Download or read book Spatial and Temporal Trends of Perfluorinated Compounds in Juvenile Loggerhead Sea Turtles Caretta Caretta Along the East Coast of the United States written by Steven Gehrig O'Connell and published by . This book was released on 2009 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: Perfluorinated compounds (PFCs) are globally distributed persistent environmental contaminants. This study provides temporal trends as well as large-scale spatial trends of PFC concentrations in threatened juvenile loggerhead sea turtles from Florida Bay, Florida, Cape Canaveral, Florida, Charleston, South Carolina, Core Sound, North Carolina, and Chesapeake Bay, Maryland. PFCs were extracted from 164 plasma and serum samples using solid-phase extraction and quantified with LC/MS/MS. Perfluorooctane sulfonate (PFOS) was the predominant compound detected in all loggerhead sea turtle samples (range 0.31 to 39.0 ng/g). Concentrations of six compounds significantly varied by location (≤0.01), with MD or FL Bay turtles having the highest PFC concentrations. FL turtles occupying inshore embayments had a higher proportion of perfluorocarboxylates compared to PFOS than other study sites. This study was the first to correlate wildlife PFC concentrations with human abundance; however, no significant correlation was found among study sites. PFOS and perfluorononanoate (PFNA) significantly decreased from 2000-2008 in the SC turtles (≤0.02) by 20% and 11%, respectively. PFOS and perfluorodecanoate (PFDA) were correlated to each other independent of region or year (r2 ≥0.50). Future investigations should continue temporal assessments as PFC regulations change and attempt to pinpoint specific sources and transport pathways in areas with higher PFC contamination.
Download or read book Proceedings of the Twenty eighth Annual Symposium on Sea Turtle Biology and Conservation written by and published by . This book was released on 2010 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Toxicological Effects of Perfluoroalkyl and Polyfluoroalkyl Substances written by Jamie C. DeWitt and published by Humana Press. This book was released on 2015-04-14 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book serves as a timely and comprehensive overview of the latest science for perfluoroalkyl and polyfluoroalkyl substances (PFASs), covering the development of methods for assessing PFASs in biological fluids and tissues as well as the current knowledge regarding their toxicity to vertebrate organisms. This book includes chapters on human and wildlife exposure/body burdens, reviews of metabolism and toxicological effects by organ system/developmental stage and aspects of PFAS toxicity that are driving PFAS research and regulatory oversight. Toxicological Effects of Perfluoroalkyl and Polyfluoroalkyl Substances provide critical assessments of the most controversial topics surrounding toxicological evaluation of PFASs to give readers an expert perspective on the issues. Emphasis is placed on the integration of modes and mechanisms of action with functional endpoints that are relevant to human and wildlife health. This book will be a useful resource for toxicologists, environmental chemists, risk assessors and researchers with an interest in the class of compounds known as perfluoroalkyl and polyfluoroalkyl substances.
Download or read book Issues in Environmental Economics Engineering and Technology 2011 Edition written by and published by ScholarlyEditions. This book was released on 2012-01-09 with total page 823 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issues in Environmental Economics, Engineering, and Technology: 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Environmental Economics, Engineering, and Technology. The editors have built Issues in Environmental Economics, Engineering, and Technology: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Environmental Economics, Engineering, and Technology in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Environmental Economics, Engineering, and Technology: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
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 2012 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Statistics for Censored Environmental Data Using Minitab and R written by Dennis R. Helsel and published by John Wiley & Sons. This book was released on 2012-02-01 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Praise for the First Edition " . . . an excellent addition to an upper-level undergraduate course on environmental statistics, and . . . a 'must-have' desk reference for environmental practitioners dealing with censored datasets." —Vadose Zone Journal Statistics for Censored Environmental Data Using Minitab® and R, Second Edition introduces and explains methods for analyzing and interpreting censored data in the environmental sciences. Adapting survival analysis techniques from other fields, the book translates well-established methods from other disciplines into new solutions for environmental studies. This new edition applies methods of survival analysis, including methods for interval-censored data to the interpretation of low-level contaminants in environmental sciences and occupational health. Now incorporating the freely available R software as well as Minitab® into the discussed analyses, the book features newly developed and updated material including: A new chapter on multivariate methods for censored data Use of interval-censored methods for treating true nondetects as lower than and separate from values between the detection and quantitation limits ("remarked data") A section on summing data with nondetects A newly written introduction that discusses invasive data, showing why substitution methods fail Expanded coverage of graphical methods for censored data The author writes in a style that focuses on applications rather than derivations, with chapters organized by key objectives such as computing intervals, comparing groups, and correlation. Examples accompany each procedure, utilizing real-world data that can be analyzed using the Minitab® and R software macros available on the book's related website, and extensive references direct readers to authoritative literature from the environmental sciences. Statistics for Censored Environmental Data Using Minitab® and R, Second Edition is an excellent book for courses on environmental statistics at the upper-undergraduate and graduate levels. The book also serves as a valuable reference for??environmental professionals, biologists, and ecologists who focus on the water sciences, air quality, and soil science.
Download or read book Movement Patterns and Marine Habitat Associations of Juvenile Loggerhead Sea Turtles Caretta Caretta in the Southwestern Atlantic Ocean written by Caren Barceló and published by . This book was released on 2011 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bycatch, or the incidental capture of non-target species, has been implicated as one of the main factors leading to population declines of many large marine vertebrates, including sea turtles. To effectively manage and conserve these long-lived species, their marine distribution, high use areas, foraging habitats, and regions of highest likelihood of interaction with fisheries must be understood. I analyzed the movements and habitat use of satellite tracked juvenile loggerhead sea turtles (Caretta caretta) in the Southwestern Atlantic Ocean, a poorly studied region with high turtle-fisheries interactions. Between July 2006 and March 2010, 27 satellite transmitters were deployed at sea on juvenile loggerheads captured as bycatch in the Uruguayan and Brazilian pelagic longline fishing vessels. I characterized the broad-scale behavioral patterns, inter-seasonal variability, and general high use areas for 26 juvenile turtles, which were tracked for 259±159 days between latitudes of 25-45°S and longitudes 35-54°W. The high use areas for the tracked turtles were over the continental shelf and slope within the Uruguayan and Brazilian Economic Exclusive Zones, and in oceanic international waters between the Rio Grande Rise and the continental slope off of southern Brazil. Diving information was available for 5 of the tagged turtles; the maximum dive depth recorded varied between 100-300m depths, and two turtles demonstrated potential bottom-feeding behaviors by diving to depths that corresponded with the bathymetry at their location. The mean sea surface temperature encountered by turtles was 19.8±2.3°C (10.21°C-28.4°C) and turtles showed an affinity for mesotrophic waters (0.458±1.012 mg/m3 chlorophyll-a). Overall, broad scale latitudinal movements of juvenile loggerheads varied by season and sea surface temperature. Because recent studies on marine megafauna movements have highlighted that ocean currents can have an important effect on movement paths, I decoupled active foraging behavior from likely passive movement of tracked juvenile loggerheads in ocean currents. Using First Passage Time analysis; a method to measure changes in movement patterns along a pathway through the environment, and generalized additive mixed models, I quantified similarities in the movement patterns and habitat "affinities" of the turtles and surface drifters in the ocean. Turtles and drifters both exhibited movement patterns that could be classified as likely "foraging behavior" at a spatial scale of 80km. This corresponds to the identified scale of eddies in the Southwestern Atlantic Ocean, which may suggest that passive movement of turtles in ocean currents largely drives their scale of search. Current velocity and sea floor depth were the most important variables correlated with both turtle and drifter movement patterns at that scale. Both turtles and drifters generally showed a negative relationship between first passage time and current velocities. Some differences between turtle and drifter behavior were evident, particularly on the continental shelf; deviations in turtle behavior from the patterns of drifters is likely indicative of active movement on the turtles part. There were no seasonal or annual effects on the fine scale movements of turtles or drifters. Interestingly, turtle search behavior was not correlated with temperature or chlorophyll a in this scale of analysis. I suggest that evaluation of drifter movements in the area of study is an important addition to satellite tracking work that attempts to identify foraging behavior in sea turtles or other large marine vertebrates that may take advantage of ocean currents for transport and feeding.
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 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessment of Organohalogen Contaminants in Benthic Juvenile Loggerhead Sea Turtles Caretta Caretta from Coastal North Carolina Including Method Development Blood Compartment Partitioning and Temporal Analysis with Emphasis on Polybrominated Diphenyl Ethers written by Brianna K. R. Carlson and published by . This book was released on 2006 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synopsis of the Biological Data on the Loggerhead Sea Turtle written by C. Kenneth Dodd and published by . This book was released on 1988 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spatial and Temporal Modeling of Sea Turtle Interactions with the Pelagic Longline Fishery in the Western North Atlantic written by Beth Gardner and published by . This book was released on 2007 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Occurrence and Diet of Juvenile Loggerhead Sea Turtles Caretta Caretta in the Northwestern Gulf of Mexico written by Pamela T. Plotkin and published by . This book was released on 1996 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Impact Research Program Life History and Environmental Requirements of Loggerhead Sea Turtles written by David A. Nelson and published by . This book was released on 1986 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the United States, scattered nestings of loggerhead sea turtles (Caretta caretta) may occur in most of its range from Texas to Florida and Florida to New Jersey; however, nesting concentrations occur on coastal islands of North Carolina, South Carolina, and Georgia and the coasts of Florida. The greatest portion of a loggerhead's life is spent in ocean and estuarine waters where they breed, feed, migrate, and hibernate. The remainder of their life is spent on coastal beaches where the female digs a nest and lays her eggs, the eggs hatch, and the hatchlings crawl to the water to become part of the aquatic system again. Mating is believed to occur in shallow water adjacent to nesting beaches just prior to nesting and egg laying. Nesting activity begins in the spring, peaks in midsummer, and declines until completion in late summer. A loggerhead female generally nests every other year or every third year. A small percentage nest at intervals less than 2 years or more than 3 years. When a loggerhead nests, it usually layes two to three cluthes of eggs per season (range one to five). Temperature is a major factor influencing sea turtle life histories. Sand temperature affects nest site selection by adult females, the incubation time and hatching success of eggs, and the sex and emergence timing of hatchlings, whereas water temperature affects nesting activity and movements of adults.
Download or read book Effects of the Thermal Environment on the Temporal Pattern of Emergence of Hatchling Loggerhead Turtles Caretta Caretta written by Kathleen L. Moran and published by . This book was released on 1998 with total page 212 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.
