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The Impacts Of Irrigation Water Withdrawals In Brown Trout Salmo Trutta And Two Species Of Benthic Macroinvertebrates In A Typical Southern Michigan Stream
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Book Synopsis The Impacts of Irrigation Water Withdrawals in Brown Trout (salmo Trutta) and Two Species of Benthic Macroinvertebrates in a Typical Southern Michigan Stream by : Charles Gowan
Download or read book The Impacts of Irrigation Water Withdrawals in Brown Trout (salmo Trutta) and Two Species of Benthic Macroinvertebrates in a Typical Southern Michigan Stream written by Charles Gowan and published by . This book was released on 1984 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Brown Trout by : Javier Lobón-Cerviá
Download or read book Brown Trout written by Javier Lobón-Cerviá and published by John Wiley & Sons. This book was released on 2017-10-13 with total page 881 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brown Trout: Biology, Ecology and Management A comprehensive guide to the most current research, history, genetics and ecology of the brown trout including challenging environmental problems The brown trout is an iconic species across its natural European distribution and has been introduced throughout the World. Brown Trout offers a comprehensive review of the scientific information and current research on this major fish species. While the brown trout is the most sought species by anglers, its introduction to various waters around the world is causing serious environmental problems. At the same time, introduction of exogenous brown trout lineages threats conservation of native gene pools of populations in many regions. The authors summarize the important aspects of the brown trout’s life history and ecology and focus on the impact caused by the species. The text explores potential management strategies in order to maintain numerous damaged populations within its natural distributional range and to ameliorate its impacts in exotic environments. The authors include information on a wide-range of topics such as recent updates in population genetics, evolutionary history, reproductive traits and early ontogeny, life history plasticity in anadromous brown trout and life history of the adfluvial brown trout and much more. This vital resource: Contains the latest research on the biology and ecology of brown trout Includes information on phylogeography, genetics, population dynamics and stock management Spotlights the brown trout’s introduction to regions around the world and the serious environmental impacts Offers a comprehensive review of conservation and management techniques Written for salmonid scientists and researchers, fishery and environmental managers, and students of population genetics, ecology and population dynamics, Brown Trout explores the most recent findings on the history, ecology and sustainability of this much-researched species.
Book Synopsis Research Publications of the H.J. Andrews Experimental Forest, Cascade Range, Oregon, 1948 to 1986 by :
Download or read book Research Publications of the H.J. Andrews Experimental Forest, Cascade Range, Oregon, 1948 to 1986 written by and published by . This book was released on 1987 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of the Impacts of a Simulated Irrigation Withdrawal on the Habitat and Populations of Brook Trout and Benthic Macroinvertebrates in Hunt Creek, Michigan by : Edward Allen Baker
Download or read book Evaluation of the Impacts of a Simulated Irrigation Withdrawal on the Habitat and Populations of Brook Trout and Benthic Macroinvertebrates in Hunt Creek, Michigan written by Edward Allen Baker and published by . This book was released on 1995 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Models that Predict Standing Crop of Stream Fish from Habitat Variables by : Kurt D. Fausch
Download or read book Models that Predict Standing Crop of Stream Fish from Habitat Variables written by Kurt D. Fausch and published by . This book was released on 1988 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: We reviewed mathematical models that predict standing crop of stream fish (number or biomass per unit area or length of stream) from measurable habitat variables and classified them by the types of independent habitat variables found significant, by mathematical structure, and by model quality. Habitat variables were of three types and were measured on different scales in relation to stream channels: variables of drainage basins were measured on the coarsest scale from topographic maps; channel-morphometry and flow variables were measured in the field along transects perpendicular to flow; and habitat-structure, biological, physical, and chemical variables were measured on the finest scale in the field. We grouped the 99 reviewed models by the types of independent variables found significant during model development: (A) primarily drainage basin (5 models), (8) primarily channel morphometry and flow (16 models), (C) primarily habitat structure, biological, physical, and chemical (25 models), (D) a combination of several types of variables (39 models), and (E) tests of weighted usable area as a habitat model (14 models. Most models were linear or multiple linear regressions, or correlations, but a few were curvilinear functions (exponential or power). Some used multivariate techniques (principal components or factor analysis), and some combined independent variables into one or more indices. We judged model quality based on simple criteria of precision and generality: coefficient of determination, sample size, and degrees of freedom. Most models were based on data sets of fewer than 20 observations and, thus, also had fewer than 20 degrees of freedom. Most models with coefficients of determination of greater than 0.75 had fewer than 20 degrees of freedom, which led us to conclude that relatively precise models often lacked generality. We found that sound statistical procedures were often overlooked or were minimized during development of many models. Frequent problems were too small a sample size, possible bias caused by error in measuring habitat variables, using poor methods for choosing the best model, not testing models, using models based on observational data to predict standing crop, and making unrealistic assumptions about capture probabilities when estimating standing crop. The major biological assumptionthat the fish population was limited by habitat rather than fishing mortality, interspecific competition, or predationusually was not addressed. We found five main ways stream-fish-habitat models are used in fishery management. To be useful for analyzing land management alternatives, models must include variables affected by management and be specific for a homogeneous area of land.
Download or read book Regulated Streams written by J. Craig and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Masters Abstracts International by :
Download or read book Masters Abstracts International written by and published by . This book was released on 1985 with total page 1632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Masters Abstracts written by and published by . This book was released on 1985 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Institute for Fisheries Research Report (Michigan. Institute for Fisheries Research) by :
Download or read book Institute for Fisheries Research Report (Michigan. Institute for Fisheries Research) written by and published by . This book was released on 1992 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fisheries Technical Report written by and published by . This book was released on 1997 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Juvenile Brown Trout and Steelhead Competition in Great Lakes Tributaries by : John Francis Kocik
Download or read book Evaluation of Juvenile Brown Trout and Steelhead Competition in Great Lakes Tributaries written by John Francis Kocik and published by . This book was released on 1992 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fisheries Research Report written by and published by . This book was released on 1995 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Canadian Journal of Civil Engineering by :
Download or read book Canadian Journal of Civil Engineering written by and published by . This book was released on 1995 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Urban Runoff Water-quality Impacts to Brown Trout(Salmo Trutta) in Rapid Creek, Rapid City, South Dakota by : Eric L. Krantz
Download or read book Urban Runoff Water-quality Impacts to Brown Trout(Salmo Trutta) in Rapid Creek, Rapid City, South Dakota written by Eric L. Krantz and published by . This book was released on 2002 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ecohydraulics 2000 by : Michel Leclerc
Download or read book Ecohydraulics 2000 written by Michel Leclerc and published by . This book was released on 1996 with total page 1020 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Copper Avoidance and Mortality of Juvenile Brown Trout (salmo Trutta) in Tests with Copper-sulfate-treated Water from West Branch Reservoir, Putnam County, New York by : Barry P. Baldigo
Download or read book Copper Avoidance and Mortality of Juvenile Brown Trout (salmo Trutta) in Tests with Copper-sulfate-treated Water from West Branch Reservoir, Putnam County, New York written by Barry P. Baldigo and published by . This book was released on 2001 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Statistical Evaluation of the Effects of Fall and Winter Flows on the Spring Condition of Rainbow and Brown Trout in the Green River Downstream of Flaming Gorge Dam by :
Download or read book Statistical Evaluation of the Effects of Fall and Winter Flows on the Spring Condition of Rainbow and Brown Trout in the Green River Downstream of Flaming Gorge Dam written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Flaming Gorge Dam, a hydroelectric facility operated by the Bureau of Reclamation (Reclamation), is located on the Green River in Daggett County, northeastern Utah. In recent years, single peak releases each day or steady flows have been the operational pattern during the winter period. A double-peak pattern (two flow peaks each day) was implemented during the winter of 2006-2007 by Reclamation. Because there is no recent history of double-peaking at Flaming Gorge Dam, the potential effects of double-peaking operations on the body condition of trout in the dam's tailwater are not known. A study plan was developed that identified research activities to evaluate potential effects from double-peaking operations during winter months. Along with other tasks, the study plan identified the need to conduct a statistical analysis of existing data on trout condition and macroinvertebrate abundance to evaluate potential effects of hydropower operations. This report presents the results of this analysis. We analyzed historical data to (1) describe temporal patterns and relationships among flows, benthic macroinvertebrate abundance, and condition of brown trout (Salmo trutta) and rainbow trout (Oncorhynchus mykiss) in the tailwaters of Flaming Gorge Dam and (2) to evaluate the degree to which flow characteristics (i.e., flow volumes and flow variability) and benthic macroinvertebrate abundance affect the condition of trout in this area. This information, together with further analyses of size-stratified trout data, may also serve as baseline data to which the effects of potential future double-peaking flows can be compared. The condition (length, weight and/or relative weight) of rainbow trout (Oncorhynchus mykiss) at two sites in the Green River downstream of Flaming Gorge Dam (Tailrace and Little Hole) and weight of brown trout (Salmo trutta) at the Little Hole site has been decreasing since 1990 while the abundance of brown trout has been increasing at the two sites. At the same time, flow variability in the river has decreased and the abundance of total benthic macroinvertebrates at the Tailrace site has increased. The condition of trout in spring (averaged across all sampled trout) was positively correlated with fall and winter flow variability (including within-day skewness, within-season skewness and/or change in flow between days) at both locations. No negative correlations between trout condition and any measure of flow variability were detected. The length and weight of rainbow trout at the Little Hole site were negatively correlated with increasing fall and winter flow volume. The condition of brown trout at Little Hole and the condition of brown and rainbow trout at Tailrace were not correlated with flow volume. Macroinvertebrate variables during October were either positively correlated or not correlated with measures of trout condition at the Tailrace and Little Hole sites. With the exception of a positive correlation between taxa richness of macroinvertebrates in January and the relative weight of brown trout at Tailrace, the macroinvertebrate variables during January and April were either not correlated or negatively correlated with measures of trout condition. We hypothesize that high flow variability increased drift by dislodging benthic macroinvertebrates, and that the drift, in turn, resulted in mostly lower densities of benthic macroinvertebrates, which benefited the trout by giving them more feeding opportunities. This was supported by negative correlations between benthic macroinvertebrates and flow variability. Macroinvertebrate abundance (with the exception of ephemeropterans) was also negatively correlated with flow volume. The change in trout condition from fall to spring, as measured by the ratio of spring to fall relative weight, was evaluated to determine their usefulness as a standardized index to control for the initial condition of the fish as they enter the winter period. The ratio values were less correlated with the fall condition values than the spring condition values and did not show the same relationships to flows, to macroinvertebrates, or across years as the above-mentioned spring relative weight values. We found that the condition ratio of rainbow trout at Tailrace was positively correlated with within-day flow variability but was not correlated with flow volume, between-day-, or within-season flow variability. The condition ratios of rainbow trout at Little Hole and of both trout species at Tailrace were not correlated to any of the measured flow variables. The condition ratios of both trout species were positively correlated with the abundance of January benthic macroinvertebrates at the Little Hole site and with January dipterans (brown trout) or total coleopterans (rainbow trout) at the Tailrace site. The relationships among flows, macroinvertebrates, and trout condition were varied among species and locations.
