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首页> 美国政府科技报告 >Comparing the Reproductive Success of Yakima River Hatchery- and Wild-Origin Spring Chinook. Yakima/Klickitat Fisheries Project Monitoring and Evaluation. Annual Report 2005-2006
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Comparing the Reproductive Success of Yakima River Hatchery- and Wild-Origin Spring Chinook. Yakima/Klickitat Fisheries Project Monitoring and Evaluation. Annual Report 2005-2006

机译：比较亚基马河孵化场和野生起源春季奇努克的繁殖成功。 Yakima / Klickitat渔业项目监测和评估。 2005 - 2006年度报告

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This years annual report has been split into two separate parts. Part 1 describes our efforts to link behavioral traits in males to their reproductive success (RS) in the populations that were placed into the observation stream in 2001. The second part is an appendix (Appendix A) that describes similar analyses performed on hatchery and wild males placed into the observation stream in 2004. Below is an abstract that summarizes the results obtained from our comparisons of male RS in the 2001 populations: Reproductive success in wild- and first generation hatchery-origin spring Chinook males was examined by allowing the fish to compete for spawning opportunities in two sections of an observation stream. Behavioral observations were used to characterize the frequency of aggression and courting activities. Microsatellite DNA from each male and fry collected from the observation stream were used in pedigree analyses to estimate reproductive success. The coefficient of variation in male reproductive success equaled 116 and 86% in the two populations. No differences were detected in reproductive success due to hatchery or wild origin. Nor were any behavioral differences found between hatchery and wild males. Although statistical power was low due to intrinsic variation a great deal of overlap existed in the reproductive success values of hatchery and wild males. Significant disparities existed among the males on their ability to produce offspring. Males achieving high reproductive success mated with numerous females, were socially dominant, aggressive, and tended to stay in localized areas, courting and spawning with females that were adjacent to one another.

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