Download or read book Estimated Size of the Northwest Atlantic Grey Seal Population 1977 2010 written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimated Size of the Northwest Atlantic Grey Seal Population 1977 2007 written by L. Thomas and published by . This book was released on 2008 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Marine Mammals written by Bernd Würsig and published by Academic Press. This book was released on 2017-11-27 with total page 1195 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Encyclopedia of Marine Mammals, Third Edition covers the ecology, behavior, conservation, evolution, form and function of whales, dolphins, seals, sea lions, manatees, dugongs, otters and polar bears. This edition provides new content on anthropogenic concerns, latest information on emerging threats such as ocean noise, and impacts of climate change. With authors and editors who are world experts, this new edition is a critical resource for all who are interested in marine mammals, especially upper level undergraduate and graduate students, researchers, and managers, and is a top reference for those in related fields, from oceanographers to environmental scientists. - Significant content and topic updates, as well as the addition of new topics in such areas as anthropogenic disturbance - Visual maps of the oceans and seas mentioned in contributions, helping to place the geographical features described in the text with clear, consistent species illustrations - Written to help users learn new information or brush up on a topic quickly, with the references at the end of each entry to help guide readers into more specialist literature
Download or read book The Devil and the Deep Blue Sea written by Linda Pannozzo and published by Fernwood Publishing. This book was released on 2023-01-03T00:00:00Z with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the early 1990s the collapse of the Atlantic groundfish stocks signaled the destruction of life in the seas, but it also threw 40,000 people out of work, unraveling the very fabric of rural life throughout Atlantic Canada. Twenty years later, even after fishing moratoriums and limited directed fishing, the cod have not recovered and some stocks are on the verge of biological extinction. The fishing industry, politicians and government scientists blame the growing population of grey seals – a species that had up until the 1970s been severely depleted – and argue that a large-scale cull of the population is needed to save the cod. In The Devil and the Deep Blue Sea, Linda Pannozzo finds that the truth is much more complex and that the seals are scapegoats for the federal government’s mismanagement of the cod stocks, deflecting attention away from the effects of global warming and the continued use of destructive fishing methods. The collapse of the cod, its failure to recover and the recent recommendations for large-scale grey seal culls are stark reminders of how fisheries, science and public policy are increasingly estranged from each other.
Download or read book Status of the Grey Seal Population in the Northwest Atlantic written by and published by . This book was released on 1983 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Assessment of the Northwest Atlantic Grey Seal Halichoerus Grypus Population for 1983 written by Kees Cornelis Tieleman Zwanenburg and published by . This book was released on 1984 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This document outlines an assessment of the Northwest Atlantic grey seal (Halichoerus grypus) population. The primary data source was a long-term, large-scale and recapture experiment which was initiated in 1977. Each year since 1977 all pups whelped on Sable Island (Nova Scotia) have been marked. Returns of these marks, via a bounty system, have allowed for estimates of total population pup production since 1977"--Abstract, page 2.
Download or read book Northwest Atlantic Grey Seal Population Trends 1960 2012 written by Michael O. Hammill and published by . This book was released on 2014 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gray Seals in Nantucket Sound Massachusetts Winter and Spring 1994 written by Valerie Rough and published by . This book was released on 1995 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Grey Seal Population Trends in Canadian Waters 1960 2016 and Harvest Advice written by M.O. Hammill and published by . This book was released on 2017 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessment of Population Consequences of Harvest Strategies for the Northwest Atlantic Grey Seal Population written by Len Thomas and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimating Pup Production and Population Size of Northwest Atlantic Harp Seal Phoca Groenlandica written by B. P. Healey and published by . This book was released on 2000 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study is to estimate current population size of Northwest Atlantic harp seals using an age structured population model, incorporating recent estimates of reproductive rates, unreported mortality, and pup production. Replacement yields (in units of total removals) and the corresponding levels of reported catch in the Canadian Front and Gulf that would provide such yields are calculated, assuming that other hunt components take the same number of animals as each component did in 1999. In addition, the study presents an estimate of population size in 2005 and 2010 if these replacement yields are taken in the intervening period. Uncertainty in these estimates was determined incorporating the error associated with the available pup production estimates.
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: Marine mammals command a high level of public attention, reflected in specific legislation for their protection and management in many countries. They also present particular challenges to ecologists and conservation biologists. They are mostly difficult to observe, they occupy an environment that is vast in its three dimensional extent, there are often perceived conflicts between marine mammals and people, and furthermore several species are now close to extinction. Marine mammals have some intriguing features in their biology - the ability to dive to crushing depths, to perform breath-hold dives that defy our current understanding of mammalian physiology, and many have an ability to hunt down prey using sophisticated sonar that we are only just beginning to understand. Many species also have complex social structures. We still have much to learn about these extraordinary animals so a comprehensive and authoritative overview of current methodology is now timely. The intention of this book is both to summarize the state-of-the-art and to encourage innovation and further progress in this research field.
Download or read book Model Estimates of Harp Seal Population Trajectories in the Northwest Atlantic written by Peter A. Shelton and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Update on Population Estimates of Harp Seal in the Northwest Atlantic written by and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimating Carrying Capacity and Population Trends of Northwest Atlantic Harp Seals 1952 2012 written by Michael O. Hammill and published by . This book was released on 2013 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: A population model was used to examine changes in the size of the Northwest Atlantic harp seal population between 1952 and 2012. The model incorporated information on reproductive rates, reported removals, estimates of non-reported removals and losses through bycatch in other fisheries to determine the population trajectory. The model was fit to eleven periodic estimates of pup production from 1952 to 2008, and to annual pregnancy rate data collected between 1954 and 2012. The harp seal (Pagophilus groenlandicus) assessment incorporates information on annual age specific reproductive rates, reported harvests, struck and loss, and ice-related mortality of young of the year (YOY), into an age-structured model to estimate total population size. The model is fitted to estimates of pup production obtained from aerial surveys and mark-recapture studies by adjusting the initial population size in 1952 and adult mortality rates.--Document.
Download or read book Stock Assessment of Northwest Atlantic Grey Seals Halichoerus Grypus written by Michael O. Hammill and published by . This book was released on 2008 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Feeding Ecology of the Northwest Atlantic Grey Seal Halichoerus Grypus microform written by Donald Benoit and published by National Library of Canada. This book was released on 1989 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
