011 blog I reported that a new species of parrotfish (above) was being described from a specimen caught on rod and reel by Dr. Tomio Iwamoto (CAS) from the pier of our friend Ned Seligman, in São Tomé during GG II (below). It is not everyday that a new species is caught from an old friend’s dock!!  The GG X team just collected the first Príncipe specimens since then (above) and as you can see, they are quite different in coloration from the original specimen from the big island.

Sao Tome, 2008

Type locality of Tomio’s parrotfish, Ned Seligman’s dock, Praia Francesa, Sao Tome.

While in the field, Dr. Rocha wrote:

“We are surprised to see such clear signs of overfishing in an island with only ~7,000 inhabitants. We saw no sharks, and the few large fish were very scared, a tell tale of spearfishing.
Part of Hugulay and Renato’s work is to interview local fishermen and try to get more clues of how bad overfishing is here. And their interviews reveal a problem that was even bigger than we thought: there are reports of dynamite fishing!”

https://www.calacademy.org/blogs/gulf-of-guinea-expeditions/where-are-the-fishes-0

In earlier blogs, I have included quite a few images of large fish caught just offshore on Príncipe over the years (below),  so Dr. Rocha’s observations are disturbing.

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Twenty kg+  barracuda, caught off Praia Lemba-Lemba, Principe in 2001.

The dynamite or blast fishing issue is an especially critical one, as underwater habitat can be permanently destroyed as a result. The activity was originally brought to the attention of local authorities some years ago; nevertheless, most of the local inhabitants in the fishing industry know about it according to the team, and indications are that it continues in spite of government efforts.
Príncipe was named a UNESCO World Biosphere Reserve in 2013, and I am proud to add that the scientific results of our multidisciplinary expeditions played a positive role in the island’s recognition as a unique place on the globe.  Apart from the obvious long-term economic and environmental consequences of continued blast fishing, Príncipe’s World Biosphere status could make this activity extremely visible internationally and embarrassing. As of 2007, 403 inshore fish species have been listed for this tiny 10002 km island. Unchecked and unstudied over fishing in these idyllic tropical waters will disastrously degrade the incredible biodiversity levels of this ancient island.

island biology

 This summer my colleagues Martim Melo, Ricardo Lima, Luis Ceríaco and I are all attending the international conference on island biology which is being held the University of the Azores. We are organizing a special symposium on the Gulf of Guinea Islands, and Dr. Lima is leading an afternoon sub-session on conservation. He is the author of a recent article (below) on habitat loss in São Tomé and Príncipe and hopefully the session will lead to a discussion of major ecological issues such as this and blast fishing.

http://www.econotimes.com/Deforestation-an-alert-from-the-islands-of-S%C3%A3o-Tom%C3%A9-and-Pr%C3%ADncipe-180253

Our work has enjoyed the support of the government since Gulf of Guinea I in 2001; one of our good friends, Jose Cassandra, is Regional President of Príncipe.

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Office of Hon. Jose Cassandra (left) with Dr. Maria Jeronimo and myself. A. Stanbridge phot. (GG IX)

Prior to a workshop on green economy by UNESCO, the people of Santo Antonio had a general clean-up of the town. Below are two photos of President “Toze,” helping clean up the Rio Papagaio (Parrot River) that runs through town. Suffice to say, he is a charismatic leader and a good friend.

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Another blog will be forthcoming soon as we prepare for the conference and GG XI in the Fall. It is also time to formulate our primary school education efforts for the coming season.

The parting shot:

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One of our third grade classes! We will visit them and nearly 2000 other primary schoolers during GG XI when they are in the fourth grade.  A. Stanbridge phot. GG IX

PARTNERS:
The research expeditions and the primary school education program are supported by tax-deductable donations to the “California Academy of Sciences Gulf of Guinea Fund”* We are grateful for ongoing governmental support, especially to Arlindo de Ceita Carvalho, Director General, Victor Bomfim, and Salvador Sousa Pontes of the Ministry of Environment, Republic of São Tomé and Príncipe for their continuing authorization to collect and export specimens for study, and to Ned Seligman, Roberta dos Santos and Quintino Quade of STePUP of Sao Tome http://www.stepup.st/, our “home away from home”. GG VIII and upcoming GG XI have been funded by a generous grant from The William K. Bowes Jr. Foundation, and substantial donations from Mrs. W.H.V.“D.A.” Brooke, Thomas B. Livermore, Rod C. M. Hall, Timothy M. Muller, Prof. and Mrs. Evan C. Evans, Mr. and Mrs. John L. Sullivan Jr., Clarence G. Donahue, Mr. and Mrs. John Sears, and a heartening number of “Coolies”, and members of the Docent Council of the California Academy of Sciences. Once again we are deeply grateful for the support of the Omali Lodge (São Tomé) and Roça Belo Monte (Príncipe) for both logistics and lodging and for partially sponsoring our education efforts for GG VII and GG VIII.

*California Academy of Sciences
55 Music Concourse Dr.
San Francisco, CA 94118
USA

The Race: Island Biologists in Training

Jens Vindum, Senior Collections Manager, Department of Herpetology. (phot D. Lin-GG I)

I need to add and addendum to last month’s blog, “Why We collect Specimens.” Our Senior Collections Manager, Jens Vindum (GG I, GG II) has just informed me that since 2003, there have been 33 international scientific papers published on our Gulf of Guinea reptile and amphibian specimens and/or tissue samples from them!

Clearly, the scientific world is beginning to hear about Sâo Tomé and Príncipe! At this point, I do not know how much of our material from other disciplines has been used but certainly our samples are in labs all over the world.

We have been extremely fortunate to have been able to bring a series of our graduate students with us on a number of our expeditions.  Not only have most flourished academically and many have published on their island projects, they represent a cadre of new young scientists who have an understanding of the uniqueness of the islands and the people who live on them.  All have interacted closely with local island citizens and as a result, function as young biology ambassadors for these fabulous islands.  Overall, the islands are still very poorly known to the outside world, but we are getting there!  Here are our young colleagues:


Lindsay Wilson on Bioko Island with bush viper.  RCD phot – 1998

Lindsay Wilson was a participant on our 1998 expedition to Bioko, the first island in the Gulf of Guinea chain. She completed her MSc on African treefrogs of the genus Hyperolius at San Francisco State University with highest honors.


Joel Ledford on Sao Tome.  D. Lin phot- GG I

Joel Ledford joined Gulf of Guinea I as the graduate student of Dr. Charles Griswold. He completed his MSc at San Francisco State and then his PhD in spider systematics at the University of California, Berkeley.


D. Lin phot – GG I

Also on GG I was Ricka Stoelting, my graduate student. She completed her MSC on the endemic caecilian of Sao Tome (she is holding one, above) and is currently a PhD candidate at the University of Wisconsin.  She is also working on the publication of her MSc work at San Francisco State (SFSU).


B. Van Syoc photo – GG III

Dana Carrison-Stone was a participant of the marine expedition, GG III as the graduate student of Dr. Bob Van Syoc.  Dana discovered two new species of barnacles from the islands and they are part of her MSc which she completed last year at SFSU.


D. Lin phot – GG II

Josef Uyeda was on GG II and again GG on III as an undergraduate at Willamette University and one of my Summer Systematics interns.  During his island work, he discovered and described a new species of frog from Sâo Tomé. As I write, he is defending his doctoral thesis (tomorrow!) at Oregon State University. Flash!! Josef finished his PhD today! (Oct 5)

 

                                                                                                             unknown phot.

Mac Campbell, also a Willamette undergrad, joined GG II as an assistant to our ichthyologist, Dr. Tomio Iwamoto.  He has since completed his MSc at University of Alaska, Fairbanks and is currently a PhD candidate in fish systematic at the same institution.


Weckerphoto – GG III

Rebecca Wenk joined GG III as the grad student of Dr. Tom Daniel one of our senior botanists.  Rebecca’s work resulted in her successful completion of her MSc at SFSU and also an excellent scientific publication on plants of the family Acanthaceae.  Tragically, Rebecca died of a serious illness last year.


A. Stanbridge phot – GG IV

Miko Nadel is a graduate student at San Francisco State, studying under Dr. Dennis Desjardin, the mycologist on GG II and GG III). Miko was a participant on GG VI doing the first comprehensive survey of lichens on the island.

A. Stanbridge phot. GG VI

Rayna Bell also joined us on GG VI, studying color variation in African treefrogs. Rayna is a PhD candidate at Cornell University.

The people above were or still are graduate students who have actually worked on the islands with us.  But they are not the only young academics studying our Gulf of Guinea Island material.  Here at the California Academy of Sciences we have a program known as the Summer Systematics Institute (SSI). This program is funded by the National Science Foundation, and undergraduate students can apply to work on scientific projects for the summer under the mentorship of a CAS faculty member. Here are those that have worked on Gulf of Guinea specimens. I have not included students who started as undergrad SSI interns and later became our grad students (Lindsay Wilson, Josef Uyeda and Ricka Stoelting).


unknown phot

Katie Marshall was an Occidental College undergrad and my SSI intern in 2006.  Katie studied the genetics of the Oceanic treefrog, Hyperolius molleri, the only Gulf of Guinea endemic frog that occurs on both islands.  Katie is currently a PhD candidate at the University of Washington, studying the genomics of marine bacteria.

RCD phot.

Lisette Arellano was an undergrad at the University of California, Santa Barbara when she joined us as my SSI intern in 2009. Lisette examined the morphology and genetics of cobra jita snakes (Lamprophis), long thought to be the same species on Sâo Tomé and Príncipe.  Lisette showed that in fact the two island populations are genetically quite different, also recognizable by color pattern as distinct.  Although we know each island is a different species, we have been unable to publish new names because the relationships of the same group on mainland Africa are still very unclear. Lisette is currently a PhD candidate in Biology at the University of Colorado.


RCD phot – 2010

One of the last vertebrates one would predict to be native to an oceanic island is a shrew, largely due to physiological constraints. During the SSI summer of 2010, Eden Maloney’s DNA work showed that the Sâo Tomé shrew, Crocidura thomensis, did arrive on the island naturally, probably many thousands of years ago and is a true endemic species. Its nearest relative is a different species found in eastern South Africa.  Eden has just graduated from the University of California, Los Angeles and is applying to graduate schools.  We are working on publishing her work.

unkown phot.

Lizzie Miller of the University of California, San Diego was my most recent SSI intern (2010). Lizzie has graduated and is now in graduate school at UCSD studying fish systematics.  Readers will already know from this blog that Lizzie discovered and described a new species of gecko from Príncipe, Hemidactylus principensis.

Lauren in Nigeria. D Blackburn phot – 2012.

Lauren Scheinberg is also a grad student at San Francisco State University. Although never an SSI intern nor has she been with us to the islands, she was my lab assistant on a long-term physiology project and now works as a curatorial assistant in our department.  She has become involved in a rather complicated taxonomic problem with the island skinks of the genus Afroablepharis. Like Lisette’s snakes, we know from the work of colleagues in Madeira and Portugal that the skinks are different species on Sâo Tomé and Príncipe.  Unfortunately, material we loaned them that formed part of the basis of this hypothesis was somehow lost in transit.  Lauren has analyzed our remaining material but collating the information generated by different labs can be extremely difficult.  But we are working on it.

Plans are already afoot for GG VII next year.

Here’s the parting shot:

Joy on the way to Rolas, Sao Tome.. B. Simison phot. – GG VI

PARTNERS
We gratefully acknowledge the support of the G. Lindsay Field Research Fund, Hagey Research Venture Fund of the California Academy of Sciences, (GG I, II), the Société de Conservation et Développement (SCD) and Africa’s Eden for logistics, ground transportation and lodging (GG III-V), STePUP of Sao Tome http://www.stepup.st/, Arlindo de Ceita Carvalho, Director General, and Victor Bomfim, and Salvador Sousa Pontes of the Ministry of Environment, Republic of São Tomé and Príncipe for permission to collect and export specimens for study. Special thanks for the generosity of private individuals who made the GG III-V expeditions possible: George G. Breed, Gerry F. Ohrstrom, Timothy M. Muller, Mrs. W. H. V. Brooke, Mr. and Mrs. Michael Murakami, Hon. Richard C. Livermore, Prof. & Mrs. Evan C. Evans III, Mr. and Mrs. Robert M. Taylor, Velma and Michael Schnoll, and Sheila Farr Nielsen; GG VI supporters include HBD of Bom Bom and the Omali Lodge for logistics and lodging, The Herbst Foundation, The “Blackhawk Gang,” the Docent Council of the California Academy of Sciences in honor of Kathleen Lilienthal, Bernard S. Schulte, Corinne W. Abell, Prof. & Mrs. Evan C. Evans III, John and Judy Sears, John S. Livermore and Elton Welke.
Our expeditions can be supported by tax-deductable donations to  “California Academy of Sciences Gulf of Guinea Fund”

The Race: Sixth Gulf of Guinea Expedition Redux

dashs-patch1

All of the GG VI participants are home now, and our specimens and materials are safely ensconced in their respective departments at the Academy.  For the first time, we had an official patch for the expedition. The original design of the cobra bobo and giant Begonia was drawn by one my graduate students, Dashiell Harwood. The patch was produced by our friend, Mike Murakami, who played such an important role in the production of the biodiversity coloring books (more about the education project below.) We gave many of these stick-on patches to third grade teachers to hand out as incentives to hard-working students.

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Dr. Iwamoto consuming his favorite, the concon. (A. Stanbridge – GG VI

Soon after Dr. Tomio Iwamoto, our marine ichthyologist and veteran of GGI and GG II returned home to the Academy a few weeks before the last of us, he left for Africa again. And, once again, he is aboard the Norwegian research vessel, the R.V. Nansen, as a senior scientist. I devoted an entire blog to his last trip aboard the Nansen, a couple of years ago.  They are trawling for deep water fish off the coast of Guinea Conakry. I believe the ship will also be exploring the coast of Mauritania in the following weeks. Since he left before we returned we have not been able to discuss his findings during GG VI; but below is a photo of the strange pipefish he and and Dr. Brian Simison seined in northern S?o Tomé

pipefish-bs
Microphis, the only member of its family reported from S?o Tomé and Príncipe. (B. Simison-GG VI)

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Our botanists had a “a field day,” so to speak.  Recall that Jim Shevock (right) made 682 collections during GG IV, and this time he figured he would just pick up a few things he missed.  Not so. He estimates that among the 647 collections he made in GG VI are between 50 to 100 species of bryophytes he had not seen before, and these include at least 12 genera of liverworts and 12 genera of mosses that are new to the islands.
Miko Nadel (left, above) really has his hands full trying to sort out the lichens; there are 129 previously known species, but Miko made 475 collections, many of which will undoubtedly be new.  He tells me that lichenologists classify lichens by the supporting fungus rather than the symbiotic algae.

as-mesa

Pico Mesa,  Príncipe ( RCD –  GG III)

In an earlier blog from the islands, I reported that Jim, Miko and our photographer Andrew were the first CAS workersto study the top of Pico do S?o Tomé. Later on Príncipe, Jim and Miko became the first of us to reach the top of Pico Mesa (above).  Because they had to walk there rather than reaching the base by boat, they were only able to explore the northern most reaches of it; it appears to be a botanist’s paradise, and we will definitely return. Dr. Tom Daniel (GG III and IV) is particularly interested in getting up there as Miko photographed an endemic Impatiens at the top.

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Gabriel, me, Rayna Bell and Joao Pedro Pio at Bom Sucesso (A. Stanbridge – GGVI)

The herpetologists also did well. Rayna and I were assisted by a young Portuguese biologist, Joao Pedro Pio (far right), currently working on the endangered endemic maroon pigeon for workers at the University of Lisbon. He and his co-workers (including Gabriel, left) accompanied Rayna on all of her nocturnal frog hunts.

 

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Above is Hyperolius molleri, the oceanic treefrog typically inhabiting the lower elevations of both islands. This particular frog is being devoured by a wolf spider and note that it is largely a uniform green in color. In many earlier blogs, I have included images of the S?o Tomé giant treefrog which is much bigger, has bright orange and black markings and is typically found above 1100 meters.

 

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Rayna’s sample from between 700 and 900 meters would strongly suggest that the two species are hybridizing at this level.  This is pretty exciting in that, if supported by genetic analysis, it will fit right into her PhD thesis at Cornell University.

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While I failed to find adult specimens of the Príncipe shrew which we know to be endemic and distinct from the S?o Tomé shrew, we did find the largest “cobra gita” (house snake: Lamprophis sp.) we have ever seen and from a new locality.  This, too, we know to be a distinct species from the S?o Tomé Lamprophis, but we have thus far been unable to describe it. This is because there are many species of the same genus on the African mainland, and their relationships are poorly understood. So while we know the two island species are distinct from one another, we cannot guarantee that one or the other (or both) does not also occur on the mainland.

h-principensis
The Príncipe thumbnail-less gecko H. principensis (Weckerphoto – GG III]

While we were on Príncipe I received word that the description our new species of gecko had been formally published, so above meet Hemidactylus principensis.  Like H. greeffi, its nearest relative on S?o Tomé, it lacks the thumbnail on the first toe, but otherwise, the two are very, very different.

Dr. Brian Simison’s finding that there are no limpets on either S?o Tomé or Príncipe is intriguing.  Brian informs me that so far as he knows, S?o Tomé and Príncipe may be the only oceanic islands that lack them.  They are present on the Cape Verde Ids, the Seychelles, etc.

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Dr Brian Simison at Laguna Azul.  (A. Stanbridge – GG VI)

This leads to the possibility that there may be something in the volcanic rock making up these islands that precludes the presence of these mollusks.

guinea-line
Recall from earlier blogs that all four of the Gulf of Guinea Islands, plus Mt. Cameroon, the Cameroon highlands and even the Jos Plateau of Nigeria all originated from magmatic extrusions up through a 3,000 km-long linear fissure or rift that transects both the marine and continental parts of the African plate known as the Guinea Line; extrusion of magma occurred at various times from over 60 million years ago to the very recent Holocene continental island of Bioko.

The remarkable towers of both S?o Tomé and Príncipe which appear in these blogs with such frequency are indeed of a rather uncommon, chemically distinct rock known as phonolite, usually associated with geologic hotspots.

phonolye-and-mesa
Príncipe, note phonolite towers and mesa on lower left. (A. Stanbridge – GG VI)

One test of the hypothesis that it is something about the rock that is excluding limpets would be to explore the shoreline of Bioko, the youngest of the Gulf of Guinea Ids and the only continental member of the archipelago.  And as luck would have it, our colleague, Rayna Bell will be working on Bioko in a matter of months.  In addition to looking for limpets on Bioko t the presence or absences of limpets along the Gulf of Guinea coast should be documented. If indeed the rock is unsuitable for limpets Brian would predict that limpets would be found on either side of Guinea Line, but not on rocks produced by it.

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(l-r, Roberta Ayres,  Velma Schnoll, me on, S?o Tomé (A.  Stanbridge – GG VI)

I devoted an entire blog last month to the biodiversity education component of GG VI, and for all of us involved, this was just joyous. We personally delivered 1,840 endemic species coloring books to third graders in 62 classrooms of 17 selected primary schools on both islands. On the big island the schools were in the districts of S?o Tomé town, Angolares, Trindade and Neves , and on Príncipe  at Santo Antonio, Sundy, Sao Joaquim, Nova Estrella and Praia Abade.

porto-real

Porto Real, “my school” on Príncipe  (V. Schnoll – GG VI)

To say they were well received would be a gross understatement.  Again, we thank all who worked on this project (see March 9 blog: Sharing the Wealth; and for those who made GG VI financially possible, see “Partners” below).  At the adult level, we also gave five lectures on the biodiversity of the islands: two in Portugal and three at institutions on the islands themselves.

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Droo doing his thing on S?o Tomé ( R. Bell – GG VI)

Andrew Stanbridge (above), our photographer on both GG V and GG VI, is a remarkable person in many ways; much more than just a gifted professional artist.  His website is Andrewstanbridge.com

Here are some parting shots:

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PARTNERS

We gratefully acknowledge the support of the G. Lindsay Field Research Fund Hagey Research Venture Fund of the California Academy of Sciences, (GG I, II), the Société de Conservation et Développement (SCD) and Africa’s Eden for logistics, ground transportation and lodging (GG III-V), STePUP of Sao Tome http://www.stepup.st/, Arlindo de Ceita Carvalho, Director General, and Victor Bomfim, and Salvador Sousa Pontes of the Ministry of Environment, Republic of São Tomé and Príncipe for permission to collectexport specimens for study. Special thanks for the generosity of private individuals who have made the GG III-V expeditions possible: George G. Breed, Gerry F. Ohrstrom, Timothy M. Muller, Mrs. W. H. V. Brooke, Mr. and Mrs. Michael Murakami, Hon. Richard C. Livermore, Prof. & Mrs. Evan C. Evans III, Mr. and Mrs. Robert M. Taylor, Velma and Michael Schnoll, and Sheila Farr Nielsen; GG VI supporters include HBD of Bom Bom and the Omali Lodge for logistics and lodging, The Herbst Foundation, The “Blackhawk Gang,” the Docent Council of the California Academy of Sciences in honor of Kathleen Lilienthal, Bernard S. Schulte, Corinne W. Abell, Prof. & Mrs. Evan C. Evans III, John and Judy Sears, John S. Livermore and Elton Welke. Logistics and lodging for GG VI (Omali Lodge and Bom Bom Island) were kindly provided by HBD.

The Race: Mountains That Glow

 

Drs. Brian Simison and Tomio Iwamoto and Roberta Ayres and Rayna Bell left early this morning on the TAP flight for home; five of us remain: our two botanists on Principe and three of us here on Sao Tome continue. It is time for a science update, especially since it is pouring rain as I write, and our biodiversity education mission on the big island is completed for now.

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Last week, and for the first time, Academy scientists collected the top of Pico do Sao Tome. At over 2,000 meters, the peak is remote and can be quite dangerous to ascend in the rainy season, especially carrying equipment. Our guys were able to accomplish this with help from our friends, Andre Reis, Hugo Serodio and Antonio Fernandes. Andre runs Tropic Ventures, a new company that provides various tourist activities including car rentals, water sports, etc but they also take on really hairy missions into the interior of the island. Andre is ex-military (Portuguese) and his company, equipment and skills are very, very good.

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After a postponement due to the rains, Jim Shevock, Miko Nadel, and our photographer Andrew Stanbridge made two-day ascent, collecting all the way.

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Those who know Jim Shevock, the Academy’s moss expert, will not be surprised to learn that he went nuts. I have no idea how many moss specimens he got nor how many are new, but to say he was enthusiastic upon their return would be a gross understatement.

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But the neatest discovery was made by Miko Nadel, our lichen grad student from San Francisco State. Sitting and eating dinner in the darkness, Miko looked down and thought he saw Andrew’s wristwatch on the ground, glowing at his feet. What he soon discovered was not Andrew’s watch but a patch of bioluminescent mushrooms!

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Miko’s graduate advisor, Dr. Dennis Desjardin, a world authority on mushrooms, was with us on GG II and GG III and made the first comprehensive survey of both islands. But , curiously, Dennis (a Fellow of CAS) has recently been doing cutting edge research on bioluminescent mushrooms! So I waited until Dennis gave his OK, before posting Andrew’s images of these remarkable fungi. As usual, we will not know what all this means until we return to CAS for analysis. That is how science works.

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Rayna Bell’s mission was to examine the possible hybridization between the Sao Tome giant treefrog, Hyperolius thomensis and the oceanic treefrog, H. molleri. We have had genetic and phenotypic hints that this might be happening for some time now. Rayna’s PhD thesis at Cornell is on the evolution of sexual dichromatism in African treefrog species.

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It looks as though hybridization is indeed going on between the two species at about 800 to 900 meters. Rayna was able to get samples of the giant frog at 1400 meters and then sampled “downhill” at various elevations to nearly sea level, in oceanic treefrog territory. We had great help from Joao Pedro Pio, a young Portuguese friend who is working on the endemic maroon pigeon; lucky for us, he loves adventure and frogs. Rayna is tireless, bright and fun to be with; but among us bush herpetologists, the real test is how one does in the boonies. She is wonderful; I was proud to have her along with us.

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And by the way, last night (Rayna’s last), she and Andrew visited the “magic tree” where we have always found the giant treefrog.. they came in about midnight, and told me that as they sat next to the tree, waiting for frogs, the entire forest floor around them was aglow!

It is still raining and outside my door, a Sao Tome prinia is hopping around in the bushes; I will let Andrew’s pictures speak of Tomio Iwamoto and Brian’s adventures in Micoló catching mudskippers and pipefish.

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The Parting Shot:

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all photos by Andrew Stanbridge

PARTNERS

We gratefully acknowledge the support of the G. Lindsay Field Research Fund Hagey Research Venture Fund of the California Academy of Sciences, (GG I, II), the Société de Conservation et Développement (SCD) and Africa’s Eden for logistics, ground transportation and lodging (GG III-V), STePUP of Sao Tome http://www.stepup.st/, Arlindo de Ceita Carvalho, Director General, and Victor Bomfim, and Salvador Sousa Pontes of the Ministry of Environment, Republic of São Tomé and Príncipe for permission to collectexport specimens for study. Special thanks for the generosity of private individuals who have made the GG III-V expeditions possible: George G. Breed, Gerry F. Ohrstrom, Timothy M. Muller, Mrs. W. H. V. Brooke, Mr. and Mrs. Michael Murakami, Hon. Richard C. Livermore, Prof. & Mrs. Evan C. Evans III, Mr. and Mrs. Robert M. Taylor, Velma and Michael Schnoll, and Sheila Farr Nielsen; GG VI supporters include The Herbst Foundation, The “Blackhawk Gang,” the Docent Council of the California Academy of Sciences in honor of Kathleen Lilienthal, Bernard S. Schulte, Corinne W. Abell,John and Judy Sears, John S. Livermore and Elton Welke. Logistics and lodging for GG VI (Omali Lodge and Bom Bom Island) were kindly provided by HBD.

Our expeditions can be supported by tax-free donations to “California Academy of Sciences Gulf of Guinea Fund”.

The Race: Gulf of Guinea VI. First week.

Having completed my lectures at CIBIO near Porto, and in the symposium on Sao Tome and Principe in Lisbon, I hooked up with Drs Tomio Iwamoto, Brian Simison, and James Shevock, Miko Nadel and our outstanding photographer, Andrew Stanbridge in the Lisbon airport whereupon we paid gobs of money in overweight charges to TAP airlines (coloring books). The first six of us arrived at the Omali and have been working in various sites for a week until we were joined by Rayna Bell on the Friday morning flight. Rayna is the Cornell grad student who is looking at some interesting genetic problems with the treefrogs here. Early on I paid visits to Arlindo Carvalho, Director General of the Ministry of the Environment and Victor Bonfim, Director of Conservation to pay our respects and request our authorizations.

All of the photos below are by Andrew Stanbridge.

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The first six of us; lunch at Angolares, southeast Sao Tome

So far, we have found no limpets! Small barnacles, yes; marine mollusks, yes; but no true limpets. Brian is pretty much sampling everythingbut his specialty critters do not seem to be here.Whether or not there is some chemical feature of the volcanic rock that renders the rocks uninhabitable remains a question.Perhaps Principe willbe different.

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Brian Simison (right) searching rocks on Sao Tome west coast.

Jim Shevock has already found two bryophyte families new to the islands, both on the Macambrara road at about 1100 meters. This is Jim’s second trip; in GG IV, he made some 800 collections, so this is stuff we missed.

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Jim reaching for hanging bryophytes on the Rio Abade

Miko Nadel, our grad student from San Francisco State, is conducting what we think is the first lichen survey ever of these oceanic islands- so everything is kind of new.

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Miko with captured lichen; on the road to Sao Nicolau.

Tomio Iwamoto, veteran of GG I and II is working closely with the Department of Fisheries and an NGO called MARAPA to produce a guide primarily for the local fishermen.

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Tomio inspects catches near Agua Ize

Yesterday, after Rayna’s arrival, we went up to inspect the large Olea tree which is our one locality for the unique Hyperolius thomensis. Like last year, we found no adults but there were old egg masses in both tree holes, and definitely tadpoles in one of them. The rains are upon us, and we are hoping that during the next couple of weeks the other smaller green species will appear. We are being assisted by old friends and a new one, a young Portuguese graduate named Joao Pedro Pio who works with Mariana Carvalho on the endemic maroon pigeon. I think Rayna and I, Pedro and a local guy from Nova Moca will go up at night to Lagoa Amelia (nearly 1500 meters) to try to collect Hyperolius molleri.

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Andrew Stanbridge continues to take brilliant pictures. He is much more of an asset to us than just his fabulous shots.

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Andrew with Bode, famed resident of the remote Bombaim. Bode sings the Portuguese national anthem in a truly appalling voice and sells cobra skins. (photo: Brian Simison)

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Me, bargaining for a side-necked turtle (Pelusios castaneus) at Ribeira Afonso

Tuesday, the two botanists and Andrew will go up to the top of the Pico, an area we have never collected. We are being taken there by our friends from Tropic Ventures, Andre, Hugo and Maneh. At the same time, Rayna and I will go out to Rolas Island to look for caecilians.They were collected on the island many years ago and we wish to add them to our genetic map of this unique species.

Here’s the parting shot.

parting-shotImagine thousands of hectares of oil palm between this boy and Cao Grande. It is happening.

PARTNERS

We gratefully acknowledge the support of the G. Lindsay Field Research Fund Hagey Research Venture Fund of the California Academy of Sciences, (GG I, II), the Société de Conservation et Développement (SCD) and Africa’s Eden for logistics, ground transportation and lodging (GG III-V), STePUP of Sao Tome http://www.stepup.st/, Arlindo de Ceita Carvalho, Director General, and Victor Bomfim, and Salvador Sousa Pontes of the Ministry of Environment, Republic of São Tomé and Príncipe for permission to collectexport specimens for study. Special thanks for the generosity of private individuals who have made the GG III-V expeditions possible: George G. Breed, Gerry F. Ohrstrom, Timothy M. Muller, Mrs. W. H. V. Brooke, Mr. and Mrs. Michael Murakami, Hon. Richard C. Livermore, Prof. & Mrs. Evan C. Evans III, Mr. and Mrs. Robert M. Taylor, Velma and Michael Schnoll, and Sheila Farr Nielsen; GG VI supporters include The Herbst Foundation, The “Blackhawk Gang,” the Docent Council of the California Academy of Sciences in honor of Kathleen Lilienthal, Bernard S. Schulte, Corinne W. Abell, John and Judy Sears, John S. Livermore and Elton Welke. Logistics and lodging for GG VI (Omali Lodge and Bom Bom Island) were kindly provided by HBD.

Our expeditions can be supported by tax-free donations to “California Academy of Sciences Gulf of Guinea Fund”.

The Race: GG VI, Part I (the Science)

Things have been very busy here at the Academy of Sciences, and this is one of my tardier blogs! However, part of the hustle and bustle has been in planning our next expedition, Gulf of Guinea VI.

The first good news is that our new species of gecko from Príncipe is about to be formally published in the African Journal of Herpetology, possibly as soon as April. It is bad luck to give you its name before it is published, but here is what it looks like, and we are adding yet another endemic species to our wonderful islands!

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Our new gecko near Bom Bom, Principe.  Weckerphoto- GG IV

As readers know, our expeditions have largely been privately funded since GG III, and the friends who have helped us are always celebrated in the PARTNERS section below.  However, I am going to take this early opportunity to thank the folks who are making the upcoming expedition financially possible: The Herbst Foundation, The “Blackhawk Gang,” the Docent Council of the California Academy of Sciences in honor of Kathleen Lilienthal, Prof. & Mrs. Evan C. Evans III, Bernard S. Schulte, John S. Livermore, John and Judy Sears and Elton Welke.

Here are the scientist participants in the upcoming GG VI which will run from 30 March until 5 May.

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Dr. Tomio Iwamoto on Sao Tome.  D Lin phot- GGI

Dr. Tomio Iwamoto is Curator Emeritus of our Ichthyology Department, and my good friend and flyfishing buddy.  He is a veteran of GG I and GG II and has already published two scientific papers as a result of these expeditions. He has also worked with São Tomé and Príncipe fisheries people in deepwater trawling around the islands (see Shipboard Discoveries….June 2010 blog).  During GG VI he wants to visit as many local fishing villages as he can on both islands to see what the most commonly caught fishes are.  His goal is to produce a popular guide for the fishermen themselves! This will not be a scientific publication.

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A Longfin crevalle jack described to science only five years ago. Sao Tome.  A. Stanbridge phot- GG V

Brian and limpet

Dr. Brian Simison; limpet photo by  T. Laupstad]

Dr. Brian Simison is a world authority on small monovalved molluscs known as limpets, commonly found firmly attached to rocks in the coastal littoral zones.  So far as we know, this group has never before been sampled in São Tomé and Príncipe, and our expectations for new discoveries are high.

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Crocidura tomensis, the Sao Tome shrew. Phot by Ricardo Lima, 2010

Brian is alsoDirector of the Academy’s  Center for Comparative Genomics which is where all our genetic and molecular work is done.  He became involved in our molecular test of the true status of the endemic São Tomé shrew (see Unique shrew…. August 2010 blog).  Working with Eden Maloney, he discovered that the shrew on Príncipe, long thought to be a mainland species, may indeed also be an endemic to that island.  While we collected DNA of this second shrew during GG II, we collected no adults.  Assuming we receive permission from the Ministry, Brian and I will also try to secure a couple of adult Príncipe shrews. If this is indeed a unique species, we will need to be able do describe its anatomy formally.

Two graduate students will be joining us.  The first is Rayna Bell who is doing her PhD on African tree frogs at Cornell University.

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Oceanic tree frog, Hyperolius thomensis (phot RCD- GG I); Rayna Bell

Rayna will be looking at a potential hybrid zone between the oceanic tree frog (above, Hyperolius molleri) and the flambouyant São Tomé giant tree frog, H. thomensis of higher elevations, which I have featured in many of these blogs.  There is something curious going on with the genetics of these species and one of Rayna’s projects will be to look at both populations from the molecular perspective.

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Miko Nadel and lichens (from web)

Our other graduate student is Miko Nadel, who is doing his MSc in botany at San Francisco State University under the guidance of our favorite mycologist, Dr. Dennis Desjardin, describer of the now infamous Phallus drewesi of São Tomé.  Recall that Drs. Desjardin (GG II & III) and Perry (GG III) learned that over 33% of the mushrooms of São Tomé and Príncipe are new to science.  Miko informs me that there have been only a couple of scientific papers ever written on the lichens of the islands, and that was back in the 1880’s.  So it is time for a more modern and thorough look at this flora.

Finally, we round the scientist group out with the irrepressible Dr. James Shevock, the Academy’s bryophyte (mosses and their allies) expert.

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Jim Shevock with moss at the Omali.  RCD phot-GG IV

The results of Jim’s efforts during GG IV are summarized in the image below.  The largest uptick of new species for the islands is expected in the third paper, which we hope will be published this year.

moss UPDATES

Compilation and photo by RCD, GG IV

As in GG V, the new expedition will be accompanied by the world’s largest photographer, Andrew Stanbridge.  His images from GG V are magnificent, and he is a most excellent and willing field companion. His work can be viewed on the web at www.andrewstanbridge.com


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RCD and photographer Andrew Stanbridge. V. Schnoll phot – GG V

There will be two additional members of GG VI, both veterans of earlier expeditions,  Ms Velma Schnoll and Ms Roberta Ayres, but I will reintroduce  them in more detail in the second part of this blog which will be on our concurrent biodiversity education activities.

The parting shot:

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The Jockey’s bonnet, Principe. Photo by Eddie Herbst – 2011

[Herbst]

PARTNERS

We gratefully acknowledge the support of the G. Lindsay Field Research Fund Hagey Research Venture Fund of the California Academy of Sciences, (GG I, II), the Société de Conservation et Développement (SCD) and Africa’s Eden for logistics, ground transportation and lodging (GG III-V), STePUP of Sao Tome http://www.stepup.st/, Arlindo de Ceita Carvalho, Director General, and Victor Bomfim,  and Salvador Sousa Pontes of the Ministry of Environment, Republic of São Tomé and Príncipe for permission to export specimens for study.  Special thanks for the generosity of private individuals who have made the GG III-V  expeditions possible: George G. Breed, Gerry F. Ohrstrom, Timothy M. Muller, Mrs. W. H. V. Brooke, Mr. and Mrs. Michael Murakami, Hon. Richard C. Livermore, Prof. & Mrs. Evan C. Evans III, Mr. and Mrs. Robert M. Taylor, Velma and Michael Schnoll, Sheila Farr Nielsen, Corinne W. Abel and Mr. and Mrs. John Sears, Bernard Schulte, and John S. Livemore.   Our expeditions can be supported by tax-free donations to “California Academy of Sciences Gulf of Guinea Fund”.

The Race: New Species, New People and Intriguing Biogeography

Lots of news this time. First, graduate students of the University of California, Santa Cruz and California State University, Monterey Bay teamed up to do a most excellent on-line presentation of our work in the Gulf of Guinea Islands, called Documenting Eden; it includes a slide show and can be found here: http://sciencenotes.ucsc.edu/2011/pages/eden/eden.html
On the biodiversity education front led by Velma Schnoll, we are working on several projects including a coloring book of endemic species, a lesson plan to support our poster project of GG V and possibly an animated cartoon featuring the fabulous yellow caecilian, cobra bobo, as “spokescreature” for the unique species on the  islands.
Some great news is that the Academy has hired three new Curators in Microbiology, Herpetology and Ichthyology.

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Dr. Luiz Rocha, CAS Ichthyology Section.  RCD phot.

Dr. Rocha (above) is a marine ichthyologist and brilliant underwater photographer who has already worked in São Tomé and Príncipe. He was a member of a National Geographic-sponsored marine expedition in 2006 which occurred shortly after our CAS GG II expedition concluded.  The results were published in the journal Zootaxa a year later and included many of the fishes already collected on our first two expeditions by Dr. Tomio Iwamoto and others of us.

I walked into Luiz’ lab a couple of weeks ago just to talk, and found he was just finishing up the description of a new species of parrotfish from Säo Tomé, based on three specimens we collected  on earlier CAS expeditions!

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Sparisoma sp. nov., new São Tomé parrotfish. L. Rocha phot

The holotype specimen (the single “name bearer”) was collected by Dr. Tomio Iwamoto in 2006 (GG II) by hook and line from Ned Seligman’s pier on Praia Francesa.   Readers of this blog will remember that Ned is the head of an island NGO called STeP UP through which we have worked since the beginning in 2000; he is also a life-long friend of mine.

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Chez Ned (l) and the author (r),  Praia Francesa  T. Daniel phot. GG IV

The additional specimens (paratypes) include another collected directly from a beach seine by Tomio and I in 2001(GG I), and one purchased from the town fish market by Dr. John McCosker and David Catania in 2009 (GG IIIB).   It is very exciting to have a bright new colleague here at the Academy who is interested in the Gulf of Guinea; the manuscript is in review and as always, we will send the published article to the islands.

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Jim Shevock, Laguna Azul.  RCD phot GG IV

Meanwhile, our tireless moss guru, Jim Shevock, and colleagues from Dresden and Hungary have published another paper on the GG IV bryophyte collections; we have already sent the paper to the islands.  As a result of Jim’s GG IV work, the authors report 18 species of liverworts and hornworts  (moss relatives) as new for the Republic of São Tomé and Príncipe overall.  With respect to the two islands, 13 new species records have been found new to Príncipe and 16 new for São Tomé.  None of these species is new to science, but the country list for liverworts and hornworts is now 147 species, a much greater diversity than was known.

My lab has been quite active all summer.  Eden Maloney returned from UCLA to further refine the genetic component of her work on the endemic São Tomé shrew, Crocidura thomensis; this research includes the ecological work by our colleague Ricardo Lima, a doctoral student at  Lancaster University and genetic work by Dr. Brian Simison, Director of our Center for Comparative Genomics.

Much of our recent focus in the lab has been on the endemic, Greeff’s  giant gecko, Hemidactylus greeffi,  described from São Tomé by the Portuguese biologist Bocage in 1886.

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Greeff’s giant gecko (Hemidactylus greeffi), road culvert, Praia Mutamba. D. Lin phot. GG I

This species is unique among the 90+ members of the genus Hemidactylus,  in that it lacks the claw and the actual terminal bone (phalanx) of the thumb.

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Bom Bom, Principe Weckerphoto –  GG IV

Evolutionary loss of the first claw is known from a species in Brazil, H. brasileanus but until now, absence of the underlying terminal phalanx has been thought to be unique to Greeff’s giant gecko.

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Hemidactylus brasileanus phot: animaldiversity, U. Michigan

H. greeffi was thought to inhabit both São Tomé and Príncipe islands but in 2005, our colleague, José Jesus of the University of Madeira and his co-workers compared the genetics of samples from both islands and found significant differences in mitochondrial DNA sequence between them.  However, they did not find any differences in the nuclear genes they examined and thus deferred describing the Príncipe individuals as new.

In June, I tasked my Summer Systematics Intern, Elizabeth Miller of UC San Diego, with doing a detailed anatomical examination of our collections of the geckos from both islands, along with a molecular study of the two populations using the data kindly sent to us from Dr. Jesus but also employing new, faster-evolving nuclear genes.

Long before the genetic analysis was completed, Elizabeth found obvious and consistent morphological differences between the two populations.   In fact, these differences are so striking that I think if anyone had ever done careful comparison of the bodies of the two sets of geckos, the Príncipe population would have been described as a separate species long ago, DNA evidence notwithstanding.

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left, Sao Tome, D. Lin phot- GGI;  right, Principe, Weckerphoto GG III

Among the many character differences she found was in iris color!  H. greeffi of São Tomé has beautiful light, moss-green eyes, while in the Príncipe population, the eyes range from gold to light copper.  This would seem to be an obvious, readily recognizable difference, but it must be remembered that except for Dr. Jesus and his colleagues, all previous scientists who have studied these geckos have been dealing with preserved specimens, in which eye color is invariably lost—in fact much body pigmentation is lost in museum preservatives .

Subsequent DNA sequence data generated by Elizabeth in our Center for Comparative Genomics confirmed that José Jesus and his colleagues were correct; the Príncipe populations do indeed represent a separate, undescribed species.  At the same time, however, they share with H. greeffi of São Tomé the absence of the terminal phalanx of the thumb; this strongly suggests that H. greeffi and H. sp. nov. are each other’s closest relatives (but more on this below).

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Miller (back left) presenting our results to the Summer Systematics Institute, August 2011 RCD phot

Currently Elizabeth and I, along with Anna Sellas of our CCG molecular lab are completing a formal description of the new gecko from Príncipe.  The two gecko species, along with their purported nearest relatives present quite an interesting biogeographical question, now being addressed by my graduate student, Dashiell Harwood.  At first glance, our molecular results suggest that the ancestor of both H. greeffi and the new Príncipe species colonized São Tomé first, then later made it across to Príncipe but we have a number of reasons for doubting this scenario.   Part of Harwood’s project will be to employ Elizabeth’s data plus additional genes and deeper analysis in order to answer this initial question.  But if we can obtain appropriate samples, there is a much broader gecko issue we can study.

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cladogram from Bauer et al. (2010) Mol. Phylo. Ev. 57

Above is a small subset of a much larger cladogram of Hemidactylus species done by our colleague Dr. Aaron Bauer of Villanova University and his co-workers.  The highlighted box indicates H. greeffi and its closest known relatives, H. longicephalus of the African mainland (also São Tomé) and H. brasileanus of South America.  The species examined in Bauer’s study did not include samples of our new gecko from Príncipe Island.

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African-Atlantic partial distribution.

The image above is a visual perspective of the rough distributions of four species of Hemidactylus, including Príncipe.  If the cladogram is a true reflection of the relationships of three of the four species here, and if the Príncipe gecko is indeed, H. greeffi’s closest relative and fits in as we surmise, then the common ancestor of all four species must have crossed the Atlantic, from the African continent to northern South America.   This is not a new idea and was proposed by Carranza and Arnold in 2006, who stated that during the last 15 million years, African lineages have crossed the Atlantic by random (natural) dispersal at least twice.  The likelihood of this long-range dispersal is strengthened by a look at the dominant Atlantic currents.  Readers of the blog will recognize the South Equatorial Current as the same one we invoke as providing a “freshwater pathway” for rafting from the Congo and Niger Rivers on the mainland, straight through the Gulf of Guinea archipelago (see Oct and Nov, 2008 blogs and Measey, et. al (2007) Journal of Biogeography 34.)

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Major Atlantic Ocean Currents

In the Carranza and Arnold paper, H. longicephalus and three additional Brazilian species were employed, as was “H. greeffi”; however, the tissues we sent the authors were from Príncipe, before we knew the two island populations were distinct.  So Harwood’s graduate work should shed some light not only on the relationships between these geckos, but their geographic origins and history.

Here’s the Parting shot:

sunset-rwSunset on Bom Bom Island, R. Wenk phot.  GG IV

PARTNERS

We gratefully acknowledge the support of the G. Lindsay Field Research Fund Hagey Research Venture Fund of the California Academy of Sciences, (GG I, II), the Société de Conservation et Développement (SCD) and Africa’s Eden for logistics, ground transportation and lodging (GG III-V), STePUP of Sao Tome http://www.stepup.st/, Arlindo de Ceita Carvalho, Director General, and Victor Bomfim, Salvador Sousa Pontes and Danilo Barbero of the Ministry of Environment, Republic of São Tomé and Príncipe for permission to export specimens for study, the support of Bastien Loloum of Zuntabawe  and Faustino Oliviera, Curator of the Herbarium at Bom Sucesso. Special thanks for the generosity of private individuals who have made the last three expeditions possible: George G. Breed, Gerry F. Ohrstrom, Timothy M. Muller, Mrs. W. H. V. Brooke, Mr. and Mrs. Michael Murakami, Hon. Richard C. Livermore, Prof. & Mrs. Evan C. Evans III, Mr. and Mrs. Robert M. Taylor, Velma and Michael Schnoll and Sheila Farr Nielsen. Our expeditions can be supported by tax-free donations to “California Academy of Sciences Gulf of Guinea Fund”.

The Race: Lunch on the Front Lines

The end of our first full week and today we had an alfresco lunch with Francisca. Francisca is the Director of the largest primary school on Sao Tome—she has over 2,000 students, and 57 teachers who work either a morning or an afternoon shift.  Very few supplies.. a big job. Lunch was set up in her front yard and despite the beginnings of rainstorm, we were protected (for a while) by huge trees overhead.

The menu began with an enormous bottle of White Horse scotch, and included sea snails, manioc, grilled fish of uncertain origin and other wondrous things.

The rain soon became untenable and we retired inside to discuss the use of images, posters, etc in her living room.  We gave her some images and some videos of local endemic critters to use in her school and anywhere else she wanted.  A delightful person and a typical representative of the devotion and enthusiasm of the Sao Tomean teachers we have met.  By later this afternoon the rain had flooded parts of the city; we drove past guys standing ankle-deep in the streets.

Tomorrow, we fly to the older island, Principe.  We greatly underestimated the number of biodiversity posters we would need here on the big island, so we have had to do some rationing.  In the meantime Andrew, our photographer, came up with a fabulous idea.  Here in town, we can cheaply print postcard-sized image collages to hand out to the kids.. about $60 for one hundred.. while these are not as flashy as the posters, the kids absolutely love them and it keeps our momentum going.. The ones we have done here say “Only on Sao Tome” in Portuguese, and this morning we printed another hundred for Principe with a similar message.

More from Principe.

Here’s the parting shot:

Carpe Diem! Poaching wireless from NGO offices down the hill.

all images © Andrew Stanbridge

PARTNERS
We gratefully acknowledge the support of the G. Lindsay Field Research Fund (GG I), Hagey Research Venture Fund (GG II) of the California Academy of Sciences, the Société de Conservation et Développement (SCD) and Africa’s Eden for logistics, ground transportation and lodging (GG III-V), STePUP of Sao Tome http://www.stepup.st/., Arlindo de Ceita Carvalho, Director General, and Victor Bonfim, Salvador Sousa Pontes and Danilo Barbero of the Ministry of Environment, Republic of São Tomé and Príncipe for permission to export specimens for study, the continued support of Bastien Loloumb of Zuntabawe and Faustino Oliviera, Director of the botanical garden at Bom Sucesso. Special thanks for the generosity of private individuals, George G. Breed, Gerry F. Ohrstrom, Timothy M. Muller, Mrs. W. H. V. Brooke, Mr. and Mrs. Michael Murakami, Hon. Richard C. Livermore, Prof. & Mrs. Evan C. Evans III, Mr. and Mrs. Robert M. Taylor, and Mrs. Sheila Farr Nielsen for helping make these expeditions possible. Tax-deductable donations in support of this work can be made to “CAS-Gulf of Guinea Fund.”

The Race: Celebrations, Updates and a Memorial

I have been informed by a colleague that my last blog was a tad on the “heavy” side; I cannot apologize for this as sometimes science is difficult to describe in an informal blog, but this blog will be slightly different.

First celebration. We have just learned that Island Biodiversity Race has been ranked #3 Best Biodiversity Blog by The Pimm Group of Duke University (US).

Here is the link: http://thepimmgroup.org/919/best-biodiversity-blogs/

Needless to say, it is wonderfully gratifying to learn that people have been reading this, and thus that it is worth the effort. But it is way more important that the people of São Tomé and Príncipe and their unique islands are beginning to get some attention, especially with development looming.

In earlier blogs I have mentioned our poster project. The posters are meant to do the same thing as the blog but will be much more accessible to the Sao Tomeans — not too many fishermen carry laptops in their dugouts! Below is a finished poster (lacking one logo) and when printed and laminated, we intend to post them in every school and public building that will have them as a visual message that the islands are unique. Each individual image is an endemic species, and there are 5 different iterations of two sizes with different species. The one below will be 20 X 24”, others will be nearly twice as large. We are very close to printing.

THERE ARE NO OTHER ISLANDS LIKE OURS!!

You will note that there are no fish in the above poster, nor will there be any in the first round of posters. While we have a number of new species, none has been officially described as yet.  However, luckily the Academy was just visited by Dr. Luiz Rocha of the University of Texas. Luiz was on a 2006 marine expedition that led to a publication on the coastal fishes of São Tomé and Príncipe. Another author on that same paper was our own Dr. Tomio Iwamoto who was a participant in both GG I and GG II and whose island work has been featured on this blog many times. Just to prove there are gorgeous endemic fishes  found only in the islands, here are two, courtesy of Dr. Rocha.

Thalassoma newtoni, an endemic wrasse. (Rocha)

Clepticus africanus, another endemic wrasse. (Rocha)

Second celebration. I introduced myself once at the beginning of this blog back in 2008; I won’t again beyond suggesting you see the first and second blog and mentioning that I and many of our Gulf of Guinea expedition scientists and grad students are part of a very old scientific organization. Yesterday, our Department of Herpetology (my home) just cataloged our 300,000th specimen. This is a very big  deal, and our reptile and amphibian collection (including all of our São Tomé and Príncipe material) is the 6th largest collection in the world. Our reptiles alone are the third largest collection in the world!

(l-r: me, Jens Vindum, Sr. Collections Mgr., and Lauren Scheinberg, Research Assistant. – phot. V. Schnoll

Updates:  I still have no final word on our millepedes, currently being studied at the Royal Central African Museum by a colleague, but the last hint was that we have three species (one new), all of one genus, Globanus. And just before he left for southern Chile, Jim Shevock (GG IV) showed me a manuscript on a host of new records and new species of bryophytes from São Tomé and Príncipe.  He is submitting the paper for publication with his European colleagues.

Finally, we got news from the islands a few weeks ago of the death of our friend, Abade. Abade was Ned Seligman’s cook and great character. I first met him 12 years ago when I went alone to the islands to begin organizing the future expeditions with the help of STeP UP, Ned’s NGO. Abade had a sort of secret, enigmatic, vaguely evil smile that somehow reminded me of the way a sorceror should look.  He had a wonderful sense of humor and I jam convinced he understood English perfectly well… he just wouldn’t speak it to me! Just one Abade story among many: during GG I, we were desperate to find one of the endemic frog species, Newton’s rocket frog (below).

Newton’s rocket frog, Ptychadena newtoni – endemic to Sao Tome

We were assured they were once common downtown but we had been  unsuccessful so far. At dinner one night at Ned’s, Abade (through Ned) decided he would show us these frogs, and we all marched off into the night through a grassy field near the airport. As we were searching by flashlight, we suddenly heard the thunder of many running boots coming down metal stairs in two large building off in the gloom.  Abade had led us onto the army base and the troops had obviously seen our lights in the field! Believe me, if there is one place anywhere in Africa you do not ever want to be , it is on an military base! We all ran like a flock of chickens with Abade in the lead, of course.  We remained frogless for a couple of  weeks until we figured out how to find us.  All of us of all of the GG teams will miss  him.

More anon.

The parting shot:

Abade, in Ned’s kitchen.   Ciao, Amigo!  RCD phot – GG IV.

PARTNERS

We gratefully acknowledge the support of the G. Lindsay Field Research Fund, Hagey Research Venture Fund of the California Academy of Sciences, the Société de Conservation et Développement (SCD) and Africa’s Eden for logistics, ground transportation and lodging, STePUP of Sao Tome http://www.stepup.st/, Arlindo de Ceita Carvalho, Director General, and Victor Bomfim, Salvador Sousa Pontes and Danilo Barbero of the Ministry of Environment, Republic of São Tomé and Príncipe for permission to export specimens for study, the continued support of Bastien Loloum of Zuntabawe and Faustino Oliviera, Curator of the Herbarium at Bom Sucesso. Special thanks for the generosity of private individuals, George G. Breed, Gerry F. Ohrstrom, Timothy M. Muller, Mrs. W. H. V. Brooke, Mr. and Mrs. Michael Murakami, Hon. Richard C. Livermore, Prof. & Mrs. Evan C. Evans III, Mr. and Mrs. Robert M. Taylor and Velma and Michael Schnoll for helping make these expeditions possible. Our expeditions can be supported by donations to “California Academy of Sciences Gulf of Guinea Fund”.

The Race: Shipboard Discoveries from a Good Friend

I have much to report on GG IV results so far, including updates on millipedes, whip scorpions, freshwater red algae (!) and other fascinating new island critters but Academy activity level has been very high since the team got back, and I have just returned from Capetown where I gave talk on the GG Island biodiversity. This week we welcomed Eden Maloney of the University of California at Los Angeles to the lab. Eden will be working all summer on the genetics of the São Tomé shrew, samples of which have been provided by our colleague, Ricardo Lima with kind permission from the STP Ministry of Environment.

Eden “Shrewster” Maloney (UCLA) examining her first shrews at the Academy.  (phot. RCD)

In earlier blogs, we have posed the question: Is the shrew on Sao Tome, Crocidura thomensis really an endemic species, or was it introduced from elsewhere by man?  Eden will be able to answer the question in a couple of months based on comparing the DNA sequences of our samples with related mainland species.  The possibility exists that if native to São Tomé, this may prove to be the only endemic oceanic island shrew in the world! Followers of the blog will already know why this is biogeographically so unlikely.

I will update you on exciting GGIV findings in later blogs; right now I want to report on some marine activities that have just occurred since the GGIV team returned a couple of months ago. In reading the account below, bear in mind that the inshore marine organisms are just as isolated as are the terrestrial species; these are old, old islands both above and below the sea surface, and we must include marine critters adapted to the underwater parts of the islands as just as likely to have endemic species as those in the forests and other terrestrial habitats.

Quintino Quade and Dr. Tomio Iwamoto, seining on Sao Tome.  [D. Lin phot. GG I]

Readers of the blog will already be acquainted with Dr. Tomio Iwamoto, Chair of our Department of Ichthyology and veteran of GG I and GG II. During these first two expeditions, Tomio studied and seined almost all of the freshwater rivers and streams on both islands and co-authored two papers on the results; the first in 2006 was a study of the species of gobies that dominate the island freshwater environment on the islands, and the second was an update of the list of coastal marine fishes written with a number of authors in 2007.  Much of our GG I and GG II material is in this work as Tomio also interacted with the local fisherman and the fish markets.  This publication lists a total of 185 species with several not yet described.

Norwegian Research Vessel, R/V Dr. D. Fridtjof  Nansen [phot O. Alvheim, 2010]

Although he has done all of our freshwater island work, Tomio is actually a marine ichthyologist specializing in a deep-sea group called grenadiers, and he is a frequent participant on scientific trawling expeditions.

As luck would have it, shortly after the GG IV team returned to the Academy, Tomio joined the crew of the Norwegian research vessel Nansen, and although originally scheduled to trawl along the coast of Ghana the itinerary changed and the vessel actually worked the waters of São Tomé and Príncipe for two weeks.  Timing could not have been better because about this time, here at the Academy I began receiving emails from friends on the islands about a mass die-off of the local pufferfish, known also as the Oceanic or Rabbit puffer. Apparently the southeastern beaches of São Tomé were covered with dead ones, and the local people were quite concerned.  I was able to email Tomio on board the Nansen and the ship was in perfect position to look into the matter.

Oceanic or Rabbit pufferfish, Lagocephalus lagocephalus. [Phot. O. Alvheim 2010.]

According to several staff of the Nansen, such die-offs have been seen before, especially off the coast of Gabon, south to northern Angola, but appear to have become somewhat regular since 2007, usually in March-May.  The vessel monitors water salinity, current velocity and temperature at all transects trawled. None of the Rabbit puffers they studied showed any signs of disease or physical trauma; however, about 4 miles offshore of the town of São Tomé, they came upon a current boundary lined with floating dead puffers.

Jens-Otto Krakstad and Dr. Iwamoto examining dead puffers [Phot O. Alvheim 2010]

Usually such boundaries occur between bodies of water different in both salinity and/or temperature.  In their report to the STP Fisheries, they consider the possibility that rapid changes in temperature/salinity could account for these die-offs, but so little is known of the oceanography of the two islands that a positive explanation is elusive.

Giant squid (Lula) catch. Sao Tome northeast coast [ RCD phot.  2000]

It is curious that these die-offs seem to coincide with the annual appearance of large squid (called Lula). These are greatly prized by the locals who wade in the surf, catch them by hand and throw them onto the shore. We’ve eaten them—they’re good.  But it is equally possible that the appearance of the large squid is the result of some sort of breeding activity and not related to changes in the water at all, nor correlated with the puffer die-offs.

Tomio examining grouper, Sao Tome. [phot. O. Alvheim 2010]

Shipboard life for a research ichthyologist is exciting (and exhausting) as one never knows what the next net will contain, and they are hauled in as often as every 4 hours, 24 hours a day!  Tomio’s emails were delightful.  Here is some fun stuff in his own words:

We made a so-so haul yesterday afternoon, coming up with nothing much different. There was a large sea cucumber that was caught–looked like a large loaf of bread with large blotches on the dorsum. I set it aside in a pan with plans to take a tissue sample and a patch of skin for Rich Mooi’s [GG II] colleague, David Pawson………..

Unidentified sea cucumber aboard the Nansen [phot O. Alvheim]

After working up the catch, I brought the cuke into the wet lab and took my samples before going out on deck to work up the next catch. When I returned, I was startled when I discovered something thrashing about in the pan …. Lo and behold, it was a carapid, a pearl fish or fieraster, that lives within the holothuroid. Pearlfishes are freeliving or either parasitic or live as inquiline residents in many invertebrates, such as sea cucumbers, clams, tunicates, starfishes.


Unidentified Pearlfish or Feiraster  [phot O. Alvheim 2010 ]

This represents just another of many new fishes recorded from STeP…. We caught an entirely different kind of pearlfish off Ghana…….All in all, the Nansen seems to have recorded at least fifty (50 !) species of fish never before recorded for the island coastal waters, including the first specimen of a fish called Carangoides bartholomaei ever taken in the eastern Atlantic.

Carangoides bartholomaei– first specimen from the eastern Atlantic. [Phot O. Alvheim 2010]

When I first visited the islands in 2000, I was invited to dinner at what I was told was the “best restaurant in town” called the Blue Container.  I thought to myself, ”what a peculiar name for a restaurant” and remained somewhat mystified until we actually arrived, when I learned that that is exactly what it is: a light blue shipping container that each night opens up and barbeques fish! I am sure it has another name, but it is most famous as the Blue Container.

At the Blue Container: Ned Seligman (STePUP), T. D’Espiney (former ECOFAC director), me and MARAPA worker.  [RCD phot 2000).]

The Blue Container specializes in grilled Flying gurnard, highly sought after and known locally as Con- con (for English speakers pronounced “kong kong”, but without the ”g”).  The Con-con is inevitably served with breadfruit and marine snails.

Flying Gurnard or Con-conDactylopterus volitans [Iwamoto phot. 2010]

The Con-con does not fly, of course.  The name comes from the highly specialized wing-like pectoral fins; it apparently is a bottom dweller that sort of “walks” on these fins. Here is another excerpt from Tomio’s emails:

I now know why Con-con is so popular a fish in these islands: the water is full of them. I wish I had taken a shot of our first haul; pretty close to being entirely made up of [this species]!

A typical trawl haul with a lot of Con-con [Phot O. Alvheim 2010]

More Con-con [Iwamoto phot. 2010]

There is no question that such a survey is of enormous benefit to the Republic of São Tomé and Príncipe; knowing the actual makeup of the fisheries resources of their island can lead to more effective management, and members of the Department of Fisheries accompanied the Nansen throughout the survey.

Staff of the STP Department of Fisheries [phot. O. Alvheim 2010]

Fisheries staff measuring Con-con. [Phot O. Alvheim 2010]

On this survey, many of the local fishermen benefitted directly! Here, again, is Dr. Iwamoto: We were off the northwestern tip [São Tomé] where we anchored and hung around overnight after setting out [off-shore] fish traps. This morning, the guys went out to retrieve them and couldn’t locate a one—taken by locals during the night.! That day, The STeP cruise leader, Jose Dias de Sousa Lopes and crew went onshore and made a deal with the local fishermen: leave our traps alone and we will give you our catch.  Thereafter, the traps were remained in place, and the local fishermen paddled out to receive this unexpected bounty!

Fishermen awaiting the Nansen catch. [Phot. O. Alvheim 2010]

There IS such a thing as a freelunch! [Phot. O. Alvheim 2010]

As a final note, Dr. Iwamoto emailed some comments about Príncipe that very much support some of my own conclusions from our work on the islands:

It seems obvious that Príncipe and São Tomé are under very different hydrographic regimes…….The waters around Príncipe lack the biomass one sees in places like Angola, but the overall size of the fishes caught is quite large, suggesting a pristine, little exploited population. Colors of fishes here also tend to be brighter, this according to one of the Norwegian biologists….

These statements reinforce the geological evidence that Príncipe is much older than the big island (twice as old in fact) and this is perhaps reflected in the age and stability of its fish populations.

Satellite image of Principe.  Arrow denotes predominent weather direction (RCD construct]

Viewed from above, one can readily see how large Príncipe must have been some 30 million years ago. The light blue areas are today at about 90 meters in depth but these margins are undoubtedly the original perimeter of the island at its earliest origins – it was probably larger than São Tomé is now.  The predominant weather in the Gulf of Guinea is from the southwest [red arrow] and probably has been for millions of years. So one can see that the island has gradually eroded away from the southwest to northeast.

Cross-section of island of Principe. [RCD construct]

In the above cross-section the part of old Príncipe that has worn away and is now under some 90 meters of water is beneath the blue arrow. In fact, the southwest exposures of Bioko, Príncipe and São Tomé are the steepest and most heavily eroded and on all three, this aspect of each of the islands is accessible only by boat.

Enough for now. Suffice to say that as I write, scientific colleagues at the Smithsonian Institution, Old Dominion University and the South African Institute of Aquatic Biology are describing at least five new marine fish species collected by the California Academy of Sciences Gulf of Guinea Expeditions.

The Parting shot.

Old fishin’ buddies on Praia das Conchas, Sao Tome.  Weckerphoto GG III

PARTNERS

We gratefully acknowledge the support of the G. Lindsay Field Research Fund, Hagey Research Venture Fund of the California Academy of Sciences, the Société de Conservation et Développement (SCD) and Africa’s Eden for logistics, ground transportation and lodging, STePUP of Sao Tome http://www.stepup.st/, Arlindo de Ceita Carvalho, Director General, and Victor Bomfim, Salvador Sousa Pontes and Danilo Barbero of the Ministry of Environment, Republic of São Tomé and Príncipe for permission to export specimens for study, the continued support of Bastien Loloum of Zuntabawe  and Faustino Oliviera, Curator of the Herbarium at Bom Sucesso. Special thanks for the generosity of private individuals, George G. Breed, Gerry F. Ohrstrom, Timothy M. Muller, Mrs. W. H. V. Brooke, Mr. and Mrs. Michael Murakami, Hon. Richard C. Livermore, Prof. & Mrs. Evan C. Evans III, Mr. and Mrs. Robert M. Taylor and Velma and Michael Schnoll for helping make these expeditions possible.  Our expeditions can be supported by donations to CAS – Gulf of Guinea Fund.