Download or read book Salmon and Steelhead Stocks written by United States. Congress. Senate. Committee on Commerce, Science, and Transportation and published by . This book was released on 1979 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Salmon and Steelhead Stocks written by United States. Congress. Senate. Committee on Commerce, Science, and Transportation and published by . This book was released on 1979 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Salmon and Steelhead Stocks of Idaho written by Theodore C. Bjornn and published by . This book was released on 1960 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status of Major North American Stocks of Pacific Salmon and Steelhead written by Pacific Salmon Inter-agency Council (U.S.). Technical Committee and published by . This book was released on 1966 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status of Columbia River Salmon and Steelhead Trout written by Frederick Charles Cleaver and published by . This book was released on 1972 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stock Identification of Columbia River Chinook Salmon and Steelhead Trout 1986 Final Report written by and published by . This book was released on 1986 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the first time genetic similarities among chinook salmon and among steelhead trout stocks of the Columbia River were determined using a holistic approach including analysis of life history, biochemical, body shape and meristic characters. We examined between year differences for each of the stock characteristics and we also correlated the habitat characteristics with the wild stock characteristics. The most important principle for managing stocks of Columbia River chinook salmon and steelhead trout is that geographically proximal stocks tend to be like each other. Run timing and similarity of the stream systems should be taken into account when managing stocks. There are similarities in the classifications derived for chinook salmon and steelhead trout. Steelhead trout or chinook salmon tend to be genetically similar to other steelhead or chinook stocks, respectively, that originate from natal streams that are geographically close, regardless of time of freshwater entry. The primary exception Lo this trend is between stocks of spring and fall chinook in the upper Columbia River where fish with the different run timings are dissimilar, though geographically proximate stocks within a run form are generally very similar. Spring chinook stocks have stronger affinities to other spring chinook stocks that originate in the same side of the Cascade Range than to these Spring chinook stock: spawned on the other side of the Cascade Range. Spring chinook from west of the Cascades are more closely related to fall chinook than they are to spring chinook from east of the Cascades. Summer chinook can be divided into two main groups: (1) populations in the upper Columbia River that smolt as subyearlings and fall chinook stocks; and (2) summer chinook stocks from the Salmon River, Idaho, which smolt as yearlings and are similar to spring chinook stocks from Idaho. Fall chinook appear to comprise one large diverse group that is not easily subdivided into smaller subgroups. In general, upriver brights differ from tules by at least one locus. Steelhead stocks can be divided into two main groups: (1) those stocks found east of the Cascades; and (2) those stocks found west of the Cascade Mountains. Steelhead from west of the Cascades are divisable into three subgroups of closely related stocks: (1) a group comprised mainly of wild winter steelhead from the lower Columbia River; (2) Willamette River hatchery and wild winter steelhead; and (3) summer and winter hatchery steelhead stocks from both the lower Columbia and Willamette Rivers. Steelhead from east of the Cascades are separable into three subgroups of closely related stocks: (1) wild summer steelhead; (2) a group comprised mainly of hatchery summer steelhead stocks; and (3) other hatchery and wild steelhead from Idaho. Streams east and west of the Cascades can be differentiated using characters including precipitation, elevation, distance from the mouth of the Columbia, number of frost-free days and minimum annual air temperature. There are significant differences among the stocks of chinook salmon and steelhead trout for each of the meristic and body shape characters. Between year variation does not account for differences among the stocks for the meristic and body shape characters with the exception of pelvic fin ray number in steelhead trout. Characters based on body shape are important for discriminating between the groups of hatchery and wild steelhead stocks. We could not determine whether the basis for the differences were genetic or environmental. The reason for the variation of the characters among stocks is as yet unclear. Neutrality or adaptiveness has not been firmly demonstrated.
Download or read book Supplementation of Salmon and Steelhead Stocks with Hatchery Fish written by Cleveland R. Steward and published by . This book was released on 1990 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stock Identification of Columbia River Chinook Salmon and Steelhead Trout 1984 1985 Annual Report written by and published by . This book was released on 1985 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fish were collected from 60 stocks of chinook salmon and 62 stocks of steelhead trout. Electrophoretic analyses were completed on 43 stocks of chinook salmon and 41 stocks of steelhead trout and meristic counts were completed on 43 stocks of chinook and 41 stocks of steelhead. Statistical comparisons between year classes of our electrophoretic data indicate that most enzyme systems are stable over time but some may be dynamic and should be used with caution in our analyses. We also compared neighboring stocks of both spring chinook and steelhead trout. These comparisons were between stocks of the same race from adjacent stream systems and/or hatcheries. Differences in isozyme gene frequencies can be used to estimate genetic segregation between pairs of stocks. Analysis of the chinook data suggests that, as expected, the number of statistically significant differences in isozyme gene frequencies increases as the geographic distance between stocks increases. The results from comparisons between adjacent steelhead stocks were inconclusive and must await final analysis with more data. Cluster analyses using either isozyme gene frequencies or meristic characters both tended to group the chinook and steelhead stocks by geographic areas and by race and both methods resulted in generally similar grouping patterns. However, cluster analyses using isozyme gene frequencies produced more clusters than the analyses using meristic characters probably because of the greater number of electrophoretic characters compared to the number of meristic characters. Heterozygosity values for each stock were computed using the isozyme gene frequencies. The highest heterozygosity values for chinook were observed in summer chinook and the hatchery stocks while the lowest values were observed in the spring chinook and wild stocks. The results of comparisons of heterozygosity values among areas were inconclusive. The steelhead heterozygosity values were higher in the winter stocks than in the summer stocks and similar between hatchery and wild stocks. Heterozygosity values among the areas were very similar for the steelhead stocks. Analysis of variance tests indicate that significant differences exist among the stocks for scales in the lateral series, scale rows above the lateral line, anal rays, dorsal rays, vertebrae and paired fin rays for both steelhead and chinook. Tests on gill raker and branchiostegal counts will be conducted when those counts are completed. Morphometric characters were compared between fed and starved groups of steelhead trout to determine which characters may be affected by condition factor or fatness of the fish. The results show that the linear characters, some head measurements and the truss-type characters in the caudal peduncle are most likely to be unaffected by condition factor. The measurements in the gut area of the fish appear to be unsuitable for discriminating among the stocks since they are highly affected by condition factor.
Download or read book 1992 Washington State Salmon and Steelhead Stock Inventory written by Washington (State). Department of Fish and Wildlife and published by . This book was released on 1993 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Valuation of Selected Columbia River Salmon and Steelhead Fishery Stocks Originating Above Rock Island Dam written by J. W. Currie and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Identification of Salmon and Steelhead Stocks in the Mid Columbia River written by William K. Hershberger and published by . This book was released on 1987 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Salmon and Steelhead Stock Summaries for the Lower Columbia River Basin written by and published by . This book was released on 1994 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Washington State Salmon and Steelhead Stock Inventory written by Washington Department of Fish and Wildlife and published by . This book was released on 1993 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Columbia Basin Upriver Salmon and Steelhead Stocks Status Information Relative to Consideration Under the Endangered Species Act written by and published by . This book was released on 1979 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Salmon and Steelhead Stock Summaries for the Lower Columbia River Basin Below Bonneville Dam written by Oregon. Department of Fish and Wildlife and published by . This book was released on 1993 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Salmon and Steelhead Stocks written by United States. Congress. Senate. Committee on Commerce, Science, and Transportation and published by . This book was released on 1979 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book How Healthy are Healthy Stocks written by Peter F. Bahls and published by . This book was released on 2001 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt:
