Download or read book Evaluation of a Louver Guidance Facility Used to Sample Salmon and Trout Emigrants written by Terry Holubetz and published by . This book was released on 1967 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The subject of this thesis is an evaluation of a louver facility in the Lemhi River, Idaho. The louver facility was designed to guide juvenile chinook salmon and steelhead trout into a trap in order to sample downstream migrant populations. The study was designed to determine: (1) if the catch in the louver facility was a reliable index of emigrant population size, and (2) if an accurate estimate of the number of emigrants could be obtained through a mark-and-recapture program utilizing louver catches. The louver guidance facility provided a reliable method of estimating numbers of salmon and steelhead smolts that were emigrating from the upper Lemhi River. The louver facility collected a consistent proportion of the migrating chinook salmon and steethead trout smolts from the Lemhi River. Approximately 3 percent of the chinook smolts and 21 percent of the steelhead smolts were captured in the trap. Estimates of smolt numbers for both species were derived by expanding the louver-captured proportion. During 1965, an estimated 325,020 chinook smolts and 9,830 steelhead smolts emigrated from the upper Lemhi River. No estimates could be made for chinook fry emigrants. An estimated 98.6 percent of the steelhead smolts entering the louver facility were guided into the trap. An estimated 83.6 percent of the chinook smolts were guided into the trap. The guiding efficiency for chinook fry was estimated to be 20.2 percent. The efficiency of the louver system was greatest for large migrants and for periods when water temperature was high. The upstream migration barrier guided some steelhead smolts into the louver facility but did not guide chinook smolts. The majority of the chinook smolts migrated in the center portion of the stream.
Download or read book Survival Production and Yield of Trout and Chinook Salmon in the Lemhi River Idaho written by Theodore C. Bjornn and published by . This book was released on 1978 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theses and Dissertations Oregon State University written by and published by . This book was released on 1973 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theses and Dissertations 1966 1970 Oregon State University written by Margaret Basilia Guss and published by . This book was released on 1973 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulletin Forest Wildlife and Range Experiment Station written by and published by . This book was released on 1977 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulletin written by University of Idaho. College of Forestry, Wildlife, and Range Sciences and published by . This book was released on 1977 with total page 894 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliographic Series written by and published by . This book was released on 1973 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fish Passage Technologies written by and published by Office of Technology Assessment. This book was released on 1995 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Progress Report on Fisheries Engineering Research Program written by United States. Army. Corps of Engineers and published by . This book was released on 1960 with total page 1190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dams Fish and Fisheries written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2001 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance of free longitudinal passage of river fauna is stressed.
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1972 with total page 1064 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Sciences and Fisheries Abstracts written by and published by . This book was released on 1971-07 with total page 1164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Manual for provision of upstream migration facilities for eel and elver written by David J. Solomon and published by . This book was released on 2004 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fish Protection Technologies and Fish Ways for Downstream Migration written by Ulrich Schwevers and published by Springer. This book was released on 2019-06-24 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a comprehensive review of current systems for fish protection and downstream migration. It offers the first systematic description of the currently available technologies for fish protection at hydropower intakes, including accurate and timely data collected by the authors and other researchers. It describes how to design and test them in agreement with the guidelines established from the EU Water Framework Directive. The book includes important information about fish biology, with a special focus on swimming and migration mechanisms. It offers a robust bridge between concepts in applied ecology and civil hydraulic engineering, thus providing biologists and hydraulic engineers with an authoritative reference guide to both the theory and practice of fish protection. It is also of interest for planners, public authorities as well as environmental consultants
Download or read book Migration of Freshwater Fishes written by Martyn Lucas and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent studies have increasingly demonstrated the widespread existence of spatio-temporal variations in the abundance and distribution of species of freshwater fishes, previously assumed not to move between habitats. These movements are often on a seasonal or ontogenetic basis, for spawning, feeding and refuge, and in many cases are fundamental for the successful completion of lifecycles. This important book provides a single source for a range of previously widely dispersed information on these movements of fish in fresh waters, covering potamodromous fishes as well as the more familiar diadromous species, worldwide. Contents include full descriptions of types of migration and spatial behaviour, the stimulus and capacity for fish to migrate, the effects of climate on patterns of migratory behaviour, a taxonomic analysis (mostly by family) of freshwater fish migration, methods for studying migration, and details of the impacts of man's activities on freshwater fish migration. Migration of Freshwater Fishes provides an excellent and comprehensive reference to which the river manager, biologist or student can now refer to obtain information, advice and current opinion on the migratory behaviour of most taxonomic groups of fishes occurring in fresh water. University libraries and aquatic research stations should also have copies of this essential reference book on their shelves. Well-known international authors. Of great commercial importance to fisheries and professional angling bodies. Draws together much new information in one place. Detailed review of world wide migratory behaviour for most groups of freshwater fishes. Pure and applied relevance, for academics, fisheries scientists, river managers and conservationists. This comprehensive book includes 67 tables and figures and over 1,400 references.
Download or read book Ecohydraulics written by Ian Maddock and published by John Wiley & Sons. This book was released on 2013-07-01 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecohydraulics: An Integrated Approachprovides a research level text which highlights recent developments of this emerging and expanding field. With a focus on interdisciplinary research the text examines:- the evolution and scope of ecohydraulics interactions between hydraulics, hydrology, fluvial geomorphology and aquatic ecology the application of habitat modelling in ecohydraulic studies state of the art methodological developments and approaches detailed case studies including fish passage design and the management of environmental flow regimes research needs and the future of ecohydraulics research The contributions offer broad geographic coverage to encapsulate the wide range of approaches, case studies and methods used to conduct ecohydraulics research. The book considers a range of spatial and temporal scales of relevance and aquatic organisms ranging from algae and macrophytes to macroinvertebrates and fish. River management and restoration are also considered in detail, making this volume of direct relevance to those concerned with cutting edge research and its application for water resource management. Aimed at academics and postgraduate researchers in departments of physical geography, earth sciences, environmental science, environmental management, civil engineering, biology, zoology, botany and ecology; Ecohydraulics: An Integrated Approach will be of direct relevance to academics, researchers and professionals working in environmental research organisations, national agencies and consultancies.
