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Author :
Publisher :
ISBN 13 :
Total Pages : 776 pages
Book Rating : 4.3/5 (91 download)
Download or read book Bulletin of the Bureau of Fisheries written by and published by . This book was released on 1935 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Randall W. Davis
Publisher : Springer
ISBN 13 : 9783030667986
Total Pages : 0 pages
Book Rating : 4.6/5 (679 download)
Download or read book Ethology and Behavioral Ecology of Sea Otters and Polar Bears written by Randall W. Davis and published by Springer. This book was released on 2022-07-05 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sea otters and polar bears are carnivorous marine mammals that still resemble their terrestrial ancestors. Compared with Cetacea (whales and dolphins), Sirenia (dugongs and manatees), and Pinnipedia (seals, sea lions, and walrus), they are less adapted for an aquatic life and the most recently evolved among marine mammals. Sea otters are amphibious but seldom come ashore, and polar bears primarily occur on sea ice or along the shore. When at sea, both species spend most of their time swimming at the surface or making short, shallow dives when foraging or pursuing prey. Indeed, polar bears rarely pursue seals in water. Nevertheless, polar bears are powerful swimmers and will stalk seals from the water. As with many other large carnivores, they are solitary hunters. Although sea otters are gregarious and form aggregations at sea called rafts, they are primarily asocial. Except during mating, the principal interaction among sea otters occurs between a female and offspring during the six-month dependency period. In large carnivores (e.g., wolves and lions) that feed on ungulates, sociality and cooperation are favored because of the need to capture large prey and defend carcasses. Polar bears, which are the largest terrestrial carnivore, are solitary hunters of seals and are neither gregarious nor social. Males and females briefly associate during courtship and mating. During this time, males aggressively compete for females. At other times, males generally avoid each other except for aggregations of males that form while summering on land, and females with cubs avoid males, which are known for infanticide. As with sea otters, the interaction of polar bears outside of mating occurs between a female and her offspring during the 2-3 year dependency period. This interaction is critically important when altricial cubs are born in the winter den. This book provides new insight into the ethology and behavioral ecology of sea otters and polar bears. Each chapter reviews the discoveries of previous studies and integrates recent research using new techniques and technology. The authors also address historic and current anthropogenic challenges for their survival as climate change alters entire marine ecosystems.
Author : Ben A. LePage
Publisher : Springer Science & Business Media
ISBN 13 : 9781402026317
Total Pages : 466 pages
Book Rating : 4.0/5 (263 download)
Download or read book The Geobiology and Ecology of Metasequoia written by Ben A. LePage and published by Springer Science & Business Media. This book was released on 2005-03-30 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: The plant fossil record indicates that the genus Metasequoia was widely distributed throughout the Northern Hemisphere from the early Late Cretaceous to the Plio-Pleistocene. Today the genus has shrunk to one species with approximately 5,000 mature individuals in southeastern China’s Xiahoe Valley. This book distills the current understanding of the biology, ecology and physiology of fossil and living Metasequoia, current research directions and problems that remain unresolved.
Author : George J. Ridgway
Publisher :
ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.3/5 (91 download)
Download or read book Blood Types in Pacific Salmon written by George J. Ridgway and published by . This book was released on 1960 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intraspecific differences in erythrocyte antigens (blood types) were shown to occur in four species of Pacific salmon, the sockeye or red salmon (Oncorhynchus nerka), the chinook or king salmon (O. tshawytscha), the chum salmon (O. keta), and the pink salmon (O. gorbuscha). Antisalmon-erythrocyte sera prepared in rabbits and chickens were used after absorption of species-specific antibodies. Some of these blood types were shown to differ in their frequency of occurrence between different geographic races. In addition, isoimmunizations were prepared and at least eight different patterns of antigenic composition were displayed by the cells tested. These results indicate that considerable antigenic diversity exists in salmon. Reagents to detect valuable markers for the investigation of geographic races of salmon should be obtained through further research.
Author : Peter W. Barnes
Publisher : Elsevier
ISBN 13 : 148326839X
Total Pages : 483 pages
Book Rating : 4.4/5 (832 download)
Download or read book The Alaskan Beaufort Sea written by Peter W. Barnes and published by Elsevier. This book was released on 2013-09-17 with total page 483 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Alaskan Beaufort Sea: Ecosystems and Environments provides an interdisciplinary view into almost all aspects of the environment, with a detailed survey of the background literature. This book focuses on the Alaskan Beaufort Shelf environment. Organized into four parts encompassing 20 chapters, this book begins with an overview of the characteristics and history of the region in which the research took place and defines the objectives of the studies program. This text then examines the subsynoptic meteorological networks along the Beaufort Sea coast and shelf. Other chapters consider the thermally generated mesoscale effects on surface winds and the orographic mesoscale effects on surface winds. This book discusses as well the phytoplankton associations and relative phytoplankton production in the area between the 20-m depth contour and the edge of the ice in summer. The final chapter deals with the characteristics of the ice cover and oil-ice interactions that will affect cleanup activities after blowout. This book is a valuable resource for scientists and conservationists.
Author : Syvliane Grant
Publisher :
ISBN 13 : 9780578248103
Total Pages : 369 pages
Book Rating : 4.2/5 (481 download)
Download or read book Dear Chairwoman, written by Syvliane Grant and published by . This book was released on 2021-04-09 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: DEDICATED TO THE NEXT GENERATION OF WOMEN BOARD LEADERSIn 2018, California passed a senate bill (SB 826) to require publicly held companies headquartered in CA to have at least one woman on their board by 2020. In 2020, Nasdaq proposed a mandate that would require listed companies to have at least two diverse board members with one member who identifies as female. Initiatives like these are helping advance gender parity on boards in many regions, not just the U.S. In late 2020, women held 22.6% of the board seats on the Russell 3000 for the first time, a 6.5 point jump over the past 4 years.Zooming out to the global scale, the picture is similarly improving. In 2020, about 23% of board seats globally were held by women, compared to 20% in 2018. Yet...at the time of this writing, 10% of large global companies do not have a single woman on their board. And the percent of women who chair boards is dramatically smaller. Among the largest 500 public U.S. companies by revenue the share of women who chaired boards remained stagnant at 7.4%. Notably, of those women who chair boards, few of them use the term Chairwoman in their bios or LinkedIn profiles-opting for monikers Chairman, or Board Chair, or occasionally Chairperson. This book features the extraordinary voices and stories of women leaders from around the world who have trailblazed to the board room, as letters to the next generation of women in business and government. With the salutation "Dear Chairwoman," these letters are infused with the energy to inspire young women to both pursue board governance early, and to claim the 'Chairwoman' title in taking the senior-most seat in the Board Room.
Download or read book Alaska Peninsula and Becharof, National Wildlife Refuges written by and published by . This book was released on 2003 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.3/5 (91 download)
Download or read book Rapid Counting of Nematoda in Salmon by Peptic Digestion written by and published by . This book was released on 1958 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. Indian Health Service. Office of Health Program Research & Development. Information Systems Division
Publisher :
ISBN 13 :
Total Pages : 56 pages
Book Rating : 4.3/5 (2 download)
Download or read book PCC Reports written by United States. Indian Health Service. Office of Health Program Research & Development. Information Systems Division and published by . This book was released on 1988 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Andrew P. Hendry
Publisher : Oxford University Press, USA
ISBN 13 : 019514385X
Total Pages : 521 pages
Book Rating : 4.1/5 (951 download)
Download or read book Evolution Illuminated written by Andrew P. Hendry and published by Oxford University Press, USA. This book was released on 2004 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work gives a critical overview on the evolution and population biology of salmon and their relatives. It should appeal to investigators in each of the scientific disciplines it integrates - evolutionary biology, ecology, salmonid biology, management and conservation. Variation in salmonids can be used to illustrate virtually all evolution.
Author : Thomas P. Quinn
Publisher : UBC Press
ISBN 13 : 0774842431
Total Pages : 392 pages
Book Rating : 4.7/5 (748 download)
Download or read book The Behavior and Ecology of Pacific Salmon and Trout written by Thomas P. Quinn and published by UBC Press. This book was released on 2011-11-01 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Behavior and Ecology of Pacific Salmon and Trout explains the patterns of mate choice, the competition for nest sites, and the fate of the salmon after their death. It describes the lives of offspring during the months they spend incubating in gravel, growing in fresh water, and migrating out to sea to mature. This thorough, up-to-date survey should be on the shelf of everyone with a professional or personal interest in Pacific salmon and trout. Written in a technically accurate but engaging style, it will appeal to a wide range of readers, including students, anglers, biologists, conservationists, legislators, and armchair naturalists.
Author : Food and Agriculture Organization of the United Nations
Publisher : Food & Agriculture Org.
ISBN 13 : 9789251046944
Total Pages : 180 pages
Book Rating : 4.0/5 (469 download)
Download or read book Dams, Fish and Fisheries written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2001 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance of free longitudinal passage of river fauna is stressed.
Author : G. Edward Griffin
Publisher : American Media (CA)
ISBN 13 :
Total Pages : 636 pages
Book Rating : 4.3/5 ( download)
Download or read book The Creature from Jekyll Island written by G. Edward Griffin and published by American Media (CA). This book was released on 1995 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Northern Rocky Mountain Wolf Recovery Team
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.3/5 (91 download)
Download or read book Northern Rocky Mountain Wolf Recovery Plan written by Northern Rocky Mountain Wolf Recovery Team and published by . This book was released on 1980 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Tyler Sharp
Publisher :
ISBN 13 : 9780999763803
Total Pages : pages
Book Rating : 4.7/5 (638 download)
Download or read book Modern Huntsman written by Tyler Sharp and published by . This book was released on 2018-02 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: By design, Volume One is of an introductory nature, which will help lay the foundation for the path ahead, and explain a bit more about where we're going. Our contributor list includes Charles Post (Guest Editor), Chris Douglas (Guest Editor), Jillian Lukiwski, John Dunaway, Eamon Waddington, Travis Gillett, Camrin Dengel, Kaleb White, Tanner Johnson, Nicole Belke and Dusan & Lorca Smetana, Adam Foss as well as stories from our Creative Director, Tyler Sharp, and a column from Simon Roosevelt.
Author : P. T. K. Woo
Publisher : Nova Science Publishers
ISBN 13 : 9781631175701
Total Pages : 0 pages
Book Rating : 4.1/5 (757 download)
Download or read book Salmon written by P. T. K. Woo and published by Nova Science Publishers. This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a good mix of both basic and applied topics in the hope that it will be useful and of interest to scientists working on finfish. It has 15 chapters written by 27 contributors and many of them are highly respected scientists. Given the global importance of salmon, contributors are from many countries including 11 from Japan and Russia. These authors bring slightly different and important perspectives to the book, and their expertise and research may not be known to many young scientists in Europe and in the Americas. The volume starts with an overview of salmon, their economic and social importance, and their impacts on the environment. Subsequent topics include morphological, physiological and behavioural differences between wild and farmed salmon; growth, food utilisation and water flow requirements of wild and hatchery salmon; the real and potential ecological impacts of sea cages and hatcheries; the potential use of waste product (gelatine) from the salmon industry; salmon behaviour and genetics including their broad applications that contribute to our understanding of fish biology, and nutritional and anti-nutritional factors in salmon culture. There are also chapters on environmental impacts and the economic importance of the commercial fishery and salmon farming industry; these are very important components of the industry, especially to the seafood sector.
Author : Thomas R. Loughlin
Publisher :
ISBN 13 :
Total Pages : 848 pages
Book Rating : 4.:/5 (318 download)
Download or read book Dynamics of the Bering Sea written by Thomas R. Loughlin and published by . This book was released on 1999 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamics of the Bering Sea is a valuable resource for scientists, students, and managers working in the Bering Sea and similar ecosystems worldwide. The international scientific organization PICES has successfully brought together the findings of scientists, of many disciplines and countries, to provide a perspective on physical, chemical, and biological research on the Bering Sea, one of the world's most productive ecosystems.
