Current Search: migratory connectivity -- loggerhead turtle -- stable isotopes -- carbon -- nitrogen -- carry-over effects -- isoscapes (x)
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Title
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Migratory connectivity and carry-over effects in Northwest Atlantic loggerhead turtles (Caretta caretta, L.).
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Creator
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Ceriani, Simona, Weishampel, John, Ehrhart, Llewellyn, Walters, Linda, Quintana-Ascencio, Pedro, Roth, James, Valdes, Eduardo, University of Central Florida
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Abstract / Description
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Migration is a widespread and complex phenomenon in nature that has fascinated humans for centuries. Connectivity among populations influences their demographics, genetic structure and response to environmental change. Here, I used the loggerhead turtle (Caretta caretta, L.) as a study organism to address questions related to migratory connectivity and carry-over effects using satellite telemetry, stable isotope analysis and GIS interpolation methods. Telemetry identified foraging areas...
Show moreMigration is a widespread and complex phenomenon in nature that has fascinated humans for centuries. Connectivity among populations influences their demographics, genetic structure and response to environmental change. Here, I used the loggerhead turtle (Caretta caretta, L.) as a study organism to address questions related to migratory connectivity and carry-over effects using satellite telemetry, stable isotope analysis and GIS interpolation methods. Telemetry identified foraging areas previously overlooked for loggerheads nesting in Florida. Next, I validated and evaluated the efficacy of intrinsic markers as a complementary and low cost tool to assign loggerhead foraging regions in the Northwest Atlantic Ocean (NWA), using both a spatially implicit and spatially explicit (isoscapes) approach. I then focused on the nesting beaches and developed a common currency for isotopic studies based on unhatched eggs, which provide a non-invasive and non-destructive method for more extensive sampling to elucidate isotopic patterns across broader spatiotemporal scales. Lastly, I found that intra-population variations in foraging strategies affect annual and long-term reproductive output of loggerheads nesting in Florida. Understanding geospatial linkages is critical to the fostering of appropriate management and conservation strategies for migratory species. My multi-faceted approach contributes to the growing body of literature exploring migratory connectivity and carry-over effects.
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Date Issued
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2014
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Identifier
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CFE0005470, ucf:50390
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/ucf/fd/CFE0005470
