Download or read book Pacific Salmon Life Histories written by Cornelis Groot and published by UBC Press. This book was released on 1991 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pacific salmon are an important biological and economic resource of countries of the North Pacific rim. They are also a unique group of fish possessing unusually complex life histories. There are seven species of Pacific salmon, five occurring on both the North American and Asian continents (sockeye, pink, chum, chinook, and coho) and two (masu and amago) only in Asia. The life cycle of the Pacific salmon begins in the autumn when the adult female deposits eggs that are fertilized in gravel beds in rivers or lakes. The young emerge from the gravel the following spring and will either migrate immediately to salt water or spend one or more years in a river or lake before migrating. Migrations in the ocean are extensive during the feeding and growing phase, covering thousands of kilometres. After one or more years the maturing adults find their way back to their home river, returning to their ancestral breeding grounds to spawn. They die after spawning and the eggs in the gravel signify a new cycle. Upon this theme Pacific salmon have developed many variations, both between as well as within species. Pacific Salmon Life Histories provides detailed descriptions of the different life phases through which each of the seven species passes. Each chapter is written by a scientist who has spent years studying and observing a particular species of salmon. Some of the topics covered are geographic distribution, transplants, freshwater life, ocean life, development, growth, feeding, diet, migration, and spawning behaviour. The text is richly supplemented by numerous maps, illustrations, colour plates, and tables and there is a detailed general index, as well as a useful geographical index.
Download or read book Fishery Bulletin written by and published by . This book was released on 1974 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Control of Fish Migration written by R.J.F. Smith and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fish migration is important and spectacular. Migratory fish gather energy in one portion of the environment and transport it to other areas, where it often becomes available to humans or to other elements in the ecosystem. Migration brings fish into situations that allow easy harvest as they concentrate along migration routes. Their journeys also make them vulnerable to human intereference at critical points along their route. Salmon, for example, may harvest plankton in the open ocean and transport that food energy to coastal and inland regions, where it is captured by fisheries or deposited in inland streams and utilized by the flora and fauna of the region. These salmon are able to complete journeys of thousands of kilometers from their natal streams to oceanic feeding grounds and back to the same home streams, an accomplishment that strains our credi bili ty . We now understand some of the timing and guiding stimuli used in these migrations, and mechanisms can be logically proposed, on the basis of the established abilities of fishes, to account for the unexplained portions of the migrations. There is no single factor guiding these fish. Instead, they are dependent on the presence in their environment of a great variety of appropriate orienting and timing stimuli. These stimuli are vulnerable to human interference. The more widespread and easily available the information on these requirements, the more readily fish can be protected from such interference.
Download or read book Bulletin International North Pacific Fisheries Commission written by and published by . This book was released on 1976 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Special Scientific Report written by and published by . This book was released on 1957 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report of the Bureau of Commercial Fisheries for the Calendar Year written by United States. Bureau of Commercial Fisheries and published by . This book was released on 1966 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book N O A A Technical Report NMFS SSRF written by and published by . This book was released on 1957 with total page 1296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report of the Bureau of Commercial Fisheries written by United States. Bureau of Commercial Fisheries and published by . This book was released on 1965 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report of the Bureau of Commercial Fisheries written by Commercial Fisheries Bureau and published by . This book was released on 1968 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Commercial Fisheries Review written by and published by . This book was released on 1968 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oceanography of the Northeastern Pacific Ocean and Eastern Bering Sea and Relations to Various Living Marine Resources written by F. Favorite and published by . This book was released on 1977 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of a Synthesis Meeting written by and published by . This book was released on 1982 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of meeting held in Anchorage, Alaska, April 28-30, 1981. Purpose to describe marine and coastal environments of St. George Basin lease area in Bering Sea and to discuss and record environmental issues of concern and environmental consequences of the proposed offshore oil and gas development. Sections include: transport and fate of spilled oil, environmental hazards to petroleum industry development, marine mammals, marine birds, finfish resources, and shellfish resources. An OCSEAP synthesis report.
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.
Download or read book Proceedings of a Synthesis Meeting the North Aleutian Shelf Environment and Possible Consequences of Offshore Oil and Gas Development written by Lyman K. Thorsteinson and published by . This book was released on 1984 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sport Fishery Abstracts written by and published by . This book was released on 1975 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Developing a Research and Restoration Plan for Arctic Yukon Kuskokwim Western Alaska Salmon written by National Research Council and published by National Academies Press. This book was released on 2005-07-06 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent declines in the abundance of salmon in the Arctic-Yukon-Kuskokwim (AYK) region of western Alaska have created hardships for the people and communities who depend on this resource. In 2002, the AYK Sustainable Salmon Initiative (SSI) was created to undertake research to understand the reasons for this decline and to help support sustainable management in the region. This report makes recommendations for developing the research that the AYK SSI science plan should be based on, and relates the development of a restoration plan to the results of that research.
