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Showing 1 to 20 of 30 for “"sea turtle"”.
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Characterization of Sea Turtle Nesting on the Upper Texas Coast
Nearly annual record Kemp?s ridley sea turtle (Lepidochelys kempii) nesting activity on the upper Texas coast (UTC; defined as beaches from Sabine Pass to Matagorda Peninsula), where scientifically verifiable nesting commenced in 2002, has occurred concurrently with recent exponential increases in …
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Effects of Heavy Metal Pollution on the Loggerhead Sea Turtle
Historically, heavy metal research on sea turtles has been focused on deceased specimens, limiting the ability to determine if the concentrations of heavy metals affected the health of the individuals. More recently, the collection and analysis of blood samples from live turtles has enabled the …
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Participation, social capital and gender in sea turtle conservation, northeast Brazil
"Increasing participation in conservation programs is viewed as necessary in today's world; however, more knowledge is needed regarding how to engage communities. This dissertation aims to deconstruct participation by exploring community-level social capital, gender differences, and their potential …
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Cascading Effects Of Predator Removal On The Ecology Of Sea Turtle Nesting Beaches
… and indirect effects of raccoon removal from sea turtle nesting beaches in east-central Florida during the summers of 2003 and 2004. Raccoon and ghost crab predation are among the highest causes of egg mortality for sea turtles in Florida and raccoons are intraguild predators of ghost crabs. …
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An Assessment of Sea Turtle, Marine Mammal and Seabird Bycatch in the Wider Caribbean Region
<p>Sea turtles, marine mammals and sea birds are vulnerable to higher mortality rates as a direct function of incidental capture (bycatch) in marine fisheries. Their migratory behavior exposes them to multiple fishing gear types and fishing practices and efforts to understand the rates of …
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Nesting in the Clouds: Evaluating and Predicting Sea Turtle Nesting Beach Parameters from Lidar Data
… sensors has opened up a wide field of research, which unfortunately largely remains dependent on coarse-scale image spatial resolution, particularly for habitat modeling. For habitat-specialized species, such data may not be sufficient to successfully capture the nuances of their …
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Using Environmental DNA Surveys to Assess Green Sea Turtle (Chelonia mydas) Presence in Mississippi and Louisiana
<p>The green sea turtle (<em>Chelonia mydas</em>) is listed as Endangered on the International Union for the Conservation of Nature Red List of Threatened Species, largely due to anthropogenic impacts. In Mississippi and Louisiana, it is known that <em>C. mydas</em> occur in these areas, yet the …
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Sea turtle bycatch by the U.S. Atlantic pelagic longline fishery: A simulation modeling analysis of estimation methods
… fisheries most affecting federally protected sea turtles (Crowder and Myers 2001, Witherington et al 2009). Bycatch by fisheries is considered the main anthropogenic threat to sea turtles (NRC 1990). Accurate and precise bycatch estimates are imperative for sea turtle conservation and …
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Assessing sea turtle, seabird and shark bycatch in artisanal, semi-industrial and industrial of fisheries in the Cabo Verde Archipelago
Firstly, I am very grateful to Birdlife International for the MSc scholarship. I am also very grateful to Professor Peter Ryan of the FitzPatrick Institute of African Ornithology, University of Cape Town, for agreeing to supervise this project and for his guidance, insights and comments on the …
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The effect of beach renourishment on sea turtle nesting and hatching success at Sebastian Inlet State Recreation Area, East-Central Florida
… (Caretta caretta) and green (Chelonia mydas) sea turtles, is within the proposed Archie Carr National Wildlife Refuge and will play a critical role in the long-term maintenance of Sebastian Inlet as a navigable waterway. A turtle monitoring program was implemented by the District at the …
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Modeling and analysis of a three-species food web with facilitated and intraguild predation
… predation between two major loggerhead sea turtle nest predators, North American raccoons and Atlantic ghost crabs. Studies have also highlighted that ghost crab predation assists raccoons in finding nests (i.e., facilitated predation). However, the combined effects of these two …
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Maternal Plasma and Corresponding Egg Yolk Hormone Variation within a Clutch and Across the Nesting Season of the Loggerhead Sea Turtle (Caretta Caretta)
… vary among species, within and among clutches, seasonally, due to age, and in response to social and environmental cues. In previous studies, significant effects on hatchling phenotype, sex and survival have been attributed to a variation in egg yolk hormone levels. The differential allocation …
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Recreational Diving and Hawksbill Sea Turtles (Eretmochelys imbricata) in a Marine Protected Area
… the effects of recreational diving on sea turtles. I conducted in-water observations and turtle sightings surveys from June 9 to August 21, 2014, in Roatán, Honduras, to determine if differences in dive site use and diver behavior alter the behavior of critically endangered hawksbill …
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Reproductive success of sea turtles nesting on Wabasso Beach, East-Central Florida
… of 1988 and 1989, nests of 528 loggerhead sea turtles (Caretta caretta), 27 green sea turtles (Chelonia mydas), and 1 leatherback sea turtle (Dermochelys coriacea) were monitored on Wabasso Beach in Indian River County, Florida. Two hundred and forty four of the loggerhead and 2 of the …
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Incubators for Species which Exhibit Temperature-Dependent Sex Determination: Application to Hawksbill Sea Turtles in Rising Ambient Temperatures
… the case of the critically endangered Hawksbill Sea Turtles (Eretmochelys imbricata). Reportedly, 85-95% of Hawksbills sampled in the wild are currently female [3]. This sex-imbalance can negatively impact the species’ ability to procreate, leading to the potential for extinction. Currently, no …
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Development and application of a multistate model to the northern subpopulation of loggerhead sea turtles
Loggerhead sea turtles (Caretta caretta) are listed as threatened under the Endangered Species Act and are protected both on nesting beaches and in United States waters. Loggerhead sea turtles are long-lived species and are most easily studied on the beaches during the nesting season. Bald Head …
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Variation in Egg Components: A Study of Maternal Investment and Resource Partitioning in the Nesting Loggerhead Sea Turtle; Estimating Genic Variation and Mapping Genetic Lineage of a Rare Captive Helodermatid Population: <em>Heloderma Horridum Charlesbogerti</em>
<p>Loggerhead sea turtles have the highest egg yields of any oviparous non-avian reptiles. Blood urea nitrogen levels increased as the season progressed while total blood albumen and total protein levels decreased. Wet egg mass (H = 1.7719 df = 2 p = 0.0375*) and albumen mass (H = 6.0507 df = 2 p = …
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Mandalas and cultural identity: Increasing positive identification with Chamorro native heritage
<p>This graduate research study explored the effectiveness of adapting a traditional art directive of mandalas for use with individuals of Chamorro descent to develop positive identification with Chamorro native heritage. Fifty participants participated in the study; the majority were females who …
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Machine Learning and Geostatistical Approaches for Discovery of Weather and Climate Events Related to El Niño Phenomena
… by El Nino and marine heatwaves in nesting sea turtle habitats. Finally, expanding this study on ENSO yielded novel ways to analyze and understand the underlying processes driving unprecedented global heat waves and their association with ENSO.</p>
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