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Author : David Rollin Swank
Publisher :
ISBN 13 :
Total Pages : 472 pages
Book Rating : 4.3/5 (91 download)
Download or read book Life-history Variation and Management of Wild Great Lakes Steelhead Populations written by David Rollin Swank and published by . This book was released on 2005 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 842 pages
Book Rating : 4.F/5 ( download)
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2005 with total page 842 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Colin Bailey
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (133 download)
Download or read book Drivers and Consequences of Life-history Variation in Steelhead Trout written by Colin Bailey and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Species with complex life histories - where individuals undergo a rapid ontogenetic shift followed by a change in habitat - may respond to environmental and ecological drivers in unanticipated ways. For example, traits shaped by conditions in one habitat could carry over to the next habitat leading to unpredicted consequences. Steelhead trout are anadromous with plastic, complex life-histories that display broad variation in both freshwater and marine phases of their life cycle. Here, I linked environmental variation (e.g., nutrient subsidies, marine climate) to life-history traits (e.g., smolt size, size at maturity) and carry-over effects to understand how these factors may affect population production in the depressed Keogh River, BC population. Beginning with a 40-year timeseries of steelhead abundance and juvenile life-history data, I examined how smolt production and traits (length and age) vary with freshwater rearing conditions. Steelhead smolt production, length-at-age, and age covary with temperature, artificial nutrient addition, and pink salmon spawning abundance (spawners generate a nutrient subsidy via eggs and carcass tissues that young steelhead eat). Next, I investigated how pink salmon egg abundance (and thus pink salmon spawning abundance) translated to egg consumption by young steelhead across varying fish communities. Using experimental egg additions, I discovered that increasing egg availability disrupted size- and species-based dominance hierarchies, allowing small juvenile steelhead and less competitive fishes to access eggs. In Chapter 4, I developed and validated improvements to scale-based fish length back-calculation to estimate smolt length from adult scales for use in Chapter 5. Finally, using three decades of archived adult steelhead scales, I examined how smolt traits (i.e., sex and back-calculated length) combine with marine environmental conditions to affect adult life-history traits and female steelhead egg production across three decades. I discovered carry-over effects of the freshwater environment on adult traits via relationships between smolt length and age- and length-at-maturity. However, the opposing effects of smolt length on age-at-maturity (which affects length-at-maturity) and length-at-maturity dampened the positive effect of smolt length on egg production. Collectively, this thesis informs steelhead management and demonstrates the complicated inter-relationships between environment and traits across complex and plastic life-histories.
Author : Peter Arthur Addison
Publisher :
ISBN 13 : 9780494401842
Total Pages : 296 pages
Book Rating : 4.4/5 (18 download)
Download or read book Adaptive Naturalization of Steelhead (Oncorhynchus Mykiss) Populations from Northern Lake Superior Tributaries written by Peter Arthur Addison and published by . This book was released on 2007 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Complementary life-history and genetic diversity (microsatellite DNA loci) were used to assess potential sources of extant phenotypic variation of eight naturalized steelhead populations from northern Lake Superior tributaries. Supplemental stocking subsequent to colonization, which occurred by 1920, has been very limited, thereby providing opportunities for genetic and phenotypic divergence. Populations exhibited high genetic diversity and similar allele size ranges, indicating a highly diverse common ancestor colonized the area. Furthermore, significant hierarchical divergence existed among populations. Five life-history parameters that are used to distinguish between native stocks of steelhead varied significantly among the study populations. Life-history variation was inconsistent with genetic variation and consistent with geographic distance among populations. Assuming that differences among tributary biophysical environments are positively associated with geographic distance these results support the hypothesis that reported life-history variation is the result natural processes (phenotypic plasticity, adaptation, drift and migration) and not contingent upon ancestry.
Author : Paul W. Seelbach
Publisher :
ISBN 13 :
Total Pages : 38 pages
Book Rating : 4.:/5 (89 download)
Download or read book Dynamics in Lake Superior of Hatchery and Wild Steelhead Emigrating from the Huron River, Michigan written by Paul W. Seelbach and published by . This book was released on 1993 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Patrick L. Hulett
Publisher :
ISBN 13 :
Total Pages : 76 pages
Book Rating : 4.3/5 (5 download)
Download or read book Genetic Conservation of Wild Steelhead in Washington Streams written by Patrick L. Hulett and published by . This book was released on 1993 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : James R. Harbeck
Publisher :
ISBN 13 :
Total Pages : 280 pages
Book Rating : 4.3/5 (129 download)
Download or read book Relative Contribution and Comparative Life History Characteristics of Hatchery and Wild Steelhead Trout in the Betsie River, Michigan written by James R. Harbeck and published by . This book was released on 1999 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : William Rundle Ardren
Publisher :
ISBN 13 :
Total Pages : 284 pages
Book Rating : 4.:/5 (319 download)
Download or read book Effective Number of Breeders, Rates of Loss of Genetic Variability, and Population Productivity in Two Steelhead Trout Populations written by William Rundle Ardren and published by . This book was released on 1999 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bror Jonsson
Publisher : Springer Science & Business Media
ISBN 13 : 9400711891
Total Pages : 720 pages
Book Rating : 4.4/5 (7 download)
Download or read book Ecology of Atlantic Salmon and Brown Trout written by Bror Jonsson and published by Springer Science & Business Media. This book was released on 2011-05-03 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: Destruction of habitat is the major cause for loss of biodiversity including variation in life history and habitat ecology. Each species and population adapts to its environment, adaptations visible in morphology, ecology, behaviour, physiology and genetics. Here, the authors present the population ecology of Atlantic salmon and brown trout and how it is influenced by the environment in terms of growth, migration, spawning and recruitment. Salmonids appeared as freshwater fish some 50 million years ago. Atlantic salmon and brown trout evolved in the Atlantic basin, Atlantic salmon in North America and Europe, brown trout in Europe, Northern Africa and Western Asia. The species live in small streams as well as large rivers, lakes, estuaries, coastal seas and oceans, with brown trout better adapted to small streams and less well adapted to feeding in the ocean than Atlantic salmon. Smolt and adult sizes and longevity are constrained by habitat conditions of populations spawning in small streams. Feeding, wintering and spawning opportunities influence migratory versus resident lifestyles, while the growth rate influences egg size and number, age at maturity, reproductive success and longevity. Further, early experiences influence later performance. For instance, juvenile behaviour influences adult homing, competition for spawning habitat, partner finding and predator avoidance. The abundance of wild Atlantic salmon populations has declined in recent years; climate change and escaped farmed salmon are major threats. The climate influences through changes in temperature and flow, while escaped farmed salmon do so through ecological competition, interbreeding and the spreading of contagious diseases. The authors pinpoint essential problems and offer suggestions as to how they can be reduced. In this context, population enhancement, habitat restoration and management are also discussed. The text closes with a presentation of what the authors view as major scientific challenges in ecological research on these species.
Author : Martha Angelica Arciniega Hernandez
Publisher :
ISBN 13 : 9780355132151
Total Pages : 50 pages
Book Rating : 4.1/5 (321 download)
Download or read book Parallel Evolution of the Summer Steelhead Ecotype in Multiple Populations From Oregon and Northern California written by Martha Angelica Arciniega Hernandez and published by . This book was released on 2017 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Parallel adaptive divergence of migratory and reproductive behavior can occur in multiple populations when similar selection is acting on these traits. Timing of migration, sexual maturity, and reproduction can have major impacts on the dynamics and viability of a population. Life-history variation in steelhead, Oncorhynchus mykiss, including variation in anadromous run timing, reproductive maturity and spawn timing, represents an important aspect of their biology and adaptation to local habitats. Here we present a genetic analysis of naturally spawning steelhead to evaluate the genetic relationships and ancestry of summer- and winter-run reproductive ecotypes from multiple river basins in Oregon and Northern California. We infer the phylogeographic relationships among populations of both summer- and winter-run steelhead ecotypes using 12 microsatellite loci and 90 single nucleotide polymorphisms. Phylogenetic trees and analysis of molecular genetic variance revealed that pairs of phenotypically and genetically distinct reproductive ecotypes within rivers were each other's closest relatives. Isolation by distance was also observed, confirming that genetic relatedness was strongly associated with geographic distance, and indicating limited migration or gene flow among river basins. These patterns support the hypothesis that the summer-run steelhead ecotype has repeatedly evolved through parallel evolution in multiple river basins. These results, together with further investigation of the underlying molecular basis for the divergence of winter- and summer-run steelhead life-history traits, will inform management and conservation efforts for these ecotypes and improve our understanding of the role of adaptive variation in conservation genetics.
Author :
Publisher :
ISBN 13 :
Total Pages : 338 pages
Book Rating : 4.:/5 (319 download)
Download or read book The 62nd Midwest Fish and Wildlife Conference written by and published by . This book was released on 2000 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Anthony J. Gharrett
Publisher : Springer Science & Business Media
ISBN 13 : 9400709838
Total Pages : 457 pages
Book Rating : 4.4/5 (7 download)
Download or read book Genetics of Subpolar Fish and Invertebrates written by Anthony J. Gharrett and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fisheries genetics researchers will find invaluable the thirty-eight peer-reviewed contributions in this book, presented at the 20th Lowell Wakefield Fisheries Symposium "Genetics of Subpolar Fish and Invertebrates," held in May 2002 in Juneau, Alaska. Looming over concerns of lost fisheries stocks and persistent erosion of genetic variability are predictions of global warming, which may further tax genetic resources. One consequence is an increased reliance on genetic applications to many aspects of fisheries management, aquaculture, and conservation. The contributions in this book are important to modern fisheries science and genetics, and illustrate the evolution of the field over the past decade. The improved technology provides tools to address increasingly complicated problems in traditional applications and ecological and behavioral studies. The union between molecular and quantitative genetics, where many of the major questions about population structure and evolution remain unanswered, will also benefit from the new technologies.
Author : Fred W. Allendorf
Publisher : Oxford University Press
ISBN 13 : 0192598570
Total Pages : 785 pages
Book Rating : 4.1/5 (925 download)
Download or read book Conservation and the Genomics of Populations written by Fred W. Allendorf and published by Oxford University Press. This book was released on 2022-02-10 with total page 785 pages. Available in PDF, EPUB and Kindle. Book excerpt: The relentless loss of biodiversity is among the greatest problems facing the world today. The third edition of this established textbook provides an updated and comprehensive overview of the essential background, concepts, and tools required to understand how genetics can be used to conserve species, reduce threat of extinction, and manage species of ecological or commercial importance. This edition is thoroughly revised to reflect the major contribution of genomics to conservation of populations and species. It includes two new chapters: "Genetic Monitoring" and a final "Conservation Genetics in Practice" chapter that addresses the role of science and policy in conservation genetics. New genomic techniques and statistical analyses are crucial tools for the conservation geneticist. This accessible and authoritative textbook provides an essential toolkit grounded in population genetics theory, coupled with basic and applied research examples from plants, animals, and microbes. The book examines genetic and phenotypic variation in natural populations, the principles and mechanisms of evolutionary change, evolutionary response to anthropogenic change, and applications in conservation and management. Conservation and the Genomics of Populations helps demystify genetics and genomics for conservation practitioners and early career scientists, so that population genetic theory and new genomic data can help raise the bar in conserving biodiversity in the most critical 20 year period in the history of life on Earth. It is aimed at a global market of applied population geneticists, conservation practitioners, and natural resource managers working for wildlife and habitat management agencies. It will be of particular relevance and use to upper undergraduate and graduate students taking courses in conservation biology, conservation genetics, and wildlife management.
Author : Brian Hodge
Publisher :
ISBN 13 :
Total Pages : 198 pages
Book Rating : 4.:/5 (68 download)
Download or read book Life History Variation in Oncorhynchus Mykiss from the Lower Klamath River Basin written by Brian Hodge and published by . This book was released on 2010 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kyle Stratton
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (128 download)
Download or read book Causes and Consequences of Population Changes in Black Bay Steelhead, Lake Superior written by Kyle Stratton and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding species interactions is an important component of fisheries resource management. Like the other Great Lakes, Lake Superior's fish species composition (and therefore interactions among species) has been changing for many decades. One of the largest changes in fish species composition in Lake Superior has taken place in Black Bay, with an increase in Walleye abundance since 2002 and a decrease in Steelhead abundance since 2008. However, changes in species interactions associated with this new species composition in Black Bay are unknown. I examined the potential interactions between Walleye and Steelhead in Black Bay using stable isotope analysis and life history theory. My results suggest a complex set of interactions both in stream and lake environments that may act to suppress current Steelhead populations. Specifically, I found shifts in Steelhead smolting strategies within Black Bay not observed elsewhere in Lake Superior that are consistent with size-specific increased juvenile mortality, possibly due to predation on smolts in Black Bay. Niche overlap analysis from stable isotope results showed evidence of some competition between Walleye and adult Steelhead as well as possible predation of smolts by mature Walleye in Black Bay. Furthermore, long-term analysis of Steelhead parr stable isotopes suggests significant changes in Steelhead resource use in the stream environment, possibly resulting from competition with Brook Trout.
Author : Javier Lobón-Cerviá
Publisher : John Wiley & Sons
ISBN 13 : 1119268311
Total Pages : 821 pages
Book Rating : 4.1/5 (192 download)
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.
Author : Robert Montgomery McDowall
Publisher : Timber Press (OR)
ISBN 13 :
Total Pages : 330 pages
Book Rating : 4.:/5 (318 download)
Download or read book Diadromy in Fishes written by Robert Montgomery McDowall and published by Timber Press (OR). This book was released on 1988 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the fish which exhibit diadromy, their life history strategies and the implications for fisheries. The book should therefore represent an important volume for workers in fish biology, animal physiology and behaviour, and fisheries.
