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Phenotypic Comparison Of Hatchery And Wild Coho Salmon Oncorhynchus Kisutch In Oregon Washington And California
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Book Synopsis Phenotypic Comparison of Hatchery and Wild Coho Salmon (Oncorhynchus Kisutch) in Oregon, Washington, and California by : Randy Carl Hjort
Download or read book Phenotypic Comparison of Hatchery and Wild Coho Salmon (Oncorhynchus Kisutch) in Oregon, Washington, and California written by Randy Carl Hjort and published by . This book was released on 1979 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phenotypic similarities of coho salmon (Oncorhynchus kisutch) stocks from Oregon, Washington, and California were compared using agglomerative and divisive cluster analyses. The phenotypic characters evaluated included the following: 1) the isozyme gene frequencies of transferrin and phosphoglucose isomerase; 2) the life history characters time of peak spawning and proportion of females in the population; and 3) the morphological characters scales in the lateral series, scales above the lateral line, anal rays, gill rakers, branchiostegal rays and vertebrae. Coho salmon stocks from similar environments were phenotypically similar. The groups of stocks found to be similar by the agglomerative cluster analysis were: 1) wild stocks from the northern Oregon coast; 2) wild stocks from the southern Oregon coast; 3) stocks from hatcheries using wild coho salmon for an egg source; 4) stocks from large stream systems; and 5) hatchery stocks from the northern Oregon coast. There were three trends involved with the clustering patterns: 1) stocks that are geographically close tend to be phenotypically similar; 2) stocks from large stream systems were more similar to each other than to stocks from smaller stream systems, independent of geographic nearness; and 3) hatchery stocks were more similar to each other than to wild stocks, even those in their respective stream systems, and wild stocks were more similar to each other than to hatchery stocks, even those in their respective stream systems. These trends may be useful to fishery managers for selecting donor stocks from hatcheries for transplanting to stream systems or other hatcheries. Individual phenotypic characters were correlated with characters of the stream systems. Two agglomerative cluster analyses of the characters of the stocks and the characters of the stream system were used to determine whether stream types corresponded to phenotype- types. The clustering patterns of phenotypic characters of the stocks were not similar to the clustering found for characteristics of the stream systems from which the stocks came.
Download or read book Fishery Bulletin written by and published by . This book was released on 1996 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sport Fishery Abstracts written by and published by . This book was released on 1991 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genetic Variability in Hatchery and Wild Populations of Coho Salmon Oncorhynchus Kisutch in Oregon by : Paul Gordon Olin
Download or read book Genetic Variability in Hatchery and Wild Populations of Coho Salmon Oncorhynchus Kisutch in Oregon written by Paul Gordon Olin and published by . This book was released on 1984 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis North Pacific Salmonid Enhancement Programs and Genetic Resources by : Michael D. Kelly
Download or read book North Pacific Salmonid Enhancement Programs and Genetic Resources written by Michael D. Kelly and published by . This book was released on 1990 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Phenotypic Divergence Between Hatchery Pink and Coho Salmon and Their Wild Counterparts by : Alexandra G. Reich
Download or read book Phenotypic Divergence Between Hatchery Pink and Coho Salmon and Their Wild Counterparts written by Alexandra G. Reich and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interbreeding between hatchery and wild Pacific salmon (Oncorhynchus spp.) is an ongoing management concern, particularly when hatchery Pacific salmon possess divergent phenotypes. This project investigated the potential domestication of hatchery Pacific salmon from the relaxation of natural and sexual selection; such divergence might reduce wild Pacific salmon fitness if strays interbreed with natural-born fish. In Southeast Alaska, U.S.A., we compared two years (even- and odd-year lines) of hatchery pink salmon (Oncorhynchus gorbuscha) and one year of hatchery coho salmon (O. kisutch) to their wild source populations to characterize divergence in phenotypes associated with mating and reproductive success. Specifically, we examined secondary sexual traits in males and fecundity and egg quality traits in females. Due to the relaxation of natural and sexual selection in the hatchery during the spawning period, we expected to observe hatchery male Pacific salmon with shorter snouts and smaller humps and hatchery female Pacific salmon with a larger gonadosomatic index (GSI), smaller eggs, and lower egg energy and lipid density when compared to their wild counterparts. Hatchery-wild differences in GSI and egg size in coho salmon females and snout length and body depth (a proxy measurement for hump size) in odd-year pink salmon males supported our hypotheses. However, hatchery coho salmon males had larger snouts and body depths than the wild coho salmon males and odd-year pink hatchery eggs were larger than the eggs of their wild counterparts, contrary to our hypotheses. No differences were observed in coho salmon egg composition, even- and odd-year female pink salmon GSI, even-year pink salmon egg size, and even-year pink salmon male snout and body depth. While the results were mixed, we found evidence that hatchery rearing alters reproductive traits. Our results underscore the need to better understand the possible biological consequences of altered reproductive traits on wild populations, including comprehensive marking of hatchery releases to identify strays, monitoring of phenotypes in hatchery populations, and consideration of hatchery practices that will reduce domestication.
Book Synopsis Pacific Salmon & their Ecosystems by : Deanna J. Stouder
Download or read book Pacific Salmon & their Ecosystems written by Deanna J. Stouder and published by Springer Science & Business Media. This book was released on 2012-02-02 with total page 681 pages. Available in PDF, EPUB and Kindle. Book excerpt: The symposium "Pacific Salmon and Their Ecosystems: Status and Future Options',' and this book resulted from initial efforts in 1992 by Robert J. Naiman and Deanna J. Stouder to examine the problem of declining Pacific salmon (Oncorhynchus spp.). Our primary goal was to determine informational gaps. As we explored different scientific sources, state, provincial, and federal agencies, as well as non-profit and fishing organizations, we found that the information existed but was not being communicated across institutional and organizational boundaries. At this juncture, we decided to create a steering committee and plan a symposium to bring together researchers, managers, and resource users. The steering committee consisted of members from state and federal agencies, non-profit organizations, and private industry (see Acknowledgments for names and affiliations). In February 1993, we met at the University of Washington in Seattle to begin planning the symposium. The steering committee spent the next four months developing the conceptual framework for the symposium and the subsequent book. Our objectives were to accomplish the following: (1) assess changes in anadromous Pacific Northwest salmonid populations, (2) examine factors responsible for those changes, and (3) identify options available to society to restore Pacific salmon in the Northwest. The symposium on Pacific Salmon was held in Seattle, Washington, January 10-12, 1994. Four hundred and thirty-five people listened to oral presentations and examined more than forty posters over two and a half days. We made a deliberate attempt to draw in speakers and attendees from outside the Pacific Northwest.
Download or read book Fisheries Review written by and published by . This book was released on 1991 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Status Review of Coho Salmon from Washington, Oregon, and California by : Laurie Ann Weitkamp
Download or read book Status Review of Coho Salmon from Washington, Oregon, and California written by Laurie Ann Weitkamp and published by . This book was released on 1995 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the Stock Identification Workshop by : Herman E. Kumpf
Download or read book Proceedings of the Stock Identification Workshop written by Herman E. Kumpf and published by . This book was released on 1987 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The identification of discrete resource units, whether they be called stocks, populations, migratory groups or management units, is critical to the effective management of our aquatic resources. Advances in techniques and equipment have been made in recent years in the area of such identifications. A workshop to review these advances was organized by the Panama City Laboratory of the Southeast Fisheries Center, National Marine Fisheries Service. It was held at the Miracle Mile Complex, Panama City Beach, Florida, Nov. 4-6, 1985. The major objective of the Stock Identification Workshop was to gain a more comprehensive understanding of stock identification problems and approaches to their solutions. The workshop was designed to give an opportunity to the participants to share information on methods of stock identification and to review their application to aquatic resources. The program format consisted of three sections--" Preface, paragraphs 1-2.
Download or read book NOAA Technical Report NMFS. written by and published by . This book was released on 1984 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Differentiation of Hatchery and Stream Juvenile Coho Salmon (Oncorhynchus Kisutch) from Washington and Oregon by the Use of Scales and Otoliths by : Thomas Hughes Peck
Download or read book Differentiation of Hatchery and Stream Juvenile Coho Salmon (Oncorhynchus Kisutch) from Washington and Oregon by the Use of Scales and Otoliths written by Thomas Hughes Peck and published by . This book was released on 1970 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stock Identification Methods by : Lisa A. Kerr
Download or read book Stock Identification Methods written by Lisa A. Kerr and published by Elsevier. This book was released on 2004-10-15 with total page 735 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stock Identification Methods provides a comprehensive review of the various disciplines used to study the population structure of fishery resources. It represents the worldwide experience and perspectives of experts on each method, assembled through a working group of the International Council for the Exploration of the Sea. The book is organized to foster interdisciplinary analyses and conclusions about stock structure, a crucial topic for fishery science and management. Technological advances have promoted the development of stock identification methods in many directions, resulting in a confusing variety of approaches. Based on central tenets of population biology and management needs, Stock Identification Methods offers a unified framework for understanding stock structure by promoting an understanding of the relative merits and sensitivities of each approach. * Describes eighteen distinct approaches to stock identification grouped into sections on life history traits, environmental signals, genetic analyses, and applied marks* Features experts' reviews of benchmark case studies, general protocols, and the strengths and weaknesses of each identification method* Reviews statistical techniques for exploring stock patterns, testing for differences among putative stocks, stock discrimination, and stock composition analysis* Focuses on the challenges of interpreting data and managing mixed-stock fisheries
Book Synopsis Endangered and Threatened Species ; Threatened Status for Southern Oregon/Northern California Coast Evolutionarily Significant Unit (ESU) of Coho Salmon by :
Download or read book Endangered and Threatened Species ; Threatened Status for Southern Oregon/Northern California Coast Evolutionarily Significant Unit (ESU) of Coho Salmon written by and published by . This book was released on 1997 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Salmon Culture, January 1979-September 1988 by : Deborah T. Hanfman
Download or read book Salmon Culture, January 1979-September 1988 written by Deborah T. Hanfman and published by . This book was released on 1989 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aquaculture Production Systems by : Deborah T. Hanfman
Download or read book Aquaculture Production Systems written by Deborah T. Hanfman and published by . This book was released on 1989 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of Salmon and Steelhead Supplementation by : William H. Miller
Download or read book Analysis of Salmon and Steelhead Supplementation written by William H. Miller and published by . This book was released on 1990 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
