Download or read book Ringed Seal Pusa Hispida Population Trends Inferred from Genetics written by Kyle Ritchie and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Climate change is predicted to affect ringed seals negatively. The first objective of my thesis was to assess trends in abundance of ringed seals using genetics. I used genetic profiles to estimate the effective number of breeders (Nb) and assessed relationships with counts from aerial surveys (Ns). I did not detect a relationship between Nb and Ns or a temporal trend in either variable when the entire time series was assessed. However, Nb fluctuated over time, with a negative trend from 1983 to 1994 and becoming stable from 1995 to 2012. My second objective was to determine which variables predicted Nb. My analysis suggested that spring rainfall, snow depth, and the date of fall sea-ice freezeup had a greater influence on Nb than the timing of spring breakup. This research helps address the lack of long-term monitoring data for ringed seals, while improving our understanding of population dynamics.
Download or read book Biology of the Ringed Seal Phoca Hispida in Alaska 1960 2010 written by Lori Trent Quakenbush and published by . This book was released on 2011 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Alaska Department of Fish and Game (ADF&G) has been monitoring the health and status of ringed seals (Phoca hispida) in Alaska since 1960 by collecting information and samples from the Alaska Native subsistence harvest. This monitoring program is especially important because agencies are unable to overcome the logistical and sampling constraints necessary to estimate seal abundance in remote, ice covered waters. As such, reliable estimates of ringed seal abundance or population trend are lacking. Retrospective data analyses from this monitoring program allow us to examine how parameters that affect population size and status may vary in time and how current conditions compare with past conditions. Parameters we monitor that are indicative of population health or status include growth rate, body condition, diet, age distribution, sex ratio, age of maturation, and pregnancy rate. Since 2000, ADF&G has also conducted surveys for local knowledge and hunter preferences and analyzed tissue samples for contaminants and disease. All of these collections rely on the cooperation of coastal subsistence communities. Villages that have participated in the sampling program span the region from Hooper Bay in the Bering Sea to Kaktovik in the Beaufort Sea, including islands in the Bering Sea; an area that encompasses most of the range of ringed seals in Alaska.
Download or read book Conservation Biology of Saimaa Ringed Seal Phoca Hispida Saimensis with Reference to Other European Seal Populations written by Tero Sipilä and published by . This book was released on 2003 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Pacific Arctic Region written by Jacqueline M. Grebmeier and published by Springer. This book was released on 2014-06-10 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Pacific Arctic region is experiencing rapid sea ice retreat, seawater warming, ocean acidification and biological response. Physical and biogeochemical modeling indicates the potential for step-function changes to the overall marine ecosystem. This synthesis book was coordinated within the Pacific Arctic Group, a network of international partners working in the Pacific Arctic. Chapter topics range from atmospheric and physical sciences to chemical processing and biological response to changing environmental conditions. Physical and biogeochemical modeling results highlight the need for data collection and interdisciplinary modeling activities to track and forecast the changing ecosystem of the Pacific Arctic with climate change.
Download or read book Canadian Journal of Zoology written by and published by . This book was released on 1951 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agrindex written by and published by . This book was released on 1981 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Biology and Identification of the Coccidia Apicomplexa of Carnivores of the World written by Donald W. Duszynski and published by Academic Press. This book was released on 2018-06-29 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fundamental concept of The Biology and Identification of the Coccidia (Apicomplexa) of Carnivores of the World is to provide an up-to-date reference guide to the identification, taxonomy, and known biology of apicomplexan intestinal and tissue parasites of carnivores including, but not limited to, geographic distribution, prevalence, sporulation, prepatent and patent periods, site(s) of infection in the definitive and (if known) intermediate hosts, endogenous development, cross-transmission, pathology, phylogeny, and (if known) their treatments. These data will allow easy parasite recognition with a summation of virtually everything now known about the biology of each parasite species covered. The last (very modest) and only treatise published on this subject was in 1981 so this book fills a fundamental gap in our knowledge of what is now known, and what is not, about the coccidian parasites that infect and sometimes kill carnivores and/or their prey that can harbor intermediate stages, including many domestic and game animals. Offers line drawings and photomicrographs of many parasite species that will allow easy diagnosis and identification by both laypersons and professionals (veterinarians, wildlife biologists, etc.) Presents a complete historical rendition of all known publications on carnivore coccidia for all carnivore families and evaluates the scientific and scholarly merit of each apicomplexan species relative to the current body of knowledge Provides a complete species analysis and their known biology of all coccidia described from each carnivore lineage and species Reviews the most current taxonomy of carnivores and their phylogenetic relationships to help assess host-specificity patterns that may be apparent Evaluates what little cross-transmission work is available to help understand the complexities of those coccidians that use two hosts (e.g., Sarcocystis, Besnoitia, and others) Provides known treatments for the various parasite genera/species
Download or read book Ringed Seals in the North Atlantic written by North Atlantic Marine Mammal Commission and published by Tromsø [Norway] : North Atlantic Marine Mammal Commission. This book was released on 1998 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Whales Seals Fish and Man written by A. Schytte Blix and published by Elsevier. This book was released on 1995-10-06 with total page 735 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume outlines the major findings from the Norwegian research programme on whales and seals in Norwegian waters. A wide range of topics are covered, including physiological aspects, social organization, population dynamics, stock assessment and management. The book will be of great value to scientists and managers, as well as to members of the general public interested in environmental issues.
Download or read book Harp Seals Man and Ice written by David E. Sergeant and published by Fisheries and Oceans, Communications Directorate. This book was released on 1991 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reviews the biology and population dynamics of the harp seal, Phoca groenlandica Erxleben, the history of its hunting over several centuries and its eventual conservation.
Download or read book Biological Oceanography of the Baltic Sea written by Pauline Snoeijs-Leijonmalm and published by Springer Science & Business Media. This book was released on 2017-04-04 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first comprehensive science-based textbook on the biology and ecology of the Baltic Sea, one of the world’s largest brackish water bodies. The aim of this book is to provide students and other readers with knowledge about the conditions for life in brackish water, the functioning of the Baltic Sea ecosystem and its environmental problems and management. It highlights biological variation along the unique environmental gradients of the brackish Baltic Sea Area (the Baltic Sea, Belt Sea and Kattegat), especially those in salinity and climate. pt;font-family:"Arial","sans-serif"; color:#262626">The first part of the book presents the challenges for life processes and ecosystem dynamics that result from the Baltic Sea’s highly variable recent geological history and geographical isolation. The second part explains interactions between organisms and their environment, including biogeochemical cycles, patterns of biodiversity, genetic diversity and evolution, biological invasions and physiological adaptations. In the third part, the subsystems of the Baltic Sea ecosystem – the pelagic zone, the sea ice, the deep soft sea beds, the phytobenthic zone, the sandy coasts, and estuaries and coastal lagoons – are treated in detail with respect to the structure and function of communities and habitats and consequences of natural and anthropogenic constraints, such as climate change, discharges of nutrients and hazardous substances. Finally, the fourth part of the book discusses monitoring and ecosystem-based management to deal with contemporary and emerging threats to the ecosystem’s health.
Download or read book Bears of the World written by Vincenzo Penteriani and published by Cambridge University Press. This book was released on 2020-11-30 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bears have fascinated people since ancient times. The relationship between bears and humans dates back thousands of years, during which time we have also competed with bears for shelter and food. In modern times, bears have come under pressure through encroachment on their habitats, climate change, and illegal trade in their body parts, including the Asian bile bear market. The IUCN lists six bears as vulnerable or endangered, and even the least concern species, such as the brown bear, are at risk of extirpation in certain countries. The poaching and international trade of these most threatened populations are prohibited, but still ongoing. Covering all bears species worldwide, this beautifully illustrated volume brings together the contributions of 200 international bear experts on the ecology, conservation status, and management of the Ursidae family. It reveals the fascinating long history of interactions between humans and bears and the threats affecting these charismatic species.
Download or read book Euclidean Shortest Paths written by Fajie Li and published by Springer Science & Business Media. This book was released on 2011-11-03 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique text/reference reviews algorithms for the exact or approximate solution of shortest-path problems, with a specific focus on a class of algorithms called rubberband algorithms. Discussing each concept and algorithm in depth, the book includes mathematical proofs for many of the given statements. Topics and features: provides theoretical and programming exercises at the end of each chapter; presents a thorough introduction to shortest paths in Euclidean geometry, and the class of algorithms called rubberband algorithms; discusses algorithms for calculating exact or approximate ESPs in the plane; examines the shortest paths on 3D surfaces, in simple polyhedrons and in cube-curves; describes the application of rubberband algorithms for solving art gallery problems, including the safari, zookeeper, watchman, and touring polygons route problems; includes lists of symbols and abbreviations, in addition to other appendices.
Download or read book Cumulated Index Medicus written by and published by . This book was released on 1975 with total page 1210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology and Conservation of Pinnipeds in Latin America written by Gisela Heckel and published by Springer Nature. This book was released on 2021-03-28 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pinnipeds are marine mammals that include eared seals, true seals, and walruses. This book presents detailed reviews on the ecology and conservation of 10 pinniped species along the coasts and islands in Latin America, from Mexico to Chile and Argentina. Topics covered include their population dynamics, trophic ecology, reproduction, and behavior. In addition, the book addresses major conservation issues regarding climate change, interaction with fisheries, ecotourism, and other human activities.
Download or read book Advanced Concepts for Intelligent Vision Systems written by Jacques Blanc-Talon and published by Springer. This book was released on 2018-09-24 with total page 641 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 19th International Conference on Advanced Concepts for Intelligent Vision Systems, ACIVS 2018, held in Poitiers, France, in September 2018. The 52 full papers presented in this volume were carefully reviewed and selected from 91 submissions. They were organized in topical sections named: video analysis; segmentation and classification; remote sending; biometrics; deep learning; coding and compression; and image restauration and reconstruction.
Download or read book Biology of the Acanthocephala written by D. W. T. Crompton and published by Cambridge University Press. This book was released on 1985 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume was first published in 1985. A knowledge of this phylum of parasitic worms is instructive for all research workers investigating the principles of parasitism.
