Physical Habitat Factors Influencing the Distribution and Abundance of Rainbow Trout and Brown Trout in the Little Truckee River
Author: Jeffrey Lynn Kershner
Publisher:
Published: 1991
Total Pages: 266
ISBN-13:
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Author: Jeffrey Lynn Kershner
Publisher:
Published: 1991
Total Pages: 266
ISBN-13:
DOWNLOAD EBOOKAuthor: Michael J. Buntjer
Publisher:
Published: 1992
Total Pages:
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DOWNLOAD EBOOKRedd distribution, redd density, and physical habitat were used to explain the distribution and abundance of young-of-the-year (YOY) brown trout (Salmo trutta) and rainbow trout (Oncorhynchus mykiss) in the Green River, Utah. The importance of variables at both a microhabitat and macrohabitat scale were assessed using stepwise regression analysis. Availability of cover (rock and vegetation) and proximity to spawning sites were the most important variables used to explain the distribution and abundance of YOY brown trout and rainbow trout. In addition, YOY brown trout and rainbow trout occupied specific microhabitats and showed patterns of use for particular depths, substrates, and cover. However, the importance of variables differed by year, indicating that variables other than those measured were also influencing their distribution and abundance. The results of my study indicate that variables at both a microhabitat and macrohabitat scale may be important in explaining the distribution and abundance of YOY trout in streams. Therefore, to better understand the habitat requirements of stream fishes and to better explain their distribution and abundance in streams future, studies may need to incorporate both physical habitat variables and variables affecting recruitment.
Author:
Publisher:
Published: 1990
Total Pages: 28
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DOWNLOAD EBOOKAuthor: Robert F. Raleigh
Publisher:
Published: 1986
Total Pages: 80
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DOWNLOAD EBOOKAuthor: U.S. Fish and Wildlife Service
Publisher:
Published: 1990
Total Pages: 28
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DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1984
Total Pages: 80
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DOWNLOAD EBOOKAuthor: Christopher J. Hunter
Publisher:
Published: 1991
Total Pages: 360
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DOWNLOAD EBOOKBetter Trout Habitat explains the physical, chemical, and biological needs of trout, and shows how climate, geology, vegetation, and flowing water all help to create trout habitat.
Author: Richard L. Sundet
Publisher:
Published: 1984
Total Pages: 10
ISBN-13:
DOWNLOAD EBOOKThe primary objectives of this study in 1979 was to determine the seasonal distribution and relative abundance of selected fish species, with rainbow trout being the primary selected species, and to characterize the seasonal habitat requirements of these species. In 1983 these objectives were expanded to include also quantifying the important habitat parameters associated with spawning and rearing of these species and measuring fish density in spawning and rearing habitats to provide an estimate of habitat quality.
Author: Greg A. Cummings
Publisher:
Published: 2015
Total Pages: 246
ISBN-13:
DOWNLOAD EBOOKRainbow Trout Oncorhynchus mykiss are typically stocked in tailraces across the southeastern United States to mitigate fish habitat and assemblage alterations caused by large impoundments. Hypolimnetic discharges from Canyon Reservoir have created conditions suitable for a coldwater tail race fishery and trout have been stocked there since 1966. Changes in habitat availability for adult Rainbow Trout with discharge rate were examined to provide flow and habitat improvement recommendations for the Canyon Reservoir tailrace. Physical habitat modeling incorporated habitat suitability information for trout coupled with hydraulic modeling to assess habitat quality and quantity at various flow rates. Habitat mapping included traditional surveying, remote sensing, bathymetric mapping, and side scan sonar. Side scan sonar was evaluated for efficiency and applicability to river systems similar to the tailrace. Results indicate that summer water temperature is likely the primary limiting factor for adult trout survival and could impose limitations on physical habitat during critical summer months. Modified flow rates and habitat improvement could cause a potential increase in adult trout abundance and assist put-grow-and-take strategies in the upper portion of the tailrace. Side scan sonar provided efficient mapping of non-wadable sections of the study area. Challenges related to water level, access, navigability, positional accuracy, and post-processing were overcome. Trial runs, training, map accuracy assessments, and technological development will improve the effectiveness of this technique.