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Book Survival Movement and Habitat Utilization of Spring stocked Fingerling Brown Trout Salmo Trutta in Six Northeast Iowa Streams

Download or read book Survival Movement and Habitat Utilization of Spring stocked Fingerling Brown Trout Salmo Trutta in Six Northeast Iowa Streams written by Steven Allen Marshall and published by . This book was released on 1984 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Models that Predict Standing Crop of Stream Fish from Habitat Variables

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.

Book The Proceedings of the Iowa Academy of Science

Download or read book The Proceedings of the Iowa Academy of Science written by Iowa Academy of Science and published by . This book was released on 1984 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: List of members in each volume.

Book Habitat Suitability Index Models and Instream Flow Suitability Curves

Download or read book Habitat Suitability Index Models and Instream Flow Suitability Curves written by Robert F. Raleigh and published by . This book was released on 1986 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Brown Trout

Download or read book Brown Trout written by Javier Lobón-Cerviá and published by John Wiley & Sons. This book was released on 2017-12-18 with total page 821 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 Stocking of Brown Trout Salmo Trutta L

Download or read book Stocking of Brown Trout Salmo Trutta L written by Sara Jonsson and published by . This book was released on 2001 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Effects of Introduced Brown Trout Salmo Trutta on Habitat Use and Mortality Rates of Native Stream Fishes of Central Utah

Download or read book Effects of Introduced Brown Trout Salmo Trutta on Habitat Use and Mortality Rates of Native Stream Fishes of Central Utah written by Darren G. Olsen and published by . This book was released on 2000 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Survival Growth and Yield of Stocked Domesticated Brown and Rainbow Trout Fingerlings in Black Earth Creek

Download or read book Survival Growth and Yield of Stocked Domesticated Brown and Rainbow Trout Fingerlings in Black Earth Creek written by Oscar Marius Brynildson and published by . This book was released on 1966 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Quantitative Ecology and the Brown Trout

Download or read book Quantitative Ecology and the Brown Trout written by J. M. Elliott and published by Oxford University Press, USA. This book was released on 1994-02-17 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides, for the first time, a synthesiws of quantitative information on the ecology of the brown trout, including sea-trout, and comparisons with closely related species such as the Atlantic salmon, Pacific salmon, and rainbow trout. Much of this work, especially the case studies, is relevant to general problems in quantitative animal ecology as well as to fisheries management. One theme emphasized throughout is the development, testing, and use of realistic mathematical models as important tools for conservation and management of fish and other animals. - ;Covering not only brown trout, but also their close relatives, this book provides valuable information which is also relevant to animal ecology. The book highlights the global success of the species and provides a long-term case study of population dynamics of one population. It also considers growth and energetics, ecological differences between brown trout populations, natural selection and genetic differences between brown trout, and the mechanisms responsible for population regulation in juvenile trout. Emphasizing the value of such long-term studies to species management and conservation, the book stresses the importance of development, testing and use of realistic models when considering species such as brown trout. -

Book Tracking Movement and Identification of In stream Flow Needs of Brown Trout Salmo Trutta by Use of Radio isotopes

Download or read book Tracking Movement and Identification of In stream Flow Needs of Brown Trout Salmo Trutta by Use of Radio isotopes written by Lora S. Johnson and published by . This book was released on 1980* with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Survival of Stocked Brown Trout Salmo Trutta in the Pigeon River Ottawa County Michigan

Download or read book Survival of Stocked Brown Trout Salmo Trutta in the Pigeon River Ottawa County Michigan written by Daniel Wilson Mays and published by . This book was released on 2007 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Population Dynamics and Net Production of Brown Trout S a l m o T r u t t a in Two Areas of a High Gradient Mountain Stream

Download or read book Population Dynamics and Net Production of Brown Trout S a l m o T r u t t a in Two Areas of a High Gradient Mountain Stream written by Jeffrey C. Gosse and published by . This book was released on 1978 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: