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Genetic Structure Of Southern California Coastal Steelhead Oncorhynchus Mykiss Popluations
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Book Synopsis Genetic Structure of Southern California Coastal Steelhead (Oncorhynchus Mykiss) Popluations by : Kiera Adams Larbre
Download or read book Genetic Structure of Southern California Coastal Steelhead (Oncorhynchus Mykiss) Popluations written by Kiera Adams Larbre and published by . This book was released on 2009 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Phenotypic Comparison of Thirty-eight Steelhead (Oncorhynchus Mykiss) Populations from Coastal Oregon by : Keith Martin Hatch
Download or read book A Phenotypic Comparison of Thirty-eight Steelhead (Oncorhynchus Mykiss) Populations from Coastal Oregon written by Keith Martin Hatch and published by . This book was released on 1990 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: An aspect of the genetic structure of coastal Oregon steelhead was explored and found to gradually change in a north to south pattern for the allelic frequencies of several enzymes. Isocitrate dehydrogenase and superoxide dehydrogenase were the clearest examples of this pattern of variation. This pattern was most evident in populations from river basins larger than 350 km2. The area south of the Coos River was marked by a transition in the increase of at least four rare alleles, most notably variants of phosphoglucose isomerase 2 and malate dehydrogenase 3-4. Populations from the largest (2000 km2) basins had on average 10% more variants of the ME 3 common enzyme than did populations from the smallest (200 km2) basins. The genetic distance between the Nehalem hatchery stock and neighboring wild stocks appears to have narrowed since the reintroduction of wild fish to the hatchery. In the decade since the last major electrophoretic work on coastal steelhead, most populations seemed little changed; however shifts in several isozyme frequencies were noted in populations from two Rogue River tributaries and the Elk River. The Bandon Hatchery stock persisted in showing large departures from coastwide trends for many alleles.
Book Synopsis Spatial and Temporal Genetic Structure of Winter-run Steelhead (Oncorhynchus Mykiss) Returning to the Mad River, California by : Steven R. Fong
Download or read book Spatial and Temporal Genetic Structure of Winter-run Steelhead (Oncorhynchus Mykiss) Returning to the Mad River, California written by Steven R. Fong and published by . This book was released on 2020 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: Distinct populations of steelhead in the wild are in decline. The propagation of steelhead in hatcheries has been used to boost population numbers for recreational fisheries and for use in conservation. However, hatchery breeding practices of steelhead can result in changes in genetic structure. I investigated the genetic structure of winter-run steelhead (Oncorhynchus mykiss) returning to the Mad River, California, where a hatchery has been used enhance production for recreational fisheries since 1971. Genetic variability in Mad River steelhead was evaluated using 96 single nucleotide polymorphisms (SNPs) among 4203 individuals, including the Mad River and nearby locations, and spanning 44 years from 1973 to 2017. I resolved evidence that in the 1970s the Mad River contained both an indigenous population, and a population influenced by the introduction of Eel River winter-run broodstock. Even with the introduction of Eel River broodstock, contemporary Mad River steelhead (1983-2017) appear to be distinct from Eel River collections, as well as other surrounding collections (except Redwood Creek). This distinction is a consequence of the presence of a historically unique population in the Mad River, combined with the inability of the initially introduced Eel River steelhead broodstock to establish itself. Lastly, I found that contemporary Mad River Hatchery broodstock are composed of three groups (or broodlines), defined by adult return year (1) 2009, 2012, and 2015, (2) 2010, 2013, and 2016, and (3) 2011 and 2014. Grouping in 3-year intervals is hypothesized to be a result of the predominant usage of age-3 individuals as broodstock at Mad River Hatchery.
Book Synopsis Molecular Genetic Approaches in Conservation by : Thomas B. Smith
Download or read book Molecular Genetic Approaches in Conservation written by Thomas B. Smith and published by Oxford University Press. This book was released on 1996-10-24 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular techniques are proving invaluable in determining the phylogenetic status of potentially endangered species, for investigating mechanisms of speciation, and for measuring the genetic structure of populations. It is increasingly important for ecologists and evolutionary and conservation biologists to understand and use such molecular techniques, but most workers in these areas have not been trained in molecular biology. This book lays out the principles and basic techniques for the molecular tools appropriate for addressing issues in conservation, and it presents case studies showing how these tools have been used successfully in conservation biology. Examples include the genetic analysis of population structure, various uses of DNA in conservation genetics, and estimation of migration parameters from genetic data. Wildlife managers, as well as researchers in these areas, will find this a valuable book.
Book Synopsis Morphometric Variation in Adult California Steelhead (Oncorhynchus Mykiss) Between Four Distinct Population Segments by : Farhat Sam Bajjaliya
Download or read book Morphometric Variation in Adult California Steelhead (Oncorhynchus Mykiss) Between Four Distinct Population Segments written by Farhat Sam Bajjaliya and published by . This book was released on 2014 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Morphology in biology is described as the quantitative description, analysis, and interpretation of shape and shape variation. Morphology of individuals within and among populations can vary due to many factors including geographic origin and habitat variation, sexual dimorphism, anthropogenic influence, and genotypic expression. Steelhead (Oncorhyncus mykiss) offer a particularly attractive opportunity to study how selective forces shape morphological variation because phenotypic expression can vary within and among populations, anthropogenic influences are readily identifiable through natural and hatchery production, and genetically distinct populations have been delineated within California. Natal homing, where sexually mature adult steelhead migrate to natal freshwater steams to spawn, minimizes genetic interchange among geographically isolated populations and promotes the maintenance of heritable genetic adaptations to local environments. Because of this, locally adapted traits, such as body size and shape, should be identifiable between populations. This is of particular importance when considering the management and recovery of California steelhead. The purpose of this study was to examine the distribution of adult steelhead morphometrics between four distinct population segments within California. Three key factors were chosen for analysis. These factors include: distinct population segment, including Central Valley, Klamath Mountains Province, Northern California, and Central California Coast; sex, including male and female; and origin, including natural and hatchery. Morphometric response variables chosen for analysis included: fork length, weight, and body depth. Multi-factor Analysis of Variance was identified as the most appropriate statistical tool. Post-hoc analysis involving a series of pairwise t-tests was conducted for the purpose of determining where specific differences exist. Results of this study indicate significant interactions between factor and response variables and reveal that the morphometrics of adult steelhead do differ between the four distinct population segments sampled. In general, the largest adult steelhead occurred within the Northern California Distinct Population Segment, followed by Central California Coast, Klamath Mountains Province, and Central Valley distinct population segments. Results also suggest that the four distinct population segments sampled can be distinguished by two distinct size-by-location classifications: coastal and inland populations. Adult steelhead within coastal populations have larger body depths and fork lengths, as well as heavier weights, when compared to adult steelhead within inland populations. An additional Analysis of Variance revealed that adult steelhead sampled within Nimbus Hatchery, the Northern California Distinct Population Segment, and the Central Valley Distinct Population Segment excluding Nimbus Hatchery were significantly different. Results also showed that the greatest difference in size of adult steelhead occurred between Nimbus Hatchery having the largest adult steelhead, and the Central Valley Distinct Population Segment having the smallest adult steelhead, across all response variables. Adult steelhead morphometrics within the Northern California Distinct Population Segment were intermediate in size when compared to adult steelhead at Nimbus Hatchery and the Central Valley Distinct Population Segment; however, adult steelhead within the Northern California Distinct Population Segment grouped more closely with those sampled at Nimbus Hatchery.
Book Synopsis Temporal Genetic Analysis of Steelhead (Oncorhynchus Mykiss) Reveals Hatchery-induced Drift in Captivity by : Melissa R. Reneski
Download or read book Temporal Genetic Analysis of Steelhead (Oncorhynchus Mykiss) Reveals Hatchery-induced Drift in Captivity written by Melissa R. Reneski and published by . This book was released on 2011 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Subpopulation Structure of Steelhead Trout (Oncorhynchus Mykiss) in the Middle Fork Eel River as Determined by Microsatellite DNA Polymorphisms by : Anthony J. Clemento
Download or read book Subpopulation Structure of Steelhead Trout (Oncorhynchus Mykiss) in the Middle Fork Eel River as Determined by Microsatellite DNA Polymorphisms written by Anthony J. Clemento and published by . This book was released on 2006 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Landscape Features on the Genetic Structure and Diversity of Steelhead and Rainbow Trout (Oncorhynchus Mykiss) in the Russian River Watershed by : Kristy L. Deiner
Download or read book The Effect of Landscape Features on the Genetic Structure and Diversity of Steelhead and Rainbow Trout (Oncorhynchus Mykiss) in the Russian River Watershed written by Kristy L. Deiner and published by . This book was released on 2003 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genetics of Subpolar Fish and Invertebrates by : Anthony J. Gharrett
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.
Book Synopsis Assessment of Historical and Contemporary Genetic Diversity of Steelhead (Oncorhynchus Mykiss) in the Lake Michigan Basin by : Meredith Lynn Bartron
Download or read book Assessment of Historical and Contemporary Genetic Diversity of Steelhead (Oncorhynchus Mykiss) in the Lake Michigan Basin written by Meredith Lynn Bartron and published by . This book was released on 2003 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Steelhead/rainbow Trout (Oncorhynchus Mykiss) Resources South of the Golden Gate, California by : Gordon S. Becker
Download or read book Steelhead/rainbow Trout (Oncorhynchus Mykiss) Resources South of the Golden Gate, California written by Gordon S. Becker and published by . This book was released on 2008 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pacific Salmon Life Histories by : Cornelis Groot
Download or read book Pacific Salmon Life Histories written by Cornelis Groot and published by UBC Press. This book was released on 1991 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pacific salmon are an important biological and economic resource of countries of the North Pacific rim. They are also a unique group of fish possessing unusually complex life histories. There are seven species of Pacific salmon, five occurring on both the North American and Asian continents (sockeye, pink, chum, chinook, and coho) and two (masu and amago) only in Asia. The life cycle of the Pacific salmon begins in the autumn when the adult female deposits eggs that are fertilized in gravel beds in rivers or lakes. The young emerge from the gravel the following spring and will either migrate immediately to salt water or spend one or more years in a river or lake before migrating. Migrations in the ocean are extensive during the feeding and growing phase, covering thousands of kilometres. After one or more years the maturing adults find their way back to their home river, returning to their ancestral breeding grounds to spawn. They die after spawning and the eggs in the gravel signify a new cycle. Upon this theme Pacific salmon have developed many variations, both between as well as within species. Pacific Salmon Life Histories provides detailed descriptions of the different life phases through which each of the seven species passes. Each chapter is written by a scientist who has spent years studying and observing a particular species of salmon. Some of the topics covered are geographic distribution, transplants, freshwater life, ocean life, development, growth, feeding, diet, migration, and spawning behaviour. The text is richly supplemented by numerous maps, illustrations, colour plates, and tables and there is a detailed general index, as well as a useful geographical index.
Book Synopsis Biogeomorphic Responses to Wildfire in Fluvial Ecosystems by : Joan L. Florsheim
Download or read book Biogeomorphic Responses to Wildfire in Fluvial Ecosystems written by Joan L. Florsheim and published by Geological Society of America. This book was released on 2024-05-22 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ecology and Distribution of Steelhead (Oncorhynchus Mykiss) in the Eel River, California by : Samantha Heather Kannry
Download or read book Ecology and Distribution of Steelhead (Oncorhynchus Mykiss) in the Eel River, California written by Samantha Heather Kannry and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Run-timing in salmonids is a prime example to study adaptive complexity in an iconic, culturally and economically important species. The Eel River in Northwestern California represents the southernmost extant population of summer-run steelhead in North America and is at the near-limit of the species’ thermal tolerance. It therefore presents an ideal location to examine the genetic basis for run-timing variations. Here we examine a number of issues related to steelhead conservation: 1) the extent to which upstream passage is blocked by ostensible physical barriers to dispersal; 2) spawning and rearing distribution of the two run-timings; 3) distribution of resident and anadromous genotypes; and 4) genetic diversity in a population of resident trout isolated above an impassable dam for nearly a century. Using Rapture (RAD Capture), we called genotypes at the region diagnostic for run-timing (GREB1L) and the region strongly associated with residency/anadromy in steelhead (OMY5). Remarkably, we concluded steelhead are passing a waterfall that has been managed as a complete barrier to anadromy. We also observed distinct spatial segregation between winter and summer-run steelhead in both the Middle Fork Eel and Van Duzen Rivers. Finally, we found evidence that prior to dam construction, summer-run steelhead inhabited the upper mainstem Eel, and that both life-history and overall genetic diversity are currently maintained in the resident trout population. Resident trout above the dam are well-suited to re-colonize the upper watershed if upstream passage were to be restored through the upcoming FERC re-licensing process.
Book Synopsis Workshop on Status and Trends in Aquatic Genetic Resources by : Devin M. Bartley
Download or read book Workshop on Status and Trends in Aquatic Genetic Resources written by Devin M. Bartley and published by Food & Agriculture Org.. This book was released on 2007 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Of the workshop -- Background of the workshop -- Report of the workshop -- Conclusions and recommendations of the workshop -- Contributed papers. Developing policies for the management of fishery genetic resources / D.M. Bartley and A. Toledo -- Status and trends in genetic resources of capture fisheries / W.S. Grant -- Issues, status and trends in deep-sea fishery genetic resources / P.J. Smith -- Genetic resources for aquaculture : status and trends / R.S.V. Pullin -- Fish genomics and analytical genetic technologies, with examples of their potential applications in management of fish genetic resources / Z. Liu.
Book Synopsis Adaptive Naturalization of Steelhead (Oncorhynchus Mykiss) Populations from Northern Lake Superior Tributaries by : Peter Arthur Addison
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.
Book Synopsis Molecular Genetics and Stock Identification in Pacific Salmon (Onocorhynchus Spp.) by : Jennifer Lee Nielsen
Download or read book Molecular Genetics and Stock Identification in Pacific Salmon (Onocorhynchus Spp.) written by Jennifer Lee Nielsen and published by . This book was released on 1994 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
