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Population Dynamics Of Juvenile Steelhead Trout In Relation To Density And Habitat Characteristics
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Book Synopsis Population Dynamics of Juvenile Steelhead Trout in Relation to Density and Habitat Characteristics by : Gordon H. Reeves
Download or read book Population Dynamics of Juvenile Steelhead Trout in Relation to Density and Habitat Characteristics written by Gordon H. Reeves and published by . This book was released on 1979 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Population Dynamics of Juvenile Steelhead Trout in Relation to Density and Habitat Characteristics by : Mark A. Allen
Download or read book Population Dynamics of Juvenile Steelhead Trout in Relation to Density and Habitat Characteristics written by Mark A. Allen and published by . This book was released on 1986 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Demographic and Habitat Requirements for Conservation of Bull Trout by : Bruce E. Rieman
Download or read book Demographic and Habitat Requirements for Conservation of Bull Trout written by Bruce E. Rieman and published by . This book was released on 1993 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Ecology of Juvenile Steelhead (Oncorhynchus Mykiss) by : Knut Marius Myrvold
Download or read book The Ecology of Juvenile Steelhead (Oncorhynchus Mykiss) written by Knut Marius Myrvold and published by . This book was released on 2014 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Identifying the processes by which populations are governed and the conditions under which they are operant is a primary interest in ecology and has obvious relevance for management. Anadromous Pacific salmonids represent a particularly imperiled taxon with large conservation interest, especially in the Columbia River Basin, USA. This project concerned the juvenile rearing stage of a population of threatened Snake River steelhead (Oncorhynchus mykiss) in the Lapwai Creek watershed, Idaho. The system is characterized by hot and dry summers, heterogeneous habitat conditions, and substantial differences in densities both within and among tributary streams. The primary goal of this research was to identify mechanistic linkages between individual- and population-level demographic parameters and their environment, and to understand how population processes operate to shape individual performance. The results showed that temperature-induced energetic costs posed constraints on individual growth, suggesting that energetic cost can offset the competitive advantages of large body size when food is a limiting factor. Secondly, density-dependent regulation of cohort size occurred under certain conditions but was not ubiquitous, suggesting population sizes below carrying capacity. The strength of the regulation was explained by environmental conditions and temperature. Thirdly, despite overall low densities, density dependence was manifested in depressed individual growth rates. Growth rates in both cohorts were negatively related to the total population densities, but were inconsistently affected by the densities of the other cohort. Fourthly, habitat-based controls on densities were operant across spatial scales. Whereas watershed topography and discharge regime best described the variation in subyearling densities, yearlings were better described by channel hydraulics. Finally, site fidelity was overall low, suggesting that a large proportion of the individuals were not territorial, and that the propensity to stay was better predicted by habitat factors than biotic factors. In conclusion, these results show an overall strong abiotic control on juvenile steelhead abundance in the study system, but the strength of these controls to vary substantially across time and space. The subsequent strength of the density-dependent processes depended on these abiotic controls. The combined effects of these abiotic and density-dependent controls constrained and shaped individual growth performance and movement decisions.
Book Synopsis Habitat Utilization, Density, and Growth of Steelhead Trout, Coho Salmon, and Pacific Giant Salamander in Relation to Habitat Types in a Small Coastal Redwood Stream by : Michael Roy Lau
Download or read book Habitat Utilization, Density, and Growth of Steelhead Trout, Coho Salmon, and Pacific Giant Salamander in Relation to Habitat Types in a Small Coastal Redwood Stream written by Michael Roy Lau and published by . This book was released on 1994 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :U.S. Fish and Wildlife Service. Division of Ecological Services. Sacramento Field Office Publisher : ISBN 13 : Total Pages :214 pages Book Rating :4.3/5 (121 download)
Book Synopsis Annual Report, Trinity River Flow Evaluation Study by : U.S. Fish and Wildlife Service. Division of Ecological Services. Sacramento Field Office
Download or read book Annual Report, Trinity River Flow Evaluation Study written by U.S. Fish and Wildlife Service. Division of Ecological Services. Sacramento Field Office and published by . This book was released on 1987 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influences of Forest and Rangeland Management on Salmonid Fishes and Their Habitats by : William R. Meehan
Download or read book Influences of Forest and Rangeland Management on Salmonid Fishes and Their Habitats written by William R. Meehan and published by . This book was released on 1991 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Federal Energy Regulatory Commission Reports by : United States. Federal Energy Regulatory Commission
Download or read book Federal Energy Regulatory Commission Reports written by United States. Federal Energy Regulatory Commission and published by . This book was released on with total page 2276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cachuma Project Contract Renewal, Water Supply Project, Santa Ynez Valley, Bradbury Dam, Santa Barbara by :
Download or read book Cachuma Project Contract Renewal, Water Supply Project, Santa Ynez Valley, Bradbury Dam, Santa Barbara written by and published by . This book was released on 1995 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ecology of Atlantic Salmon and Brown Trout by : Bror Jonsson
Download or read book Ecology of Atlantic Salmon and Brown Trout written by Bror Jonsson and published by Springer Science & Business Media. This book was released on 2011-05-03 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: Destruction of habitat is the major cause for loss of biodiversity including variation in life history and habitat ecology. Each species and population adapts to its environment, adaptations visible in morphology, ecology, behaviour, physiology and genetics. Here, the authors present the population ecology of Atlantic salmon and brown trout and how it is influenced by the environment in terms of growth, migration, spawning and recruitment. Salmonids appeared as freshwater fish some 50 million years ago. Atlantic salmon and brown trout evolved in the Atlantic basin, Atlantic salmon in North America and Europe, brown trout in Europe, Northern Africa and Western Asia. The species live in small streams as well as large rivers, lakes, estuaries, coastal seas and oceans, with brown trout better adapted to small streams and less well adapted to feeding in the ocean than Atlantic salmon. Smolt and adult sizes and longevity are constrained by habitat conditions of populations spawning in small streams. Feeding, wintering and spawning opportunities influence migratory versus resident lifestyles, while the growth rate influences egg size and number, age at maturity, reproductive success and longevity. Further, early experiences influence later performance. For instance, juvenile behaviour influences adult homing, competition for spawning habitat, partner finding and predator avoidance. The abundance of wild Atlantic salmon populations has declined in recent years; climate change and escaped farmed salmon are major threats. The climate influences through changes in temperature and flow, while escaped farmed salmon do so through ecological competition, interbreeding and the spreading of contagious diseases. The authors pinpoint essential problems and offer suggestions as to how they can be reduced. In this context, population enhancement, habitat restoration and management are also discussed. The text closes with a presentation of what the authors view as major scientific challenges in ecological research on these species.
Book Synopsis Density and Habitat of Wild and Introduced Juvenile Steelhead Trout in the Lochsa River Drainage, Idaho by : L. Brent Mabbott
Download or read book Density and Habitat of Wild and Introduced Juvenile Steelhead Trout in the Lochsa River Drainage, Idaho written by L. Brent Mabbott and published by . This book was released on 1982 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Curricula in the Atmospheric and Oceanographic Sciences by : American Meteorological Society
Download or read book Curricula in the Atmospheric and Oceanographic Sciences written by American Meteorological Society and published by . This book was released on 1978 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fisheries and Wildlife Research and Development by :
Download or read book Fisheries and Wildlife Research and Development written by and published by . This book was released on 1989 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report on activities in the divisions of research and development.
Download or read book Aquaculture Research written by and published by . This book was released on 1983 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fisheries Review written by and published by . This book was released on 1992 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Forest and Stream Management in the Oregon Coast Range by : Stephen D. Hobbs
Download or read book Forest and Stream Management in the Oregon Coast Range written by Stephen D. Hobbs and published by . This book was released on 2002 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This major volume presents a wealth of fundamental and applied research on managing Coast Range forest and stream ecosystems. Written primarily for managers and resource specialists, the book will also appeal to policymakers, resource scientists, forest landowners, the conservation community, and students interested in forestry, fisheries, and wildlife sciences.
Download or read book Miscellaneous Publication written by and published by . This book was released on 1983 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
