Download or read book Stream Fisheries Investigations written by and published by . This book was released on 1994 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stream Fisheries Investigation written by Vaughn L. Paragamian and published by . This book was released on 1987 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fishery Investigations written by Great Britain. Ministry of Agriculture, Fisheries and Food and published by . This book was released on 1926 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Summary of Biological and Contaminant Investigations Related to Stream Water Quality and Environmental Setting in the Upper Colorado River Basin 1938 95 written by Jeffrey R. Deacon and published by . This book was released on 1996 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water resources Investigations Report written by and published by . This book was released on 1996 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Current Federal Aid Research Report written by and published by . This book was released on 1982 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Warmwater Fisheries Symposium I written by and published by . This book was released on 1991 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Federal Aid in Fish and Wildlife Restoration written by and published by . This book was released on 1969 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dingell Johnson Quarterly written by and published by . This book was released on 1953 with total page 1332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fryingpan Arkansas Project written by and published by . This book was released on 1975 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wild Trout VII written by and published by . This book was released on 2000 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book Indexed Bibliography on Stream Habitat Improvement written by Richard S. Wydoski and published by . This book was released on 1978 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sport Fishery Abstracts written by and published by . This book was released on 1966 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Marine Biological Association of the United Kingdom International Fishery Investigations First Report on Fishery and Hydrographical Investigaitons in the North Sea and Adjacent Waters Southern Area written by Great Britain. North Sea fisheries investigation committee and published by . This book was released on 1907 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Progressive Fish Culturist written by and published by . This book was released on 1950 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt:
