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The Genetic Structure Of Sockeye Salmon Oncorhynchus Nerka In The Chignik Watershed Alaska
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Book Synopsis The Genetic Structure of Sockeye Salmon (Oncorhynchus Nerka) in the Chignik Watershed, Alaska by : Elisabeth K. Creelman
Download or read book The Genetic Structure of Sockeye Salmon (Oncorhynchus Nerka) in the Chignik Watershed, Alaska written by Elisabeth K. Creelman and published by . This book was released on 2010 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis History of the Fishery and Summary Statistics of the Sockeye Salmon, Oncorhynchus Nerka, Runs to the Chignik Lakes, Alaska, 1888-1966 by : Michael L. Dahlberg
Download or read book History of the Fishery and Summary Statistics of the Sockeye Salmon, Oncorhynchus Nerka, Runs to the Chignik Lakes, Alaska, 1888-1966 written by Michael L. Dahlberg and published by . This book was released on 1979 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spatio-temporal Genetic Structure, Effective Population Size, and Parentage Simulations from Contemporary Genetic Samples and Historic Demographic Data of Sockeye Salmon (Oncorhynchus Nerka) in Auke Lake, Alaska by : Patrick D. Barry
Download or read book Spatio-temporal Genetic Structure, Effective Population Size, and Parentage Simulations from Contemporary Genetic Samples and Historic Demographic Data of Sockeye Salmon (Oncorhynchus Nerka) in Auke Lake, Alaska written by Patrick D. Barry and published by . This book was released on 2021 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pacific salmon (Oncorhynchus spp.) have great ecological, economic, and cultural importance. Accordingly, understanding the genetic diversity of Pacific salmon populations is critical for their effective management and conservation. Spatial and temporal homing fidelity, a central life-history characteristic of Pacific salmon, generates genetic structure through reproductive isolation. Within and among populations, heterogeneity in the freshwater environment should lead to selection for traits that maximize fitness resulting in local adaptation. This adaptation increases productivity of individual populations while diversity among populations can promote long-term stability. Additionally, the demographic properties (age structure, generation length, size) of a population will affect genetic structure by regulating its response to the evolutionary forces of selection, migration, and genetic drift. The scale and extent to which reproductive isolation can produce genetic structure is incompletely understood. In this dissertation, I investigated spatial and temporal trends in population genetic structure and estimated the effective population size (Ne) of Sockeye Salmon from Auke Lake in Southeast Alaska from contemporary genetic samples (2008, 2009, 2011) and historic demographic data (1980–2017). A simulation library in the R statistical environment was developed to assess the accuracy of parentage and sibship inference from genetic markers. This library proved useful in evaluating the sibship method for estimating Ne from genetic data and evaluating genetic markers for a large-scale parentage project. I detected substantial genetic differentiation between Auke Lake and other Southeast Alaska populations (average FST = 0.1137) and an isolation-by-time pattern within the Auke Lake population. A genetically distinct cluster was identified in the late portion of the 2008 return. This group may represent a spatially segregated spawning aggregation previously described in tagging studies; however, because fish were sampled as they passed through the weir, spatial structure within Auke Lake could not be evaluated. Genetic tests for demographic change within the population indicated that the Auke Lake Sockeye Salmon population underwent a historical bottleneck event but has since increased in size. Demographic estimates of Ne from a long-term dataset from the Auke Creek weir revealed that the effective population size was low in the early 1980s and has since increased. Over the six generations evaluated, the major demographic factors that determined Ne were variance in family size, variable contribution to the next generation by brood years within a generation, and fluctuations in population size. Contemporary estimates of Ne from genetic methods were smaller than those from demographic methods and indicated that Ne may be roughly the size of an individual return year. Genetic estimates of the ratio of the effective population size to the census size (Ne/Nc = 0.21) were consistent with values previously reported for other salmonids. Collectively, these chapters contribute to an improved understanding of Sockeye Salmon population genetics and provide a useful tool to assess the power of genetic markers for parentage and sibship inference.
Book Synopsis Assessing Juvenile Sockeye Salmon (Oncorhynchus Nerka) Energy Densities and Their Habitat Quality in the Chignik Watershed, Alaska by : Heather Finkle
Download or read book Assessing Juvenile Sockeye Salmon (Oncorhynchus Nerka) Energy Densities and Their Habitat Quality in the Chignik Watershed, Alaska written by Heather Finkle and published by . This book was released on 2004 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Chignik watershed, on the southern side of the Alaska Peninsula, supports a large salmon fishery vital to the local economy. Recent morphological changes to the watershed generated concern regarding the sockeye salmon (Oncorhynchus nerka) stock that rears in Black Lake, at the head of the system. Studies of the Chignik watershed to date have not incorporated energy density data to explain the life history strategies of Chignik sockeye salmon. Re-estimated condition factor parameters improved our understanding of the length-weight relationships to fish health that isometric models described in Chignik sockeye salmon. Subsequent comparisons of age, length, weight, location, and temperature data to energy density indicated that Black Lake fish, which were all age 0 fish, were significantly affected by temperature and had energy densities greater than did fish from other areas of the watershed. Sockeye salmon captured in Chignik Lake, Chignik River, and Chignik Lagoon were only energetically different from one another based on age. Observed seasonal trends suggested juvenile sockeye salmon emigrate from Black Lake before the onset of winter due to forage and temperature limitations. A constant downstream migration occurred in the watershed during the summer, which suggested smoltification and osmoregulation processes in Chignik Lagoon fish"--Leaf iii.
Book Synopsis Genetic Diversity of Sockeye Salmon (Oncorhynchus Nerka) of Cook Inlet, Alaska, and Its Application to Restoration of Injured Populations of the Kenai River by : Lisa Wishard Seeb
Download or read book Genetic Diversity of Sockeye Salmon (Oncorhynchus Nerka) of Cook Inlet, Alaska, and Its Application to Restoration of Injured Populations of the Kenai River written by Lisa Wishard Seeb and published by . This book was released on 1995 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genetic, Morphometric, and Life History Characteristics of Sockeye Salmon (Oncorhynchus Nerka) in the Wood River Lake System, Alaska by : Lisa Anne Wetzel
Download or read book Genetic, Morphometric, and Life History Characteristics of Sockeye Salmon (Oncorhynchus Nerka) in the Wood River Lake System, Alaska written by Lisa Anne Wetzel and published by . This book was released on 1993 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genetic Analysis of Sockeye Salmon Populations from the Chignik Watershed by : Penelope Ann Crane
Download or read book Genetic Analysis of Sockeye Salmon Populations from the Chignik Watershed written by Penelope Ann Crane and published by . This book was released on 1999 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biology of Juvenile Sockeye Salmon Resident in Chignik River, Alaska by : Ronald Albert Iverson
Download or read book Biology of Juvenile Sockeye Salmon Resident in Chignik River, Alaska written by Ronald Albert Iverson and published by . This book was released on 1966 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: The life history of juvenile sockeye salmon (Oncorhynchus nerka) resident in Chignik River, Alaska, represents a departure from the lacustrine, pelagic existence typical of juveniles of this species. For this reason, the distribution, relative abundance in different parts of the river, growth, and upstream and downstream movements of juvenile sockeye in the river were studied during the summers of 1963 and 1964. The objectives of the study were to gain information on the possible origins of juvenile sockeye resident in Chignik River, and on the role of Chignik River in production of sockeye salmon. Distribution and abundance were estimated by seining and underwater observation. Juvenile sockeye appeared to be restricted to quiet waters along the shore. Catches of sockeye fry tended to increase through the summer, whereas catches of yearlings decreased. Smolts were taken in significant numbers only in June and July. early summer, large numbers of yearling sockeye were concentrated in Chignik River just below the outlet of Chignik Lake. In sockeye fry and yearlings captured in the lower river were generally larger than those captured in the upper river. Juvenile sockeye in the upper river grew slower than those in most other parts of the watershed. Scale analysis of sockeye salmon spawning in Chignik River showed that these fish entered the ocean at a larger size than did fish reared in Chignik Lake or Chignik River. This suggests that at least part of the progeny of river spawners do not remain in the river, but descend as fry to the brackish estuary, where growth conditions are superior. Upstream movement of schools of yearling sockeye was observed in the upper portions of the river. Such a movement has been observed many times in Chignik River in past years and has at times involved large numbers of fish. Schools of yearling sockeye have been observed to enter Chignik Lake. Fish of the same size group were captured while moving downstream at the lake outlet at night, suggesting a circular movement involving displacement of fish into the river at night and a positive rheotactic response causing them to re-enter the lake during the day. Juvenile sockeye salmon resident in Chignik River may include both progeny of river spawners, and fish which have moved down from Chignik Lake; Chignik Lake is probably the more important source. Chignik River is judged to have a minor role in the production of sockeye salmon, relative to the other rearing areas in the watershed.
Book Synopsis Genetic Differentiation of Sockeye Salmon (Oncorhynchus Nerka) Populations in the Wood River Lakes of Bristol Bay, Alaska by : Marcia Marie Bender
Download or read book Genetic Differentiation of Sockeye Salmon (Oncorhynchus Nerka) Populations in the Wood River Lakes of Bristol Bay, Alaska written by Marcia Marie Bender and published by . This book was released on 1998 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Serological Differentiation of Populations of Sockeye Salmon, Oncorhynchus Nerka by : George J. Ridgway
Download or read book Serological Differentiation of Populations of Sockeye Salmon, Oncorhynchus Nerka written by George J. Ridgway and published by . This book was released on 1958 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genetic Diversity of Sockeye Salmon (Oncorhynchus Nerka) of Cook Inlet, Alaska, and Its Application to Restoration of Injured Populations of the Kenai River by : Lisa Wishard Seeb
Download or read book Genetic Diversity of Sockeye Salmon (Oncorhynchus Nerka) of Cook Inlet, Alaska, and Its Application to Restoration of Injured Populations of the Kenai River written by Lisa Wishard Seeb and published by . This book was released on 1995 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genetic Relationships of Sockeye Salmon (Oncorhynchus Nerka) at Aniakchak National Monument and Preserve, Alaska by : Scott A. Pavey
Download or read book Genetic Relationships of Sockeye Salmon (Oncorhynchus Nerka) at Aniakchak National Monument and Preserve, Alaska written by Scott A. Pavey and published by . This book was released on 2004 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Population Genetic Structure and Life History Variability in Oncorhynchus Nerka from the Snake River Basin. Final Report by :
Download or read book Population Genetic Structure and Life History Variability in Oncorhynchus Nerka from the Snake River Basin. Final Report written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors used protein electrophoresis to examine genetic relationships among samples of sockeye salmon and kokanee (Oncorhynchus nerka) from the Snake River basin. A few collections from elsewhere in the Pacific Northwest were also included to add perspective to the analysis. After combining temporal samples that did not differ statistically within and between years, 32 different populations were examined for variation at 64 gene loci scored in all populations. Thirty-five (55%) of these gene loci surveyed were polymorphic in at least one population. Average heterozygosities were relatively low (0.006--0.041), but genetic differentiation among populations was pronounced: the value of Wright's F[sub ST] of 0.244 is higher than has been reported in any other study of Pacific salmon.
Book Synopsis Genetics of Sockeye Salmon (Oncorhynchus Nerka) in Katmai National Park and Preserve, Alaska by : Richard L. Wilmot
Download or read book Genetics of Sockeye Salmon (Oncorhynchus Nerka) in Katmai National Park and Preserve, Alaska written by Richard L. Wilmot and published by . This book was released on 1985 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Morphological, Life History and Genetic Comparison of Early and Late Run Sockeye Salmon (Oncorhynchus Nerka) of Bear Lake, Alaska by : Kristina M. Ramstad
Download or read book Morphological, Life History and Genetic Comparison of Early and Late Run Sockeye Salmon (Oncorhynchus Nerka) of Bear Lake, Alaska written by Kristina M. Ramstad and published by . This book was released on 1998 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Studies of Adult Sockeye Salmon (Oncorhynchus Nerka) at Chignik, Alaska, in 1969 and 1970 by : John West Wells
Download or read book Studies of Adult Sockeye Salmon (Oncorhynchus Nerka) at Chignik, Alaska, in 1969 and 1970 written by John West Wells and published by . This book was released on 1971 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Long-term Trends in the Growth of Sockeye Salmon (Oncorhynchus Nerka) from the Chignik Lakes, Alaska by : Joseph D. Bumgarner
Download or read book Long-term Trends in the Growth of Sockeye Salmon (Oncorhynchus Nerka) from the Chignik Lakes, Alaska written by Joseph D. Bumgarner and published by . This book was released on 1993 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
