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Intertidal Ecology And Life History Of Pink Salmon At Olsen Creek Prince William Sound Alaska Book in PDF, ePub and Kindle version is available to download in english. Read online anytime anywhere directly from your device. Click on the download button below to get a free pdf file of Intertidal Ecology And Life History Of Pink Salmon At Olsen Creek Prince William Sound Alaska book. This book definitely worth reading, it is an incredibly well-written.
Author : John H. Helle,Richard S. Williamson,Jack E. Bailey
Publisher : Unknown
Page : 36 pages
File Size : 42,7 Mb
Release : 1964
Category : Fishes
ISBN : UOM:39015086539528
Author : Cornelis Groot,L. Margolis
Publisher : UBC Press
Page : 602 pages
File Size : 54,7 Mb
Release : 1991
Category : Nature
ISBN : 0774803592
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.
Author : John H. Helle
Publisher : Unknown
Page : 28 pages
File Size : 46,8 Mb
Release : 1970
Category : Fishes
ISBN : UOM:39015086536482
Author : Anonim
Publisher : Unknown
Page : 28 pages
File Size : 43,5 Mb
Release : 1970
Category : Fisheries
ISBN : MINN:30000010643579
Author : United States. Congress. House. Committee on Merchant Marine and Fisheries
Publisher : Unknown
Page : 396 pages
File Size : 43,5 Mb
Release : 1993
Category : Science
ISBN : UOM:39015032389002
Author : Anonim
Publisher : Unknown
Page : 264 pages
File Size : 41,7 Mb
Release : 2000
Category : Anadromous fishes
ISBN : MINN:31951D02977181D
Author : R.B. Spies
Publisher : Elsevier
Page : 609 pages
File Size : 47,5 Mb
Release : 2006-12-12
Category : Nature
ISBN : 9780080469423
This comprehensive text is a major synthesis on ecological change in the Gulf of Alaska. It encompasses the structural and annual changes, forces of change, long-ecological changes in the atmosphere and ocean, plankton, fish, birds and mammals, and the effects of the 1989 Exxon Valdez Oil Spill. With 5 major sections, Long-term Ecological Change in the Northern Gulf of Alaska first describes the physical features, the atmosphere and physical oceanography, the annual production cycle, the forage base for higher animals and trophic transfer, and the adaptations for survival in this changing environment for 9 portal species. Then, the major forces of change are introduced: climate, geophysics, fisheries and harvesting, species interactions, disease and contaminants. Next, the long-term records of change in physical factors and biological populations are presented, as well as the potential reasons for the biological changes. Following is the history of the Exxon Valdez oil spill and its long-term effects. And, finally, the emergent properties of the ecosystem are discussed and an attempt is made to weigh the importance of the major forcing factors in terms of their temporal and spatial scales of influence. * Examines important data on long-term change in the ecosystem and the forcing factors that are responsible for it * Provides an account of the 1989 Exxon Valdez oil spill with emphasis on the long-term effects * Describes the effects of climate change, geophysical change, species interactions, harvesting, disease, the 1989 oil spill, and marine contaminants on key populations of marine organisms
Author : Anonim
Publisher : Unknown
Page : 990 pages
File Size : 50,9 Mb
Release : 1999
Category : Forests and forestry
ISBN : CORNELL:31924086697210
Author : Anonim
Publisher : Unknown
Page : 498 pages
File Size : 49,8 Mb
Release : 2002
Category : Electronic
ISBN : NWU:35556034538116
Author : Anonim
Publisher : Unknown
Page : 614 pages
File Size : 46,7 Mb
Release : 1976
Category : Fish culture
ISBN : CORNELL:31924001726151
Author : P. G. Wells,James Newton Butler,Jane S. Hughes
Publisher : ASTM International
Page : 963 pages
File Size : 40,5 Mb
Release : 1995
Category : Environmental aspects
ISBN : 9780803118966
Author : Anonim
Publisher : Unknown
Page : 440 pages
File Size : 55,7 Mb
Release : 1982
Category : Electronic
ISBN : NWU:35556031005150
Author : R. D. Lewis
Publisher : Unknown
Page : 434 pages
File Size : 41,9 Mb
Release : 1970
Category : Homarus
ISBN : UCSD:31822009733353
Author : United States. Bureau of Land Management. Alaska State Office
Publisher : Unknown
Page : 438 pages
File Size : 53,7 Mb
Release : 2002
Category : Alaska
ISBN : UOM:39015061860410
Author : Joseph G. Cloud,Gary H. Thorgaard
Publisher : Springer Science & Business Media
Page : 312 pages
File Size : 53,6 Mb
Release : 2012-12-06
Category : Medical
ISBN : 9781461528661
As the human population increases and nations become more industrialized, the habitat and water quality required for the survival of fish continues to decline. In addition to these environmental factors, fish populations are directly or potentially affected by harvesting, enhancement programs and introgression with hatchery-propagated or transgenic fish. To our knowledge no other scientific meeting has been assembled to consider the breadth of the problem, to review the technology that is presently available for the preservation of the germ plasm of salmonid stocks and to identify the scientific advances that are required to overcome the problems. Because many salmonids have spawning grounds within the confines of a specific region or county but will spend a large portion of their life cycle within the territorial waters of other countries or in the open ocean, the preservation of unique genes or gene pools in these animals requires international cooperation. This scientific meeting has provided a forum in which to discuss the problems, evaluate the present methods or technology for addressing the problems and suggest new directions or innovations that need to be implemented. During this meeting we limited our discussion to salmonid fishes. However, the general conclusions about the factors that affect the population dynamics of fish stocks and the technical aspects concerning the preservation of germ plasm will be applicable to other fish species.
