Garrison Dam National Fish Hatchery
Author :
Publisher :
Page : 12 pages
File Size : 32,19 MB
Release : 1998
Category : Fish hatcheries
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Author :
Publisher :
Page : 12 pages
File Size : 32,19 MB
Release : 1998
Category : Fish hatcheries
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Author :
Publisher :
Page : 356 pages
File Size : 17,51 MB
Release : 1968
Category : Fisheries
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Author : Gunnar M. Brune
Publisher : Texas A&M University Press
Page : 616 pages
File Size : 16,38 MB
Release : 2002
Category : Business & Economics
ISBN : 9781585441969
This text explores the natural history of Texas and more than 2900 springs in 183 Texas counties. It also includes an in-depth discussion of the general characteristics of springs - their physical and prehistoric settings, their historical significance, and their associated flora and fauna.
Author :
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Page : 584 pages
File Size : 35,55 MB
Release : 2007
Category : U.S. states
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Author : United States. Environmental Data Service
Publisher :
Page : 362 pages
File Size : 12,84 MB
Release : 1970
Category : Alabama
ISBN :
Author : Gordon Mueller
Publisher :
Page : 90 pages
File Size : 27,97 MB
Release : 2002
Category : Colorado River (Colo.-Mexico)
ISBN :
The Colorado River had one of the most unique fish communities in the world. Seventy-five percent of those species were found nowhere else in the world. Settlement of the lower basin brought dramatic change to both the river and its native fish. Those changes began more than 120 years ago as settlers began stocking nonnative fishes. By 1930, nonnative fish had spread throughout the lower basin and replaced native communities. All resemblance of historic river conditions faded with the construction of Hoover Dam in 1935 and other large water development projects. Today, few remember what the Colorado River was really like. Seven of the nine mainstream fishes are now Federally-protected as endangered. Federal and state agencies are attempting to recover these fish. However, progress has been frustrated due to the severity of human impact. This report represents testimony, old descriptions, and photographs describing the changes that have taken place in hopes that it will provide managers, biologists, and the interested public a better appreciation of the environment that shaped these unique fish.
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Page : 2040 pages
File Size : 29,7 MB
Release : 1999-03
Category : Government purchasing
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Author :
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Page : 14 pages
File Size : 36,45 MB
Release : 2011
Category : Birds
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Author :
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Page : 342 pages
File Size : 12,35 MB
Release : 1993
Category : Fish habitat improvement
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Author : R. W. Dunfield
Publisher : Fisheries and Oceans, Scientific Information and Publications Branch
Page : 208 pages
File Size : 29,32 MB
Release : 1985
Category : Nature
ISBN :
The Atlantic salmon (Salmo salar) has occupied a salient position in the history of eastern North America for at least the past 1000 years. Initially the species occupied a prominant niche in the prolific web of life that existed throughout its former occurrence area; millions of pounds of salmon were produced annually from the freshwater streams between New York and Ungava - a resource that was a principal food source for the Amerindian cultures which shared its range. In a chronological and cumulative way, the salmon became an increasingly important factor in both the domestic and commercial life of the developing colonies; it provided a recreational outlet for the sportsman, and evolved as a principal object of intellectual and scientific investigation. The documented specifics of the salmon's history, however, are largely comprised of repetitive instances of overexploitation, careless destruction of stocks and their environment, and ineffectual conservation actions. Despite the species' former importance, its more recent history is one of declining presence, and its destiny appears to be extinction. By documenting this story of discovery, exploitation, and decline, the urgent need for the employment of sound resource management practices to preserve the salmon is emphasized. Appendix A: Historical methods of packing salmon.