Download or read book Movements and Feeding Ecology of Immature Green Turtles Chelonia Mydas written by Mary T. Mendonca and published by . This book was released on 1981 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Observations on the Feeding Ecology of Immature Green Turtles Chelonia Mydas in the Moreton Banks Region of Moreton Bay South East Queensland written by Mark A. Read and published by . This book was released on 1991 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synopsis of the Biological Data on the Green Turtle Chelonia Mydas Linnaeus 1758 written by Harold F. Hirth and published by . This book was released on 1997 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Observations on the Feeding Ecology of the Green Turtle written by Jeanne A. Mortimer and published by . This book was released on 1976 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Life History and Environmental Requirements of Loggerhead Turtles written by David A. Nelson and published by . This book was released on 1988 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Life History and Environmental Requirements of Loggerhead Turtles written by David Arthur Nelson and published by . This book was released on 1988 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diet Characterization in Immature Neritic Green Turtles Chelonia Mydas Using Gut Contents and Stable Isotope Analyses written by Natalie Christine Williams and published by . This book was released on 2012 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent developments in open water research have refined our understanding of green turtle, Chelonia mydas, foraging ecology, but diet characterization among populations remains understudied. Previous hypotheses state that once young green turtles recruit to shallow water habitat they shift rapidly from an omnivorous to herbivorous diet. Supporting evidence has primarily been derived from traditional gut content analysis that only provides a small window in time to perceive the diet of an animal. In contrast, stable isotope analysis explore show a consumer uses its resources over a broad temporal scale. We tested the dietary shift hypothesis using gut content and stable isotope analyses to assess the nutritional ecology of a juvenile green turtle aggregation in the northern Gulf of Mexico. We examined the gut contents of 65 green turtles collected from 2008 and 2011 hypothermic stunning events in St. Joseph Bay, Florida. Gut contents were evaluated using volume, dry mass, percent frequency of occurrence, and index of relative importance (IRI). Juvenile green turtles showed omnivorous feeding behavior, feeding on a variety of animal and vegetal items with a bias towards seagrass and tunicates. In addition, we evaluated feeding consistency by stable isotope patterns from epidermis tissue. We measured the stable carbon (delta13C)and nitrogen (delta15N)isotope values in epidermis of 43 green turtles, ranging from 22.5 to 72.7cm in curved carapace length (CCLmin), and eight known prey items (e.g., algae, seagrasses, invertebrates) collected in 2011. Our study provides a foundation for characterizing the foraging ecology of green turtles in St. Joseph Bay and highlights the value of utilizing isotopic ecology for further foraging studies.
Download or read book The Biology of Sea Turtles Volume I written by Peter L. Lutz and published by CRC Press. This book was released on 2017-12-06 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sea turtles have existed for millions of years, making them fascinating subjects of study. In the last 20 years, the science of sea turtle biology has expanded at an exponential rate, leading to major advances in many areas. This book synthesizes the results of these advances and focuses on how these endangered marine reptiles operate in, adapt to, and are dependent upon particular features of their marine environment. New technology in data gathering, such as DNA analyses, remote sensing, and physiological monitoring techniques, has led to a much greater understanding of the biology of the sea turtle at all stages of their life history.
Download or read book 2000 IUCN Red List of Threatened Species written by Craig Hilton-Taylor and published by IUCN. This book was released on 2000 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Release of the 2000 Red List is a major landmark for IUCN. It is the first time that listings of animals and plants have been combined and the first time that the Red List has been produced on CD-ROM. The 2000 Red List combines new assessmentsincluding all bird species, many antelope and bat species, most primates and sharks, all Asian freshwater turtles, more molluscs, and many otherswith those from previous publications. The combination of animals and plants into a single list containing assessments of more than 18,000 taxa (11,000 of which are threatened species) and the move towards improved documentation of each species on the list means that a hard-copy version of the Red List would run to several volumes. This, combined with the fact that the Red List will be updated annually, led to the decision to release the Red List in electronic format, via the World Wide Web and as a CD-ROM.
Download or read book Juvenile Green Turtle Chelonia Mydas Foraging Ecology written by Eliza Inez Gilbert and published by . This book was released on 2005 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the endangered green turtle, Chelonia mydas, a fundamental component of recovery and conservation is an understanding of its foraging ecology. Foraging optimality models suggest animals will select resources of high quality over those of low quality. For green turtles, this behavior is important, as sufficient quantities of nutritionally adequate forage items are necessary for growth and reproduction. One intrinsic element in the understanding of green turtle foraging ecology is to identify and document the availability and quality of forage resources preferred by green turtles.
Download or read book Ecology and Conservation of Immature Sea Turtles Across Multiple Scales written by Lucas Griffin and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Considering many sea turtle populations are a fraction of their historic size and anthropogenic threats within the marine environment are increasing, additional data are imperative to help mitigate anthropogenic disturbances and to build resilience into sea turtle populations. In this dissertation, I present three data chapters focused on immature sea turtle ecology and conservation. These chapters evaluate sea turtle ecology and conservation at varying scales, ranging from mitigating human-wildlife interactions at the individual level, to coastal movements and space use at the ecosystem level, and to large scale climate change impacts at the population level. Ultimately, these chapters provide a better understanding of immature turtle behavioral and spatial ecology within nearshore waters that are required for the continued conservation of turtles and their habitats. In Chapter 2, following Chapter 1: General Introduction, I quantified the behavioral response of immature green turtles (Chelonia mydas) to disturbance by snorkelers in a popular ecotourism venture on Culebra Island, Puerto Rico, United States. Using a standardized disturbance stimulus, I evaluated whether turtles have individual-level responses to snorkeler disturbance. I found ninety percent of turtles disturbed by snorkelers initiated their fights at distances of 3 m or less. Thus, I recommended snorkelers remain greater than 3 m distance from immature turtles. In addition, I found a significant intra-individual repeatability in behavioral responses to disturbance, suggesting, ecotourism activities may be disproportionally affecting individual turtles depending on their personality type. Finally, I suggest ecotourism activities be temporally and spatially stratified and better regulated to reduce missed foraging opportunities by immature turtles in important foraging areas. In Chapter 3, I used acoustic telemetry to describe movement patterns and connectivity of immature green turtles on Culebra and Culebrita Islands, Puerto Rico and, secondly, to determine the spatial-temporal drivers of presence and absence of turtles. Network analysis revealed high fidelity within bays with little to no connectivity across the islands. Based on these findings, I provided evidence that habitat quality and availability in combination with predation risk (innate or learned) is likely driving different rates of somatic growth across the island. Using a presence-absence Bayesian model, results indicated turtles occupied areas of lagoon and seagrass habitats at night, and were rarely using areas of macroalgae habitat. The parameter estimates from the model enabled me to predict diel movement patterns and space use across the focal bay. While habitatswithin Culebraare still largely intact, coastal embayments are becoming increasingly threatened. Given that my research showed that turtles in Culebra exhibit high fidelity within the bays, it is imperative to protect these distinct habitats that serve as both shelter and foraging areas. In Chapter 4, I examined the oceanic, atmospheric, and biological factors that may affect the increasing trend of cold-stunned immature Kemp's ridleys (Lepidochelys kempii) in Cape Cod Bay, Massachusetts, United States. Using cold-stunned data collected since the early 1980's and analytical methods, such as machine learning algorithms and Bayesian modeling, I demonstrated higher cold-stunning years occurred when the Gulf of Maine has warmer seas surface temperature (SST) in late October through early-November. Hatchling numbers, a proxy for population abundance, was not identified as an important factor in predicting the number of annual cold-stunning strandings. Further, I predicted the potential annual cold-stunning counts out to 2031 based on the increasing Gulf of Maine SSTs and evaluated the population level effects of future cold-stunning events in the face of climate change. While cold-stunning at the population level may be minimal, I recommend the continued efforts to rehabilitate cold-stunned turtles to maintain population resilience for this critically endangered species. For the fifth, and final chapter, I synthesized these findings in the context of contributions to the greater field of sea turtle conservation and management, propose future research directions, and re-visit caveats of these studies. Within this chapter, each data chapter is revisited to provide direct conservation applications to help mitigate anthropogenic disturbances. In Chapter 2, I suggest alternate ecotourism regulations and advocate for the spatial-temporal stratification of green turtle snorkel tours. In Chapter 3, I highlight the differential space use of green turtles within coastal habitats and advocate for the importance and protection of these habitats to ensure recruitment into adult populations. And finally, in Chapter 4, I advise for the recovery and rehabilitation of cold-stunned Kemp's ridley turtles to provide population resilience for this critically endangered species in a changing world.
Download or read book The Biology of Sea Turtles written by Jeanette Wyneken and published by CRC Press. This book was released on 2013-03-25 with total page 479 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the first volume of The Biology of Sea Turtles was published in 1997, the field has grown and matured in ways few of the authors would have predicted—particularly in the areas of physiology, behavior, genetics, and health. Volume III presents timely coverage of emerging areas as well as the integration of approaches and information that did not exist even a decade ago. The book assembles the foremost experts in each topic to provide the most up-to-date and comprehensive book on sea turtles available today. New areas covered include in vivo imaging of structure, spatial distributions of marine turtles at sea, epibiosis, imprinting, parasitology, and climatic effects. Life history is explored in three chapters covering age determination, predator-prey interactions, and mortality from bycatch. The Biology of Sea Turtles, Volume III will inspire scientists and students to explore and expand their understanding of these intriguing animals. The book provides clear baseline summaries, thoughtful syntheses, and effective presentation of the most fundamental topics spanning form and function, health, distributions, behavior, genetics, evolution, and ecology. Its scope and depth make it the definitive go-to reference in the field.
Download or read book Fishery Bulletin written by and published by . This book was released on 1998 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Global Seagrass Research Methods written by F.T. Short and published by Elsevier. This book was released on 2001-11-06 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thorough and informative volume presents a set of detailed, globally applicable techniques for seagrass research.The book provides methods for all aspects of seagrass science from basic plant collection to statistical approaches and investigations of plant-animal interaction. The emphasis is on methods that are applicable in both developing and developed countries. The importance of seagrasses in coastal and near shore environments, and ultimately their contribution to the productivity of the world's oceans, has become increasingly recognised over the last 40 years.Seagrasses provide food for sea turtles, nearly 100 fish species, waterfowl and for the marine mammals the manatee and dugong. Seagrasses also support complex food webs by virtue of their physical structure and primary production and are well known for their role as breeding grounds and nurseries for important crustacean, finfish and shell fish populations. Seagrasses are the basis of an important detrital food chain. The plants filter nutrients and contaminants from the water, stabilise sediments and act as dampeners to wave action. Seagrasses rank with coral reefs and mangroves as some of the world's most productive coastal habitat and strong linkages among these habitats make the loss of seagrasses a contributing factor in the degradation of the world's oceans. Contributors from around the world provide up-to-date methods for comparable collection of ecological information from both temperate and tropical seagrass ecosystems.
Download or read book Proceedings of the Ninth Annual Workshop on Sea Turtle Conservation and Biology 7 11 February 1989 Jekyll Island Georgia written by Scott A. Eckert and published by . This book was released on 1989 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biological Report written by and published by . This book was released on 1988 with total page 976 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Diet and Feeding Ecology of the Green Sea Turtle Chelonia Mydas in an Algal based Coral Reef Community written by Gregory Allan Forbes and published by . This book was released on 1996 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
