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Some Effects Of Manipulating A Natural Brook Trout Population In A Subalpine Lake
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Book Synopsis Some Effects of Manipulating a Natural Brook Trout Population in a Subalpine Lake by : James Royce Bennett
Download or read book Some Effects of Manipulating a Natural Brook Trout Population in a Subalpine Lake written by James Royce Bennett and published by . This book was released on 1981 with total page 246 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 1982 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 1006 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thermal Stratification of Dilute Lakes by : Carl L. Schofield
Download or read book Thermal Stratification of Dilute Lakes written by Carl L. Schofield and published by . This book was released on 1993 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wyoming Wild Life written by and published by . This book was released on 1982 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1980 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ecological Implications of Trout Introductions to Lakes of the Selway Bitterroot Wilderness, Idaho by : Peter F. Bahls
Download or read book Ecological Implications of Trout Introductions to Lakes of the Selway Bitterroot Wilderness, Idaho written by Peter F. Bahls and published by . This book was released on 1990 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: The widespread introduction of trout to naturally fishless mountain lakes in the western United States has been accompanied by little research. The ecological role of trout populations occurring in 91 lakes of the central Selway Bitterroot Wilderness, Idaho, was examined with respect to 1) the sampling variability of biological and chemical lake characteristics measured, 2) possible effects of trout on biotic communities of crustacean zooplankton, macro-invertebrates, amphibians and reptiles, and 3) the relation of fish population characteristics (condition and maximum body length) to stocking rate, angling pressure, natural recruitment and lake habitat characteristics. Based on 22 lakes surveyed two or three times over a three year period, sampling variability was relatively low for individual species, biotic communities and length and weight of the largest fish in the population. Water conductivity measured at the lake surface from shore was the most reliable index of water quality, exhibiting low seasonal and duplicate sampling variability and a high correlation with alkalinity samples. Based on Detrended Correspondence Analysis (DCA), an ordination method used to organize the 91 lakes by the presence or absence of taxa, the composition of indigenous biotic communities was strongly related to the presence or absence of fish. The Multi-Response Permutation Procedure indicated that the difference in communities was statistically significant. Fewer taxa were sampled in lakes with fish and the taxa expected to be most vulnerable to predation due to their large size and frequent occurrence in open water were rarely found in lakes containing fish. DCA ordinations indicated that characteristics of the fish population (fish species, condition and maximum body length) were also related to the composition of the biotic community. This was probably due to the bottom up:top down trophic level interactions of predator and prey; fish affecting the structure of biotic communities by predation and prey affecting growth and condition of fish by their abundance and availability as determined by both physical habitat characteristics and impacts of predation by fish. Average condition and maximum body length of fish populations were related to stocking rate, natural recruitment, angling pressure and lake habitat variables by stepwise multiple regression. Average condition and maximum body length increased with decreasing level of natural recruitment for all fish population classes, except brook trout (all with high natural recruitment) and populations with no natural recruitment. Average fish condition increased with increasing angling pressure (measured by campsite impact and access distance ratings). Maximum body length of fish increased in relation to habitat variables, particularly presence of the large (2-3 mm) calanoid copepod, Diaptomus sp. Stocking rate was not related to average condition or maximum body length for any fish population class tested except one, where it may represent a spurious correlation. The findings of this study suggest the need to reassess high lake research and management policies that have promoted 1) widespread stocking of un-surveyed lakes on a regular basis and 2) considered stocking rate adjustments as an effective means of manipulating fish populations. Management direction can now be based on a recognition of the potential usefulness of one-time sampling of biological and chemical lake characteristics, the potential for significant impacts of fish on indigenous biotic communities, and the importance of natural recruitment, angling pressure and habitat variables in determining characteristics of the fish population. Recommendations include the identification and maintenance without further stocking of fishless lakes and lakes containing self sustaining trout populations (wild trout lakes).
Book Synopsis Wyoming Water Resources by : Sue Henry
Download or read book Wyoming Water Resources written by Sue Henry and published by . This book was released on 1983 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Zoological Record written by and published by . This book was released on 1982 with total page 1124 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Zoological Record is published annually in separate sections. The first of these is Comprehensive Zoology, followed by sections recording a year's literature relating to a Phylum or Class of the Animal Kingdom. The final section contains the new genera and subgenera indexed in the volume." Each section of a volume lists the sections of that volume.
Book Synopsis Selected Water Resources Abstracts by :
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of the Population Dynamics of Brook Trout in the Two Sub-alpine Lakes in Southeastern Wyoming by : William G. Hepworth
Download or read book A Study of the Population Dynamics of Brook Trout in the Two Sub-alpine Lakes in Southeastern Wyoming written by William G. Hepworth and published by . This book was released on 1959 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comprehensive Dissertation Index by :
Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1984 with total page 858 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The subalpine lake ecosystem, Øvre Heimdalsvatn, and its catchment: local and global changes over the last 50 years by : John E. Brittain
Download or read book The subalpine lake ecosystem, Øvre Heimdalsvatn, and its catchment: local and global changes over the last 50 years written by John E. Brittain and published by Springer. This book was released on 2015-03-21 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes research from 50 years of intensive study of a pristine subalpine lake ecosystem and its catchment. Coverage spans a range of topics, including studies focusing on changes in ice cover, water temperature, zooplankton, benthos and fish.
Book Synopsis Comprehensive Dissertation Index: Biological Sciences A-E by :
Download or read book Comprehensive Dissertation Index: Biological Sciences A-E written by and published by . This book was released on 1984 with total page 838 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Selected Water Resources Abstracts by :
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Umatilla National Forest (N.F.), Desolation Planning Unit Land Management Plan by :
Download or read book Umatilla National Forest (N.F.), Desolation Planning Unit Land Management Plan written by and published by . This book was released on 1979 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Canadian Journal of Fisheries and Aquatic Sciences by :
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 2004 with total page 1024 pages. Available in PDF, EPUB and Kindle. Book excerpt: