Carleton University Students Studying Thermal Tolerances in the Checkered Puffer Fish and Bonefish at CEI

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Two students from Carleton University in Ottawa, Felicia St-Louis and Petra Szekeres, will be on The Island School campus until June 19th collecting data for their research on the thermal biology of the checkered puffer fish (Sphoeroides estudineus) and bonefish (Albula vulpes). Over her short visit this past February, Felicia was able to validate intra-muscular cortisol injections as a method of increasing blood cortisol (i.e. a stress hormone) to ecologically relevant levels in the checkered puffer for her MSc project. She is examining the effects of short-term cortisol elevation on the thermal biology of the puffers in the lab as well as in the field. By building a thermal profile of Page creek and releasing puffers tagged with thermal logging iButtons within the creek for a one month period, she will be able to compare habitat preferences between control and cortisol-dosed puffers. Continue reading

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On Plastic Research Expedition with Kristal Ambrose

Cape Eleuthera Institute’s Kristal Ambrose embarked on her epic journey to of plastic research, leaving on April 24th.. From Nassau, Bahamas to Texas, USA; from Tokyo, Japan to Guam; and finally, on to Majuro, Marshall Islands, the last two weeks have been a whirlwind of exploration, opportunity, and learning for Ambrose, CEI’s Aquaponics Intern and researcher dedicated to finding solutions to plastic pollution in the world’s oceans.

“Most of what we eat, drink or use in any way comes packaged in petroleum plastic—a material designed to last forever yet used for products that we use for as little as thirty seconds then throw away,” describes Ambrose on her blog. “Plastic creates toxic pollution at every stage of its existence: manufacture, use, and disposal. This is a material that the Earth cannot digest. Every bit of plastic that has ever been created still exists, including the small amount that has been incinerated and has become toxic particulate matter. In the environment, plastic breaks down into small particles that release toxic chemicals into the environment. These particles are ingested by wildlife on land and in the ocean, contaminating the food chain from the smallest plankton to the largest whale…This trip will serve as my formal training experience to tackle the plastic pollution and marine debris issue within my country.”

In Nassau during the days before departure, Ambrose was invited to tea at the home of His Excellency Sir Arthur Foulkes, Governor General of The Bahamas. Continue reading

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Dartmouth PhD Student Studying Bahamian Lizards at CEI

A PhD student from Dartmouth College in New Hampshire, Mike Logan, will be on the Island School campus until May 31st collecting data for his research on thermal adaptation in lizards. Mike’s PhD focuses on the response to climate change in lizards, and in the Bahamas he is conducting transplant experiments to examine how traits like the thermal sensitivity of running speed might evolve in response to environmental warming. This May, Mike is capturing roughly 100 individual Anolis sagrei (Bahamian brown anoles) from a shady habitat on the interior of the island, measuring their running speeds as a function of body temperature in the lab, and then releasing them onto a sun-baked peninsula. Each lizard will be individually marked, so that when Mike returns in late August he can recapture all the survivors from the sunny habitat and figure out which lizards were “selected for.”

His hypothesis is that the lizards with the highest thermal tolerance (highest ‘optimal temperature for running’) Continue reading

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