Caspian Tern Management to Reduce Predation of Juvenile Salmonids in the Columbia River Estuary
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Page : 178 pages
File Size : 28,10 MB
Release : 2005
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Page : 178 pages
File Size : 28,10 MB
Release : 2005
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Page : 900 pages
File Size : 24,72 MB
Release : 2002
Category : Chinook salmon
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Page : 432 pages
File Size : 40,23 MB
Release : 2005
Category : Clearwater River (Idaho)
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Author : United States. Congress. Senate. Committee on Environment and Public Works. Subcommittee on Drinking Water, Fisheries, and Wildlife
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Page : 128 pages
File Size : 40,64 MB
Release : 1999
Category : Nature
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Page : 400 pages
File Size : 22,94 MB
Release : 1999
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Author : Thomas P. Quinn
Publisher : University of Washington Press
Page : 398 pages
File Size : 23,83 MB
Release : 2005
Category : Science
ISBN : 9780295984575
Few subjects have generated as much emotional dialogue around conflicting scientific and policy agendas as the protection and management of Pacific salmon resources. In this major new work, esteemed fisheries expert Thomas Quinn distills from the vast scientific literature the essential information on the behavior and ecology of Pacific salmon, including steelhead and cutthroat trout. Unlike other books that examine only selected life stages, habitats, or species, this book--richly illustrated with beautiful photographs and original drawings--thoroughly covers the complete life cycle, emphasizing common themes and differences among the various species of salmon. Representing the range of species and geographic regions, Quinn includes examples from classic studies by pioneers of salmon biology and from the most current research to illustrate the important features of salmon life history and behavior and the complex physical, biological, and human factors that affect them. The Behavior and Ecology of Pacific Salmon and Trout introduces salmon and trout as a group, with a brief description of each species, and compares them to other fishes. The book then follows salmon on their amazing homeward migration from the open ocean, through the complex coastal waters, and upstream to the precise location where they were spawned years earlier. It 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. Quinn emphasizes the importance of salmon to humans and to natural ecosystems and the need to integrate sound biology into conservation efforts. This thorough, up-to-date survey should be on the shelf of anyone 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.
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Page : 130 pages
File Size : 42,4 MB
Release : 2006
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Publisher : DIANE Publishing
Page : 94 pages
File Size : 41,33 MB
Release : 2002
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ISBN : 1428944133
Columbia River Basin salmon and steelhead populations were once the world's largest. Before 1550, an estimated 16 million salmon and steelhead returned to the basin annually to spawn. Over the past 25 years, however, the number of salmon and steelhead returning to the Columbia River Basin has averaged around 660,000 per year, although annual population levels have varied widely. Various factors have contributed to the long-term decline including over-harvesting, the construction and operation of dams, the degradation of spawning habitat, increased human population, and unfavorable weather and ocean conditions. The population decline has resulted in the listing of 12 salmon and steelhead populations in the basin as threatened or endangered under the Endangered Species Act (ESA). Once a species is listed as threatened or endangered, the ESA requires that efforts be taken to allow the species to recover. The Department of Commerce's National Marine Fisheries Service (NMFS) is the lead agency responsible for the recovery of the threatened or endangered populations of Columbia River Basin salmon and steelhead. The recovery of a species entails the development and implementation of a plan for the species' conservation and survival. The ESA also requires other federal agencies to consult with NMFS before they take any action that may jeopardize the continued existence of listed salmon or steelhead populations in the Columbia River Basin. You asked us to (1) identify the roles and responsibilities of the federal agencies involved with the recovery of Columbia River Basin salmon and steelhead, (2) determine how much they have spent collectively on recovery efforts, and (3) determine what recovery actions they have undertaken and what they have accomplished.
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Page : 516 pages
File Size : 48,22 MB
Release : 2012
Category : Fisheries
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Author : United States. Congress. House. Committee on Resources
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Page : 216 pages
File Size : 42,85 MB
Release : 2001
Category : Nature
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