Author : John P. Croxall
Publisher :
Page : 224 pages
File Size : 35,23 MB
Release : 1987
Category : Northern fur seal
ISBN :
14 species summaries, 12 contributed papers and 5 rapporteurs' reports on fur seals throughout the world including the Pribilof Islands and Antarctica.
Author : Roger Kirkwood
Publisher : CSIRO PUBLISHING
Page : 211 pages
File Size : 42,88 MB
Release : 2013-06-12
Category : Science
ISBN : 0643109846
Fur seals and sea lions are charismatic, large carnivores that engage us with both their skill and playful antics. Although all species in Australian waters were harvested to near extinction 200 years ago, fur seals are recovering and are now common in near-shore waters across southern Australia. Sea lions, however, are endangered. Their populations appear not to have recovered like fur seals and are declining at some locations. Fur seals and sea lions are important top level predators and play an important role in Australia’s temperate marine ecosystems. Key threats they currently face relate to human activities, particularly interactions with fisheries. This book outlines the comparative evolutionary ecology, biology, life-history, behaviour, conservation status, threats, history of human interactions and latest research on the three species of otariids that live in the waters of southern Australia: the Australian fur seal, New Zealand fur seal and Australian sea lion. It also includes brief descriptions of Antarctic and Subantarctic seals that occupy the Antarctic pack-ice and remote Australian territories of Macquarie Island and Heard Island.
Author : Roger L. Gentry
Publisher : Princeton University Press
Page : 409 pages
File Size : 18,82 MB
Release : 2014-07-14
Category : Science
ISBN : 1400864720
Covering the behavior and ecology of the northern fur seal, this book is a model long-term study of marine mammals, one that tests theory through both observation of undisturbed behavior and manipulative experiments on individuals. Here Roger Gentry draws on nearly two decades of research on three different islands to show how behavior among these seals changes with population size, sex ratio, and environment, to explain the behavior of the population beginning with individuals, and to generalize the results to other members of the eared seal family. In so doing, he offers one of the most comprehensive studies of its kind on any marine mammal species to date. Gentry shows that the species is driven by very different behavioral traits than have been assumed for it in the past. His book analyzes behavior on scales of hours to lifetimes, investigates the mating system, considers processes that underlie the mating system (site fidelity, behavioral estrus, and the development of territoriality), and addresses specific aspects of maternal strategy (female attendance behavior, pup growth, seasonal influences, and the effects of continental shelf width). Gentry contributes to knowledge about marine mammals by providing a very specific basis for interspecies comparisons, and he suggests a link between population trend and environmental regime shifts. He also guides the debate over seal mating systems from an interpretive to an empirical or experimental basis. Originally published in 1997. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.
Author : Pierre-Henry Fontaine
Publisher : Schiffer Publishing
Page : 452 pages
File Size : 42,77 MB
Release : 2007
Category : Nature
ISBN :
Very few people can claim to know as much about whales and the seals as Pierre-Henry Fontaine. His secret lies in a boundless passion for these marine mammals. To understand this, it is necessary to imagine the author climbing inside the belly of a stranded Blue whale, to find and to show you his aorta. That he will do this is a reflection of his concern for marine mammals and educating the world about them that is so clearly seen in this work. This exciting new edition of a classic reference about marine mammals is enriched and expanded, presenting recent and new information, accompanied by many diagrams and illustrations. In addition to new information on whales, expanded chapters present the anatomy, physiology and the ecology of the pinnipeds, with expansive fact sheets of some species of seals and Walrus. This is a detailed picture of the lives and environments of whales and seals, including chapters on anatomy, adaptation to aquatic life, nutrition, migration, reproduction, and parasites and enemies. The interaction of man with these marine animals is also explored, as is their paleontology. New information and 678 color diagrams and illustrations help illuminate the lives of these mysterious animals. Fact sheets on Mysticetes, Odontocetes, and Pinnipeds, a glossary, and an extensive bibliography provide additional information essential to the study of whales and seals, leaving the reader more fully informed. With this book, all readers, from the curious to the scientist, will find much to further their knowledge of, and fire their passions for, these impressive denizens of the deep. Book jacket.
Author : Marianne Riedman
Publisher : Univ of California Press
Page : 515 pages
File Size : 11,1 MB
Release : 2023-12-22
Category : Science
ISBN : 0520320085
This title is part of UC Press's Voices Revived program, which commemorates University of California Press’s mission to seek out and cultivate the brightest minds and give them voice, reach, and impact. Drawing on a backlist dating to 1893, Voices Revived makes high-quality, peer-reviewed scholarship accessible once again using print-on-demand technology. This title was originally published in 1990. This title is part of UC Press's Voices Revived program, which commemorates University of California Press’s mission to seek out and cultivate the brightest minds and give them voice, reach, and impact. Drawing on a backlist dating to 1893, Voices Revived
Author : Burney J. Le Beouf
Publisher : Univ of California Press
Page : 434 pages
File Size : 41,5 MB
Release : 2022-07-15
Category : Nature
ISBN : 0520368177
The largest of all seals, elephant seals rank among the most impressive of marine mammals. They are renowned for their spectacular recovery from near-extinction at the end of the nineteenth century when seal hunters nearly eliminated the entire northern species. No other vertebrate has come so close to extinction and made such a complete recovery. The physiological extremes that elephant seals can tolerate are also remarkable: females fast for a month while lactating, and the largest breeding males fast for over one hundred days during the breeding seasons, at which times both sexes lose forty percent of their body weight. Elephant seals dive constantly during their long foraging migrations, spending more time under water than most whales and diving deeper and longer than any other marine mammal. This first book-length discussion of elephant seals brings together worldwide expertise from scientists who describe and debate recent research, including the history and status of various populations, their life-history tactics, and other findings obtained with the help of modern microcomputer diving instruments attached to free-ranging seals. Essential for all marine mammalogists for its information and its methodological innovations, Elephant Seals will also illuminate current debates about species extinctions and possible means of preventing them. This title is part of UC Press's Voices Revived program, which commemorates University of California Press’s mission to seek out and cultivate the brightest minds and give them voice, reach, and impact. Drawing on a backlist dating to 1893, Voices Revived makes high-quality, peer-reviewed scholarship accessible once again using print-on-demand technology. This title was originally published in 1994.
Author : D. Renouf
Publisher : Springer Science & Business Media
Page : 424 pages
File Size : 43,43 MB
Release : 2012-12-06
Category : Science
ISBN : 9401131007
We teach our students of behavioural science that one first defines a research problem, and then the most appropriate animal is selected to investigate hypotheses. The reverse order of events is improper: a particular class of animals should not be studied for its own sake. In the case of the Pinnipeds (seals, sea lions, fur seals and walruses) the organism and the problem are essentially the same. The research questions presented in this volume in one way or another relate to survival in two worlds, the ocean for foraging, and the terrain at its edge or frozen above it for breeding. The evolution of Pinniped behaviour and the mechanisms which underlie it are a consequence of having to cope with two seemingly incompatible sets of environmental constraints. The physiological adaptations for concomitant functioning in two media with very different physical characteristics have produced correlated behav ioural modifications. The energetic demands of reproduction and foraging are idiosyncratic because each activity occurs on opposite sides of the air/water interface. As a result, the mating system must reconcile aquatic design for such functions as locomotion and thermoregulation, with the terrestrial requirements for successful pupping. Similarly, the ecology of this dual habitat prescribes the rules governing the behaviour of the neonate and its interactions with its mother.
Author : Roger L. Gentry
Publisher : Princeton University Press
Page : 311 pages
File Size : 47,68 MB
Release : 2014-07-14
Category : Pets
ISBN : 1400854695
The contributors to this volume have accomplished a breakthrough in our ability to collect data on ocean-dwelling mammals. In the first large-scale comparison of fur seals, they have employed quantitative methods and a special instrument called a Time-Depth-Recorder to study the strategies used by females in six species of cared seals to rear and wean their young in different environments. Originally published in 1986. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.
Author :
Publisher :
Page : 846 pages
File Size : 32,24 MB
Release : 1984
Category : Fisheries
ISBN :
Author :
Publisher :
Page : 402 pages
File Size : 45,99 MB
Release : 2004
Category :
ISBN :
