Download or read book Implications of Hatchling Sex Ratios and Survival in the Recovery Program for the Endangered Kemp s Ridley Sea Turtle written by Elizabeth Bevan (Biologist) and published by . This book was released on 2013 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Kemp's ridley (Lepidochelys kempii) sea turtle neared extinction during the mid-1980s, but due to intense conservation efforts its population is now gradually recovering. Hatchling sex ratios and natural predation on nests and hatchlings have been monitored at Rancho Nuevo, Mexico to optimize this species' recovery. Sand and nest temperatures were evaluated for the 2009-2012 nesting seasons in the egg corrals and on the nesting beach. Temperatures were cool during the start of the nesting seasons (i.e. below pivotal temperature), and gradually rose and were at or above pivotal temperatures by mid-May. Temperatures remained warm for the remainder of the nesting seasons, except when tropical weather systems impacted the area and lowered incubation temperatures. Thus, a female bias was predicted from 2009 -2012, but some nests early in the nesting season or those subjected to tropical weather systems during the middle third of incubation 2012 nesting seasons in the egg corrals and on the nesting beach. Temperatures were cool during the start of the nesting seasons (i.e. below pivotal temperature), and gradually rose and were at or above pivotal temperatures by mid-May. Temperatures remained warm for the remainder of the nesting seasons, except when tropical weather systems impacted the area and lowered incubation temperatures. Thus, a female bias was predicted from 2009 -2012, but some nests early in the nesting season or those subjected to tropical weather systems during the middle third of incubation were predicted to produce males. The nesting beach was also warm (suggesting a female bias) but it was cooler than the egg corrals. Sex ratios for the egg corrals and nesting beach were recalculated using incubation temperatures that were raised by 1 degree C to hypothetically simulate the effects of increasing global temperatures on hatchling sex ratios. Increases in sand temperatures due to global climate change could result in extreme female biases for the egg corrals and the nesting beach. Subsets of in situ nests from arribadas in 2011 and 2012 were monitored for predation throughout incubation and hatching success was determined following emergence. Predation on in situ nests was low and hatching success relatively high. Additionally, survival of hatchlings during seafinding was evaluated for in situ nests in 2012 and results suggest relatively high survival rates. Evaluation of predation data supports the concept that arribadas may achieve predator satiation, thus enhancing nest and hatchling survival. Leaving arribada nests in situ may be an effective conservation strategy. These sex ratio and predation studies provide data to facilitate an effective transition from the use of egg corrals back to the use of the natural nesting beach as the Kemp's ridley recovers.
Download or read book Biology and Conservation of Ridley Sea Turtles written by Pamela T. Plotkin and published by JHU Press. This book was released on 2007-03 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here Plotkin and her colleagues reveal the nature of these species and the steps needed to make sure they remain a permanent part of the marine environment.
Download or read book Review of the Kemp s Ridley Sea Turtle Headstart Program written by and published by . This book was released on 1994 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Department of the Interior and related agencies appropriations for 1986 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of the Interior and Related Agencies and published by . This book was released on 1985 with total page 1616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evolutionary and Conservation Implications of Sex Determination and Hatchling Depredation in Kemp s Ridley Sea Turtles written by Anne Marie LeBlanc Eich and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recovery Plan for Marine Turtles written by Sally R. Hopkins and published by . This book was released on 1984 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Department of Defense Appropriations for 1985 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Dept. of Defense and published by . This book was released on 1984 with total page 1432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Petroleum on the Development and Survival of Marine Turtle Embryos written by Thomas H. Fritts and published by . This book was released on 1982 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sea turtles in the Mediterranean Distribution threats and conservation priorities written by Paolo Casale and published by IUCN. This book was released on 2010 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Leatherback Turtle written by James R. Spotila and published by JHU Press. This book was released on 2015-10-30 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most comprehensive book ever written on leatherback sea turtles. Weighing as much as 2,000 pounds and reaching lengths of over seven feet, leatherback turtles are the world’s largest reptile. These unusual sea turtles have a thick, pliable shell that helps them to withstand great depths—they can swim more than one thousand meters below the surface in search of food. And what food source sustains these goliaths? Their diet consists almost exclusively of jellyfish, a meal they crisscross the oceans to find. Leatherbacks have been declining in recent decades, and some predict they will be gone by the end of this century. Why? Because of two primary factors: human redevelopment of nesting beaches and commercial fishing. There are only twenty-nine index beaches in the world where these turtles nest, and there is immense pressure to develop most of them into homes or resorts. At the same time, longline and gill net fisheries continue to overwhelm waters frequented by leatherbacks. In The Leatherback Turtle, James R. Spotila and Pilar Santidrián Tomillo bring together the world’s leading experts to produce a volume that reveals the biology of the leatherback while putting a spotlight on the conservation problems and solutions related to the species. The book leaves us with options: embark on the conservation strategy laid out within its pages and save one of nature’s most splendid creations, or watch yet another magnificent species disappear.
Download or read book Department of the Interior and Related Agencies Appropriations for 1986 Justification of the budget estimates written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of the Interior and Related Agencies and published by . This book was released on 1985 with total page 1432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recovery Plan for the Kemp s Ridley Turtle Lepidochelys Kempii written by and published by . This book was released on 1992 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Biology of Sea Turtles Volume II written by Peter L. Lutz and published by CRC Press. This book was released on 2002-12-17 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: The success of the first volume of The Biology of Sea Turtles revealed a need for broad but comprehensive reviews of major recent advances in sea turtle biology. Biology of Sea Turtles, Volume II emphasizes practical aspects of biology that relate to sea turtle management and to changes in marine and coastal ecosystems. These topics i
Download or read book Research and Management Techniques for the Conservation of Sea Turtles written by and published by . This book was released on 1999 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sea Turtle Research and Conservation written by Brad Nahill and published by Academic Press. This book was released on 2020-11-27 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sea Turtles: Field Research and Conservation is a comprehensive reference of experiences with sea turtle species from global experts. This book looks at the human side of protecting and studying these unique animals around the world, as well as the challenges involved, such as cultural differences and conducting research in remote locations.Led by a renowned expert in sea turtle conservation, this book addresses the largest issue facing sea turtle species currently; nearly all species of sea turtles are endangered due to poaching, fishing snares, climate change, and more. Chapters in this book range from the use of cutting-edge technology to learn more about this elusive reptile, to working with communities with long histories of sea turtle trade and consumption. It provides readers with firsthand accounts of sea turtle conservation efforts from conservationists based around the world and offers important suggestions and solutions for ensuring the future of these sea turtle species.Sea Turtles: Field Research and Conservation is the ideal resource for field biologist and marine conservationists, specifically those working in marine herpetology and with sea turtle species. Policymakers concerned with marine conservation, wildlife protection, and sustainable development, will also find this a useful reference for efforts and directions to enact change and save sea turtles from extinction. - Offers examples of groundbreaking technology to conduct noninvasive sea turtle research - Written by global experts working in the field to study and protect sea turtle species - Includes human-to-human case studies and advice for collaborating with cultures and communities to save these endangered animals
Download or read book Assessment Update for the Kemp s Ridley and Loggerhead Sea Turtle Populations in the Western North Atlantic written by and published by . This book was released on 2000 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recovery Plan for the Kemp s Ridley Sea Turtle Lepidochelys Kempii written by U.S. Fish and Wildlife Service and published by . This book was released on 1992 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
