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Sea Turtle and Jaguar Research | GDFCF
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Biomanagement</a></div> </div> </div> <div class="panel-separator"></div><div class="panel-pane pane-page-title" > <div class="pane-content"> <h1>Sea Turtle and Jaguar Research</h1> </div> </div> <div class="panel-separator"></div><div class="panel-pane pane-page-content" > <div class="pane-content"> <div id="node-341" class="node node-page clearfix" about="/sea-turtle-and-jaguar-research" typeof="foaf:Document"> <span property="dc:title" content="Sea Turtle and Jaguar Research" class="rdf-meta element-hidden"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span> <div class="content"> <div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even" property="content:encoded"><p class="gdf-paragraph">GDFCF supports the work of Costa Rican scientists and their research on iconic species that call ACG home, such as several species of threatened sea turtles, as well as the jaguars that prey upon them.</p> <h3>Sea Turtles and Jaguars</h3> <div class="caption"><img typeof="foaf:Image" src="/sites/default/files/styles/standard_page_full_column/public/Screen%20Shot%202020-07-10%20at%2010.51.53%20AM.png?itok=FdE3VF1r" width="610" height="455" alt="" /><br> Olive Ridley hatchlings (photo by Luis Fonseca).</div> <p>The coastlines of ACG support some of the most globally important nesting beaches in the world for Olive Ridley sea turtles (<em>Lepidochelys olivacea</em>). Its pristine and undisturbed beaches are also home to nesting Green, Hawksbill, and Leatherback sea turtles. Olive Ridley sea turtles are known for their mass synchronized nesting events, called arribadas, when thousands of turtles come nightly to the beaches of ACG. Turtle biologist Luis Fonseca L贸pez has been studying the sea turtles of ACG for more than a decade. His sea turtle monitoring project is integral to understanding population trends over time and in designing management and conservation actions that promote the recovery of sea turtle populations in this part of Costa Rica. Fonseca has also expanded his research focus to cover the prey/predator phenomenon between nesting sea turtles and ACG鈥檚 jaguar (<em>Panthera onca</em>) population. While his research shows that the number of turtles eaten by jaguars has little effect on the overall population of Olive Ridleys, the turtles are an important source of food for animals of higher trophic level, such as jaguars, crocodiles, mountain lions and birds. Along with supporting Fonseca鈥檚 research, GDFCF has contributed to refurbishing Estaci贸n Nancite, one of ACG鈥檚 most remote research stations, where much of Fonseca鈥檚 work is based. You can access Fonseca's published research below:</p> <ul> <li>Luis G. Fonseca, Wilbert N. Villachica, Eduardo Rangel, Eric Palola, Monique Gilbert, Rold谩n A. Valverde. <a href="https://acrobat.adobe.com/id/urn:aaid:sc:US:c97f270a-90d9-4a9b-aa15-bfa1c6fe9731">Reassessment of the Olive Ridley Sea Turtle <em>Lepidochelys olivacea</em> Nesting Population at Nancite Beach, Costa Rica</a>. <em>Marine Ecology</em>. 2023.</li> <li>Fonseca, L. G., Villachica, W. N., Rangel, E., Aguilar, J. P., Palola, E., Gilbert, M., Quir贸s, W. Plotkin, P., Castro, M., Zeled贸n, R., Rodr铆guez, J. O., S谩nchez, A., Fern谩ndez, R., Santoro, C. M., Chaves, B., Sp铆nola, R. M. & R. A. Valverde. <a href="https://acrobat.adobe.com/id/urn:aaid:sc:US:8e7e1bb9-3a47-4f74-9668-5e789514ad1b">Monitoreo de los jaguares predadores de tortugas marinas en las playas de Nancite y Naranjo (periodo 2005 -2021), 脕rea de Conservaci贸n Guanacaste</a>. <em>Fundaci贸n Grupo de Amigos Naturalistas (FUNGUANA)</em>. 2022.</li> <li>Luis G. Fonseca, Stephanny Arroyo-Arce, Ian Thomson, Wilbert N. Villachica, Eduardo Rangel, Rold谩n A. Valverde, Pamela T. Plotkin, Wagner Quir贸s-Pereira. <a href="https://acrobat.adobe.com/id/urn:aaid:sc:US:b0407a70-f5d2-4830-8ff8-408fe5213f5a">Impacts of Jaguar Predation on Nesting Sea Turtles at Nancite Beach, Santa Rosa National Park, Costa Rica</a>. <em>Herpetological Conservation and Biology</em>. 16 December 2020.</li> <li>P. Santidri谩n Tomillo, L.G. Fonseca, M. Ward, N. Tankersley, N.J. Robinson, C.M. Orrego, F.V. Paladino, V.S. Saba. <a href="https://acrobat.adobe.com/id/urn:aaid:sc:US:ecf79d26-2157-4153-a857-2258157a168f">The Impacts of Extreme El Ni帽o Events on Sea Turtle Nesting Populations</a>. <em>Climatic Change</em>. 15 January 2020.</li> <li>Luis G. Fonseca, Pilar Santidri谩n Tomillo, Wilbert N. Villachica, Wagner M. Quir贸s, Marta Pesquero, Maike Heidemeyer, Frank Joyce, Pamela T. Plotkin, Jeffrey A. Seminoff, Eduardo R. Matarrita, Rold谩n A. Valverde. <a href="https://acrobat.adobe.com/id/urn:aaid:sc:US:790df092-6354-44d8-b3c5-fbe122df4c3f">Discovery of a Major East Pacific Green Turtle (Chelonia mydas) Nesting Population in Northwest Costa Rica</a>. <em>Chelonian Conservation and Biology</em>. 2018.</li> <li>Luis G. Fonseca, Stephanny Arroyo-Arce, Ian Thomson, Wilbert N. Villachica, Rold谩n A. Valverde. <a href="https://acrobat.adobe.com/id/urn:aaid:sc:US:746a048c-cb02-4417-bc13-709a5ede4723">Records of Pumas Scavenging at Jaguar Kills in Santa Rosa National Park, Costa Rica</a>. <em>CATnews</em>. Spring 2018.</li> <li>Pilar Santidri谩n-Tomillo, Nathan J. Robinson, Luis G. Fonseca, Wagner Quir贸s-Pereira, Randall Arauz, Madeleine Beange, Rotney Piedra, Elizabeth V茅lez, Frank V. Paladino, James R. Spotila, Bryan P. Wallace. <a href="https://acrobat.adobe.com/id/urn:aaid:sc:US:ecb5f230-1ca1-46f9-b962-9587acf8b223">Secondary Nesting Beaches for Leatherback Turtles on the Pacific Coast of Costa Rica</a>. <em>Latin American Journal of Aquatic Research</em>. 2017.</li> <li>Luis G. Fonseca, Stephanny Arroyo-Arce, Ian Thomson, Wilbert N. Villachica, Rold谩n A. Valverde. <a href="https://acrobat.adobe.com/id/urn:aaid:sc:US:2d565254-386f-4c45-86eb-2446e54f6463">New Records of Jaguar Predation on Sea Turtles, Pacific Coast, Costa Rica</a>. <em>CATnews</em>. Autumn 2017.</li> <li>Sergio Escobar-Lasso, Luis G. Fonseca, Wilbert N. Villachica, Hansel Herrera, Rold谩n A. Valverde, Wagner Quir贸s-Pereira, Marta Pesquero, Pamela T. Plotkin. <a href="https://acrobat.adobe.com/id/urn:aaid:sc:US:2735c5c9-8633-4ec7-a0d3-f5a346d3973b">First Field Observation of the Predation by Jaguar (Pantera onca) on Olive Ridley Sea Turtle (Lepidochelys olivacea) at Nancite Beach, Santa Rosa National Park, Costa Rica</a>. <em>Mammology Notes</em>. 2016.</li> <li>Sergio Escobar-Lasso, Margarita Gil-Fern谩ndez, Hansel Herrera, Luis G. Fonseca, Eduardo Carrillo-Jim茅nez, Joel S谩enz, Grace Wong. <a href="https://acrobat.adobe.com/id/urn:aaid:sc:US:81d8815c-a621-48c7-91e7-c666c63555d4">Scavenging on Sea Turtle Carcasses by Multiple Jaguars in Northwestern Costa Rica</a>. <em>Therya</em>. 2016.</li> <li>Sergio Escobar-Lasso, Luis G. Fonseca, Margarita Gil-Fern谩ndez, Wilbert N. Villachica, Stephanny Arroyo-Arce, Ian Thomson, and Joel S谩nez. <a href="https://acrobat.adobe.com/id/urn:aaid:sc:US:9b2de7c7-9a5a-4ddb-8b3c-d0aa909a5e89">First Record of Consumption of Olive Ridley Sea Turtle by a Cougar</a>. <em>CATnews</em>. Autumn 2016.</li> <li>Luis G. Fonseca, Grettel A. Murillo, Len铆n Guadam煤z, Romeo M. Sp铆nola, Rold谩n A. Valverde. <a href="https://acrobat.adobe.com/id/urn:aaid:sc:US:d715b42b-aa26-41ae-87a2-98927b55f959">Downward But Stable Trend in the Abundance of Arribada Olive Ridley Sea Turtles (Lepidochelys olivacea) at Nancite Beach, Costa Rica (1971-2007)</a>. <em>Chelonian Conservation and Biology</em>. 2009.</li> </ul> <div class="caption"><img typeof="foaf:Image" src="/sites/default/files/styles/standard_page_full_column/public/Screen%20Shot%202020-07-10%20at%2010.54.03%20AM.png?itok=Kcp2PhHX" width="610" height="413" alt="" /> <br> An Olive Ridley turtle will be this jaguar's next meal (photo by Luis Fonseca).</div> <div class="caption"><img typeof="foaf:Image" src="/sites/default/files/styles/standard_page_full_column/public/Screen%20Shot%202020-07-22%20at%204.33.00%20PM.png?itok=1Ol__ijn" width="610" height="208" alt="" /><br> Photo, left: Turtle biologist Luis Fonseca L贸pez (left) and his assistant, Eduardo Rangell (right), on a promontory overlooking Nancite Beach. Photo, right: An Olive Ridley lays her eggs on an ACG beach (photos by Eric Palola and Luis Fonseca)</div> </div></div></div> </div> </div> </div> </div> </section> <section class="column column-second column-alpha clearfix"> <div class="panel-pane pane-menu-tree pane-main-menu second-level-menu" > <h2 class="pane-title"> What We Support </h2> <div class="pane-content"> <div class="menu-block-wrapper menu-block-ctools-main-menu-1 menu-name-main-menu parent-mlid-main-menu-0 menu-level-2"> <ul class="menu"><li class="first expanded menu-mlid-743 menu-965"><a href="/bioinventory-building-library-life">Bioinventory of ACG</a><ul class="menu"><li class="first leaf menu-mlid-1685 menu-965"><a href="/terrestrial-parataxonomy">Terrestrial Parataxonomy</a></li> <li class="last leaf menu-mlid-1686 menu-965"><a href="/marine-parataxonomy">Marine Parataxonomy</a></li> </ul></li> <li class="expanded menu-mlid-744 menu-965"><a href="/education-biodevelopment">Education for Biodevelopment</a><ul class="menu"><li class="first leaf menu-mlid-753 menu-965"><a href="/biological-education-peb">Biological Education (PEB)</a></li> <li class="last leaf menu-mlid-754 menu-965"><a href="/marine-bioawareness">Marine Bioawareness</a></li> </ul></li> <li class="expanded menu-mlid-745 menu-965"><a href="/habitat-restoration">Habitat Restoration</a><ul class="menu"><li class="first leaf menu-mlid-751 menu-965"><a href="/expanding-acg" title="Short history of growth from 3 national parks to the present ACG.">Expanding ACG</a> <span class="description">Short history of growth from 3 national parks to the present ACG.</span></li> <li class="last leaf menu-mlid-752 menu-965"><a href="/land-management">Land Management</a></li> </ul></li> <li class="leaf menu-mlid-1677 menu-965"><a href="/bioalfa-bioliteracy-costa-rica">BioAlfa: Bioliteracy for Costa Rica</a></li> <li class="last expanded active-trail menu-mlid-1200 menu-965"><a href="/assisting-acg-biomanagement" class="active-trail">Assisting ACG Biomanagement</a><ul class="menu"><li class="first leaf active-trail active menu-mlid-1687 menu-965"><a href="/sea-turtle-and-jaguar-research" class="active-trail active">Sea Turtle and Jaguar Research</a></li> <li class="last leaf menu-mlid-1762 menu-965"><a href="/bird-research">Bird Research</a></li> </ul></li> </ul></div> </div> </div> </section> <section class="column column-main column-beta clearfix"> <div class="panel-pane pane-block pane-gdfcf-footer-gdfcf-footer" > <div class="pane-content"> <div id="gdfcf-bottom-footer"><div id="block-footer-sitemap-footer-sitemap" class="block block-footer-sitemap"> <h2>Site map</h2> <div class="content"> <div id="footer-sitemap" class="clearfix"> <div class="fs-block-content"><div class="main-menu"><ul class="footer_links_main-menu total-items-7 parent-items-0 single-items-0"><li class="menu-962 depth-1 total-children-4 parent-children-2 single-children-2 first"><a href="/content/who-we-are" class="fs-root-link">Who We Are</a><ul 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