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Author: Molly Martha Cobleigh
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 158
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Book Description
Author: Molly Martha Cobleigh
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 158
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Book Description
Author: United States. Bonneville Power Administration. Division of Fish and Wildlife
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 70
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Book Description
Author: Carl B. Schreck
Publisher: Academic Press
ISBN: 0128027371
Category : Science
Languages : en
Pages : 604
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Book Description
Biology of Stress in Fish: Fish Physiology provides a general understanding on the topic of stress biology, including most of the recent advances in the field. The book starts with a general discussion of stress, providing answers to issues such as its definition, the nature of the physiological stress response, and the factors that affect the stress response. It also considers the biotic and abiotic factors that cause variation in the stress response, how the stress response is generated and controlled, its effect on physiological and organismic function and performance, and applied assessment of stress, animal welfare, and stress as related to model species. Provides the definitive reference on stress in fish as written by world-renowned experts in the field Includes the most recent advances and up-to-date thinking about the causes of stress in fish, their implications, and how to minimize the negative effects Considers the biotic and abiotic factors that cause variation in the stress response
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 71
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Selected transport media consisting of mineral salt additions (Na, Cl−, Ca/sup + +/, PO4−3, HCO3−, and Mg/sup + +/), mineral salts plus tranquilizing concentrations of tricaine methane sulfonate (MS-222), or MS-222 alone were tested for their ability to mitigate stress and increase smolt survival during single and mixed species hauling of Columbia River spring chinook salmon (Oncorhynchus tshawytscha) and steelhead trout (Salmo gairdneri). Successful stress mitigation was afforded by several formulations as indicated by protection against life-threatening osmoregulatory and other physiological dysfunctions, and against immediate and delayed hauling mortality. Effects on the seawater survival and growth of smolts hauled in transport media were used as the overall criterion of success. Of the fourteen chemical formulations tested, 10 ppM MS-222 emerged as top-rated in terms of ability to mitigate physiological stress during single and mixed species transport of juvenile spring chinook salmon at hauling densities of 0.5 or 1.0 lb/gallon. Immediate and delayed mortalities from hauling stress were also reduced, but benefits to early marine growth and survival were limited to about the first month in seawater. The two physical factors tested (reduced light intensity and water temperature) were generally less effective than mineral salt additions in mitigating hauling stress, but the degree of protection afforded by reduced light intensity was nevertheless judged to be physiologically beneficial. 36 refs., 1 fig., 19 tabs.
Author: Gary A. Wedemeyer
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 70
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Book Description
Author: United States. Army. Corps of Engineers. Portland District
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 79
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Book Description
Author: Jeffrey John Hard
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 29
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Book Description
Author: Peter B. Moyle
Publisher: Univ of California Press
ISBN: 0520276086
Category : Nature
Languages : en
Pages : 252
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Book Description
One of California's most remarkable wetlands, Suisun Marsh is the largest tidal marsh on the West Coast and a major feature of the San Francisco Estuary. This productive and unique habitat supports endemic species, is a nursery for native fishes, and is a vital link for migratory waterfowl. The 6,000-year-old marsh has been affected by human activity, and humans will continue to have significant impacts on the marsh as the sea level rises and cultural values shift in the century ahead. This study includes in-depth information about the ecological and human history of Suisun Marsh, its abiotic and biotic characteristics, agents of ecological change, and alternative futures facing this ecosystem.
Author: Megan Tyler Perry
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 152
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Book Description
In management of Pacific salmon, it is often assumed that density-dependent factors, mediated by the physical environment during freshwater residency, regulate population size prior to smolting and outmigration. However, in years following low escapement, temperature may be setting the upper limit on growth of juvenile chinook salmon Oncorhynchus tshawytscha during the summer rearing period. Given the importance of juvenile salmon survival for the eventual adult population size, we require a greater understanding of how density-dependent and independent factors affect juvenile demography through time. In this study we tested the hypotheses that (1) juvenile chinook salmon in the Chena River are food limited, and (2) that freshwater growth of juvenile chinook salmon is positively related with marine survival. We tested the first hypotheses using an in-situ supplemental feeding experiment, and the second hypothesis by conducting a retrospective analysis on juvenile growth estimated using a bioenergetics model related to return per spawner estimates from a stock-recruit analysis. We did not find evidence of food limitation, nor evidence that marine survival is correlated with freshwater growth. However, we did find some evidence suggesting that growth during the freshwater rearing period may be limited by food availability following years when adult escapement is high.
Author: Jon Joseph Lauer
Publisher:
ISBN:
Category : Salmon
Languages : en
Pages : 148
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Book Description
