Caspian Tern Management to Reduce Predation of Juvenile Salmonids in the Columbia River Estuary
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Page : 178 pages
File Size : 50,46 MB
Release : 2005
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Page : 178 pages
File Size : 50,46 MB
Release : 2005
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Page : 900 pages
File Size : 20,51 MB
Release : 2002
Category : Chinook salmon
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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 : 43,32 MB
Release : 1999
Category : Nature
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Author : United States. Congress. Senate. Committee on Energy and Natural Resources. Subcommittee on Water and Power
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Page : 132 pages
File Size : 49,93 MB
Release : 2000
Category : Nature
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Publisher : DIANE Publishing
Page : 94 pages
File Size : 12,51 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 : 432 pages
File Size : 47,56 MB
Release : 2005
Category : Clearwater River (Idaho)
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Page : 560 pages
File Size : 12,66 MB
Release : 1995
Category : Fishes
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Page : 330 pages
File Size : 18,89 MB
Release : 2011
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Page : 130 pages
File Size : 39,7 MB
Release : 2006
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Author : Barrie G M Jamieson
Publisher : CRC Press
Page : 543 pages
File Size : 36,58 MB
Release : 2007-01-02
Category : Science
ISBN : 1482280515
The second part of volume 6 discusses sexual selection of ultraviolet and structural signals; melanins and carotenoids as feather colorants and signals; sexual selection and auditory signaling; odors and chemical signaling; sexual dimorphism; sexual selection, signal selection and the handicap principle; courtship and copulation; sexual conflict an