Download or read book Population Biology of Grey Seals halichoerus Grypus Fabricius 1791 in Western Ireland written by Oliver Roger Marieke Kiely and published by . This book was released on 1998 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: The population status and biology of grey seals was examined at principal breeding colonies in Ireland. A census of pup production at the Inishkea island group in 1995 and at the Blasket Islands in 1996/97 yielded all-age population estimates of 539-693 and 543-697 animals respectively, which are similar to previous population estimates for this area derived in 1983. Shore abundances were correlated between years and number of seals reached an annual peak during the annual moult. Adult males showed an annual immigration into the Inishkea Group but not to the Blasket Islands. Adult females showed a relatively consistent haul-out patterns through both years of the study. The proportions of males, females and juveniles ashore during the moult season were similar for each study area with males always present in higher numbers. The use of perennial haul-out sites by adult and juvenile grey seals was also examined in a two-year study. A strong effect of season on haul-out abundance was observed for adult females but not for adult males. Complete sex segregation did not occur among adults although a number of sights tended to be used by sex-biased groups. Photographic mark-recapture surveys of grey seals were conducted over a two-year period at three study areas in Ireland and at North Rona in western Scotland. Photo-identification of individual seals using automated pelage matching suggested that seasonal changes in abundance partly resulted from individual changes in site-use. No movements of identified individuals between study areas were detected. Individual recaptures suggested that females may show a level of interannual faithfulness to breeding areas. Population estimates derived from photo-identification data were significantly different from and less reliable than those derived from more traditional census methods.
Download or read book Encyclopedia of the Arctic written by Mark Nuttall and published by Routledge. This book was released on 2005-09-23 with total page 2306 pages. Available in PDF, EPUB and Kindle. Book excerpt: With detailed essays on the Arctic's environment, wildlife, climate, history, exploration, resources, economics, politics, indigenous cultures and languages, conservation initiatives and more, this Encyclopedia is the only major work and comprehensive reference on this vast, complex, changing, and increasingly important part of the globe. Including 305 maps. This Encyclopedia is not only an interdisciplinary work of reference for all those involved in teaching or researching Arctic issues, but a fascinating and comprehensive resource for residents of the Arctic, and all those concerned with global environmental issues, sustainability, science, and human interactions with the environment.
Download or read book Aspects of the Ecology of Grey Seals halichoerus Grypus and the Interactions Between Seals and Salmon salmo Salar Fisheries on the West Coast of Ireland written by Peter Coulahan and published by . This book was released on 2000 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diet and Blubber Fatty Acid Profile of Juvenile Grey Seals Halichoerus Grypus Fabricius 1791 written by Evelyn Philpott and published by . This book was released on 2001 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book FAO Fisheries Technical Paper written by and published by . This book was released on 1984 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Stocks of Grey Seals Halichoerus Grypus and Common Seals Phoca Vitulina in Great Britain written by W. Nigel Bonner and published by . This book was released on 1976 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards written by and published by . This book was released on 2000 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theses on any subject submitted by the academic libraries in the UK and Ireland.
Download or read book World Review of Interactions Between Marine Mammals and Fisheries written by Simon P. Northridge and published by Bernan Press(PA). This book was released on 1984 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summarizes available information on distribution, abundance, and feeding habits of cetacean, pinniped and sirenian mammals as well as information on interactions between these species and fisheries throughout the world. Catalog of marine mammal species, their population sizes, distributions, and diets is followed by area account of their interactions with fisheries.
Download or read book Marine Mammals Ashore written by Joseph R. Geraci and published by National Aquarium in Baltimore. This book was released on 2005 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive manual for understanding and carrying out marine mammal rescue activities for stranded seals, manatees, dolphins, whales, or sea otters.
Download or read book A Review of British Mammals written by Stephen Harris and published by . This book was released on 1995 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: This key report provides an estimate of current population size, trends, threats and conservation status for every terrestrial mammal in Britain, including feral and introduced species, a total of 64 species and one sub-species. In addition to detailed species accounts, there are comparative tables for pre-breeding population size, and status and protection of British mammals.
Download or read book The Teeth of Mammalian Vertebrates written by Barry Berkovitz and published by Academic Press. This book was released on 2018-08-10 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Teeth of Mammalian Vertebrates is an important reference for researchers in dentistry, comparative morphology, anthropology, and vertebrate palaeontology, and those with an interest in exploring and understanding diversity. The book provides a comprehensive and informed analysis of mammalian dentitions and highlights the importance of teeth as drivers and mirrors of evolution and diversity." - Journal of Anatomy The Teeth of Mammalian Vertebrates presents a comprehensive survey of mammalian dentitions that is based on material gathered from museums and research workers from around the world. The teeth are major factors in the success of mammals, and knowledge of tooth form and function is essential in mammalian biology. Illustrated with high-quality color photographs of skulls and dentitions, together with X-rays, CT images and histology, this book reveals the tremendous variety of tooth form and structure in mammals. Written by two internationally-recognized experts in dental anatomy, the book provides an up-to-date account of how teeth are adapted to acquiring and processing food. With its companion volume, this book provides a complete survey of the teeth of vertebrates. It is the ideal resource for students and researchers in zoology, biology, anthropology, archaeology and dentistry. - Provides a comprehensive account of mammalian dentitions, together with helpful reading lists - Illustrated by 900 high-quality photographs, X-rays, CT scans and histological images from leading researchers and world class museum collection - Depicts lateral and occlusal views of the skull and dentition, which conveys a much greater level of morphological detail than line drawings - Contains clear-and-concise, up-to-date reviews of the structure and properties of dental tissues, especially the enamel and tooth support system, both of which play vital roles in the functioning of the mammalian dentition
Download or read book Ecosystem Ecology Research Trends written by Junying Chen and published by Nova Publishers. This book was released on 2008 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecosystem ecology is the integrated study of biotic and abiotic components of ecosystems and their interactions within an ecosystem framework. This science examines how ecosystems work and relates this to their components such as chemicals, bedrock, soil, plants, and animals. A major focus of ecosystem ecology is on functional processes, ecological mechanisms that maintain the structure and services produced by ecosystems. These include primary productivity (production of biomass), decomposition, and trophic interactions. Studies of ecosystem function have greatly improved human understanding of sustainable production of forage, fibre, fuel, and provision of water. Functional processes are mediated by regional-to-local level climate, disturbance, and management thus ecosystem ecology provides a powerful framework for identifying ecological mechanisms that interact with global environmental problems, especially global warming and degradation of surface water. This book presents the latest developments in the field from around the world.
Download or read book Wildlife Comeback in Europe written by Stefanie Deinet and published by . This book was released on 2013 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marine Mammal Ecology and Conservation written by Ian L. Boyd and published by Oxford University Press. This book was released on 2010-08-12 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: Much of our knowledge about marine mammals is derived from a long-term and dedicated research effort that is evolving rapidly due to the introduction and invention of new methods.This book reflects the inventiveness of marine researchers as they try to find ways around the problems presented to them by these unusual and challenging animals.
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 Marine Mammals of the World A Comprehensive Guide to Their Identification written by Thomas Allen Jefferson and published by Elsevier. This book was released on 2011-08-29 with total page 589 pages. Available in PDF, EPUB and Kindle. Book excerpt: With coverage on all the marine mammals of the world, authors Jefferson, Webber, and Pitman have created a user-friendly guide to identify marine mammals alive in nature (at sea or on the beach), dead specimens "in hand, and also to identify marine mammals based on features of the skull. This handy guide provides marine biologists and interested lay people with detailed descriptions of diagnostic features, illustrations of external appearance, beautiful photographs, dichotomous keys, and more. Full color illustrations and vivid photographs of every living marine mammal species are incorporated, as well as comprehendible maps showing a range of information. For readers who desire further consultation, authors have included a list of literature references at the end of each species account. For an enhanced understanding of habitation, this guide also includes recognizable geographic forms described separately with colorful paintings and photographs. All of these essential tools provided make Marine Mammals of the World the most detailed and authoritative guide available!* Contains superb photographs of every species of marine mammal for accurate identification * Authors' collective experience adds up to 80 years, and have seen nearly all of the species and distinctive geographic forms described in the guide * Provides the most detailed and anatomically accurate illustrations currently available * Special emphasis is placed on the identification of species in "problem groups, such as the beaked whales, long-beaked oceanic dolphin, and southern fur seals * Includes a detailed list of sources for more information at the back of the book.
Download or read book Sea of Slaughter written by Farley Mowat and published by Douglas & McIntyre. This book was released on 2012 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: The northeastern seaboard of Canada and the United States, extending from Labrador to Cape Cod, was the first region of North America to suffer from human exploitation. Farley Mowat informs extensive historical and biological research with his direct experience living in and observing this region. When it was first published more than 20 years ago, Sea of Slaughter served as a catalyst for environment reform, raising awareness of the decline and destruction of marine and coastal species. Today, it remains a prescient environmental classic, serving, now as ever, as a haunting reminder of the impact of human interest on the natural world.
