Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Growth And Reproductive Differences Observed Between Families Of Broodstock Selected From One Strain Of Rainbow Trout Salmo Gairdneri Vernon E Bennett
Download Growth And Reproductive Differences Observed Between Families Of Broodstock Selected From One Strain Of Rainbow Trout Salmo Gairdneri Vernon E Bennett full books in PDF, epub, and Kindle. Read online Growth And Reproductive Differences Observed Between Families Of Broodstock Selected From One Strain Of Rainbow Trout Salmo Gairdneri Vernon E Bennett ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Growth and reproductive differences observed between families of broodstock selected from one strain of rainbow trout Salmo gairdneri Vernon E. Bennett by : Vernon E. Bennett
Download or read book Growth and reproductive differences observed between families of broodstock selected from one strain of rainbow trout Salmo gairdneri Vernon E. Bennett written by Vernon E. Bennett and published by . This book was released on 1976 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Intra-strain Inheritance of Growth and Survival in Rainbow Trout, Salmo Gairdneri Richardson, Reared in Two Hatchery and Two Prairie Winterkill Lake Environments by : John Kenneth Bailey
Download or read book Intra-strain Inheritance of Growth and Survival in Rainbow Trout, Salmo Gairdneri Richardson, Reared in Two Hatchery and Two Prairie Winterkill Lake Environments written by John Kenneth Bailey and published by . This book was released on 1978 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intra-strain inheritance of growth and survival in rainbow trout (Salmo gairdneri), reared for 8-10 months in 2 hatchery and 2 prairie winterkill lake environments, was studied by means of a hierarchal mating design. Statistical determinations were made on both individual values and full sib family means. The implications for the genetic improvement of rainbow trout for extensive aquacultural purposes are discussed. Individual heritability values for fork length and weight were respectively, 0.09 and 0.06 in the non-competitive hatchery environment, 0.27 and 0.23 in the competitive hatchery environment, 0.09 and 0.00 in lake 971 and 0.27 and 0.04 in lake 506. Fork length and weight heritability estimates determined from full sib family means were much larger in all environments and were respectively, 0.58 and 0.42 in the non-competitive hatchery environment, 0.99 and 0.94 in the competitive hatchery environment, 1.08 and 0.50 in lake 971, and 0.78 and 0.74 in lake 506. In lakes 971 and 506 heritability estimates for individual survival were 0.18 and 0.02 respectively and for full sib family means they were 1.07 and 0.53 respectively. Inter-family competition caused a magnification of genetic differences between hatchery environments and was unimportant in the lake environments. Family selection is expected to produce a more rapid response in growth and survival than individual or mass selection. Genotype-environment interactions were important in all environments. Artificial selection would be more effective in the intended environment than in the hatchery. Additive genetic, environmental, and phenotypic correlations between fork length and weight were large and positive in all environments. Simultaneous selection for these traits would be effective.
Book Synopsis Factors Affecting Egg Size, Number and Survival in Selected University of Washington Brood Stock Rainbow Trout Salmo Gairdneri by : George Willard Ging
Download or read book Factors Affecting Egg Size, Number and Survival in Selected University of Washington Brood Stock Rainbow Trout Salmo Gairdneri written by George Willard Ging and published by . This book was released on 1973 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The relationship of size and age maturity in adult male rainbow trout Vernon E. Bennett by : Vernon E. Bennett
Download or read book The relationship of size and age maturity in adult male rainbow trout Vernon E. Bennett written by Vernon E. Bennett and published by . This book was released on 1973 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genetic Analysis of Growth and Reproductive Traits in Rainbow Trout by : Guosheng Su
Download or read book Genetic Analysis of Growth and Reproductive Traits in Rainbow Trout written by Guosheng Su and published by . This book was released on 1996 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Comparison of Precociousness in Three Graded Size Classes of Hatchery-reared Rainbow Trout (Salmo Gairdneri) by : British Columbia. Ministry of Environment and Parks
Download or read book A Comparison of Precociousness in Three Graded Size Classes of Hatchery-reared Rainbow Trout (Salmo Gairdneri) written by British Columbia. Ministry of Environment and Parks and published by . This book was released on 1986 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genomic and Fitness Consequences of Hybridization Between Cutthroat and Rainbow Trout by : Daniel P. Drinan
Download or read book Genomic and Fitness Consequences of Hybridization Between Cutthroat and Rainbow Trout written by Daniel P. Drinan and published by . This book was released on 2015 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hybridization is an important and common evolutionary process that can contribute to diversification, adaptation, and speciation. When species hybridize, divergent genomes are combined through recombination and may result in phenotypic changes. Such phenotypic changes may be the result of differences in chromosomal structure or adaptive divergence between the parental species and may ultimately affect fitness. Understanding how phenotypes change following hybridization, as well as the genetic mechanisms responsible for changes is critical for understanding divergent selection, speciation, and identifying populations that may be at risk from hybridization. Here, the effect of hybridization between cutthroat (Oncorhynchus clarkii) and rainbow trout (O. mykiss) on fitness was investigated using three techniques. In the first chapter, fitness influencing traits were compared among individuals at various hybridization levels. In the second chapter, genomic changes that could affect fitness were identified in the hybrid relative to rainbow trout. And, in the third chapter, correlations between reproductive success and hybridization were investigated in a wild population, as well as the genomic and ecological mechanisms responsible for those changes. The first chapter of this dissertation aimed to identify how traits potentially involved in fitness (embryonic survival, ova size, ova energy concentration, sperm motility, burst swimming performance, juvenile survival, and juvenile growth) changed with hybridization between cutthroat and rainbow trout and whether those changes could explain previously observed reductions in reproductive success of individuals with increased rainbow trout ancestry. Using progeny from wild caught fish, differences in phenotypes based on hybridization were observed for embryonic survival, ova energy concentration, juvenile weight, and burst swimming based on ancestry. However, the correlations differed from previously observed patterns of reproductive success and likely do not explain declines in reproductive success associated with hybridization. The second chapter of this dissertation aimed to identify how hybridization affects the genome by identifying genomic regions with changes in recombination rates in the hybrid relative to rainbow trout as well as genomic areas with excess species-specific ancestry in the hybrid. Previous studies of hybridization have observed recombination suppression in genomic regions where structural differences, such as inversions or karyotype differences, exist between parental species. Such regions may retain groups of adaptive alleles. Additionally, adaptive divergence between the parental species may result in alleles that are preferentially selected in the hybrid progeny. Identification of regions with suppressed recombination or excess species-specific ancestry would provide insight into markers that may be important to fitness and that have differentially evolved in each of the parental species. In total, eight and seven chromosomes were identified to have changes in recombination rates in the hybrid female and male relative to O. mykiss. Recombination was suppressed in the hybrids on two chromosomes with known structural differences between the parental species. In addition, changes in recombination rates were observed on five chromosomes with high proportions of duplicated markers and may be due to increased homeologous chromosome pairing. Recombination patterns were similar between the sexes which suggests that hybridization affects recombination in the same way in females and males. Regions of excess species-specific ancestry covered 11 and 10% of the mapped genome in the female and male and regions of excess were evenly split between cutthroat trout and O. mykiss. Genetic drift may be responsible for much of the observed patterns of excess species-specific ancestry, but selection may also play a role. The aim of the third chapter of this dissertation was to identify the fitness consequences of hybridization, mechanisms responsible for the retention of hybridization, and genomic regions correlated with changes in reproductive success in a wild population of westslope cutthroat trout hybridized with non-native rainbow trout. Adult samples from a previous study, collected over a five year period, were sequenced at 3027 loci. Increased admixture from non-native rainbow trout had a strong, negative effect on reproductive success. A decline of 53% was observed for individuals with an increased genetic contribution of 0.20 from rainbow trout. Despite apparent strong selection against rainbow trout ancestry, hybridization appears to be maintained largely by the invasion of rainbow trout from outside populations as well as the relatively high fitness of few hybrid individuals. Ten loci correlated with reproductive success were identified in females. Seven of the ten loci were linked to chromosomes and three were positioned on chromosomes. Loci linked to reproductive success were identified on chromosomes with excess species-specific ancestry in hybrid progeny (RYHyb14 and RYHyb18) as well as chromosomes with a high proportion of duplicated markers (RYHyb02) and known Robertsonian polymorphism (RYHyb20). The research presented in this dissertation will elucidate our understanding of the phenotypic and genetic changes correlated with hybridization between rainbow and cutthroat trout as well as identify genetic and ecological mechanisms that may be responsible for those changes. In addition, results from this study provide insight into differences in adaptive divergence and markers that may be involved in the early stages of speciation in the wild. Results could be used by managers to identify populations that are at risk from hybridization.
Book Synopsis Metal Metabolism in Aquatic Environments by : William J. Langston
Download or read book Metal Metabolism in Aquatic Environments written by William J. Langston and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Metabolism in Aquatic Environments is a synthesis of recent developments in the field of metal ecotoxicology and features a number of contemporary issues arising from the interaction of metals and biota, such as pathways of assimilation and food chain transfer, metal accumulation and detoxification in humans and biotransformation of elements such as mercury and arsenic.
Book Synopsis Real-Time PCR by : Kirstin J. Edwards
Download or read book Real-Time PCR written by Kirstin J. Edwards and published by Taylor & Francis. This book was released on 2004 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Introduction to Popular Culture by : Randall Groves
Download or read book Introduction to Popular Culture written by Randall Groves and published by . This book was released on 2021-07-13 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Water Pollution Control Research Series 16070 EOK 07/71. Oceanography of the Nearshore Coastal Waters of the Pacific Northwest Relating to Possible Pollution Vols 1- by : United States. Water Programs Office
Download or read book Water Pollution Control Research Series 16070 EOK 07/71. Oceanography of the Nearshore Coastal Waters of the Pacific Northwest Relating to Possible Pollution Vols 1- written by United States. Water Programs Office and published by . This book was released on 1971 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis British Prosobranch Molluscs by : Vera Fretter
Download or read book British Prosobranch Molluscs written by Vera Fretter and published by Scion Publishing. This book was released on 1994 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work offers detailed information on British prosobranch molluscs.
Book Synopsis The U.S. Fish And Wildlife Service by : Nathaniel Pryor Reed
Download or read book The U.S. Fish And Wildlife Service written by Nathaniel Pryor Reed and published by Routledge. This book was released on 2019-06-13 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides in-depth coverage of the U.S. Fish and Wildlife Service, the federal agency that manages the national wildlife refuge system, protects endangered species, and conducts fish and wildlife research. In addition to detailing the history and organization of the service, the authors take a hard look at its current—and often controversi
Book Synopsis The Eastern Oyster by : Victor S. Kennedy
Download or read book The Eastern Oyster written by Victor S. Kennedy and published by University of Maryland Sea Grant Publications. This book was released on 1996 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1966 Congress passed the National Sea Grant College Program Act to promote marine research, education, and extension services in institutions along the nation's ocean and Great Lakes coasts. In Maryland a Sea Grant Program -- a partnership among federal and state governments, universities, and industries -- began in 1977, and in 1982 the University of Maryland was named the nation's seventeenth Sea Grant College. The Maryland Sea Grant College focuses its efforts on the Chesapeake Bay, with emphasis on the marine concerns of fisheries, seafood technology, and environmental quality. The first comprehensive review of the biology of the eastern oyster in more than thirty years. The twenty-one chapters synthesize every aspect of oyster biology -- for instance, general anatomy, physiology, the circulatory system, reproduction, genetics, diseases -- and issues related to management and aquaculture.
Book Synopsis Introduction to Physical Oceanography by : Robert H. Stewart
Download or read book Introduction to Physical Oceanography written by Robert H. Stewart and published by Orange Grove Text Plus. This book was released on 2009-09 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is written for college juniors and seniors and new graduate students in meteorology, ocean engineering, and oceanography. It begins with a brief overview of what is known about the ocean. This is followed by a description of the ocean basins, for the shape of the seas influences the physical processes in the water. Next, students will study the external forces, wind and heat, acting on the ocean, and the ocean's response. It also includes the equations describing dynamic response of the ocean. For example, the equations of motion, the influence of earth's rotation, and viscosity. Finally, students consider some particular examples: the deep circulation, the equatorial ocean and El NiE no, and the circulation of particular areas of the ocean. Contents: 1) A Voyage of Discovery. 2) The Historical Setting. 3) The Physical Setting. 4) Atmospheric Influences. 5) The Oceanic Heat Budget. 6) Temperature, Salinity and Density. 7) The Equations of Motion. 8) Equations of Motion with Viscosity. 9) Response of the Upper Ocean to Winds. 10) Geostrophic Currents. 11) Wind Driven Ocean Circulation. 12) Vorticity in the Ocean. 13) Deep Circulation in the Ocean. 14) Equatorial Processes. 15) Numerical Models. 16) Ocean Waves. 17) Coastal Processes and Tides."
Book Synopsis Guidelines for the Promotion of Environmental Management of Coastal Aquaculture Development by : Uwe C. Barg
Download or read book Guidelines for the Promotion of Environmental Management of Coastal Aquaculture Development written by Uwe C. Barg and published by Food & Agriculture Org.. This book was released on 1992 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document is directed to aquaculture development specialists, coastal resource use planners and government officials involved and interested in the planning and management of coastal aquaculture development within the wider context of resource use in coastal areas. It is intended to serve in the promotion of environmental management of coastal aquaculture. Guidelines are given for improved environmental management of coastal aquaculture based on an overview of selected published experiences and concepts. Potential adverse environmental effects of and on coastal aquaculture practices are addressed with consideration of main socio-economic and bio-physical factors. Methodologies are presented for the assessment and monitoring of environmental hazards and impacts of coastal aquaculture. Selected environmental management options are described for application both at policy-level and farm-level.
Download or read book Salmon Ranching written by John E. Thorpe and published by . This book was released on 1980 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:
