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Variation In Genetic Structure And Dispersal Of Juvenile Green Turtles, Gustavo Stahelin
Variation In Genetic Structure And Dispersal Of Juvenile Green Turtles, Gustavo Stahelin
Electronic Theses and Dissertations, 2020-
Sea turtles are long-lived, globally distributed animals with a complex life-history. Individuals from different populations often share the same foraging areas (mixed stock aggregations). Understanding patterns of dispersal and connectivity between reproductive populations and mixed stock aggregations is fundamental for the development of effective conservation plans. Recently, green sea turtle (Chelonia mydas) populations in several reproductive areas have increased, providing an opportunity to evaluate how demographic changes in reproductive areas impact dispersal to, and the composition of, mixed stock aggregations. In this dissertation, I evaluated how dispersal from reproductive populations in the Greater Caribbean to mixed stock aggregations may have …
Refining The Use Of Stable Isotope Analysis In Detecting Wildlife Laundering, Kevin Guilfoyle
Refining The Use Of Stable Isotope Analysis In Detecting Wildlife Laundering, Kevin Guilfoyle
Electronic Theses and Dissertations, 2020-
The international wildlife trade has caused significant declines in wild populations. Captive breeding can reduce the pressure on wild populations caused by overcollection, but if not properly monitored, wildlife laundering can lead to further population declines. Improving the forensic ability to detect wildlife laundering will assist in monitoring the wildlife trade and enforcing regulations, thereby aiding recovery of wild populations. Stable isotope analysis has grown in importance as a forensic tool, but improvements are needed. Here, stable isotope analysis (δ13C) on eggshells of captive bred and wild sourced island apple snails (Pomacea maculata) distinguished between the two; eggshells of captive …
Exploring Population Structure And Diversity Across Time In Population Of American Flamingos (Phoenicopterus Ruber), Jessica Folsom
Exploring Population Structure And Diversity Across Time In Population Of American Flamingos (Phoenicopterus Ruber), Jessica Folsom
Electronic Theses and Dissertations, 2020-
Dispersal and connectivity within a population often promotes overall diversity and adaptive potential, therefore a disruption of existing patterns of connectivity by local extinction can have significant consequences for the affected species. However, the extent of these impacts on recovery is not always known. American flamingos (Phoenicopterus ruber) present an ideal opportunity to investigate how changes in gene flow influence within population diversity and genetic structure over the span of a century for a recovering population. Flamingos were highly sought-after by hunters for their meat and feathers, and as a result, the Florida population was extirpated by the beginning of …
Behavioral, Morphological And Genetic Differentiation Among Populations Of Enyaliopsis, Laura Macamo
Behavioral, Morphological And Genetic Differentiation Among Populations Of Enyaliopsis, Laura Macamo
Electronic Theses and Dissertations, 2020-
The study of biodiversity is a fundamental part of the study of the ecosystem's function and stability and how changes in the habitat shape the interaction between species. In recent years, the classification of species benefited from the analysis of several types of data to aid the distinction of morphologically similar species. Enyaliopsis iaculator (Naskrecki and Guta, 2019) is a species endemic to central Mozambique. Different populations of E. iaculator were reported to exhibit differences in the time of the day the mating call is displayed, but no morphological differences were reported. Since call behavior tends to be species specific …
Evolutionary History And Adaptation To Salinity In American Alligators, John Konvalina
Evolutionary History And Adaptation To Salinity In American Alligators, John Konvalina
Electronic Theses and Dissertations, 2020-
Stressful environments can commonly be found at the edge of a species range and may be a driver for adaption in suboptimal environments. Furthermore, the edge of a species' range can expand and contract over time, resulting in multiple independent invasions of the same stressful habitat. Elucidating population genetic structure and demographic history can aid in determining the which geologic factors impact range distributions and when climatic changes occurred driving genetic patterns observed in contemporary populations. Moreover, populations at the edge of the species range may adapt to the stressful environments that occur at the range edge and exhibit genetic …