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首页> 美国卫生研究院文献>PLoS Clinical Trials >The Effect of Hatchery Release Strategy on Marine Migratory Behaviour and Apparent Survival of Seymour River Steelhead Smolts (Oncorhynchus mykiss)
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The Effect of Hatchery Release Strategy on Marine Migratory Behaviour and Apparent Survival of Seymour River Steelhead Smolts (Oncorhynchus mykiss)

机译：孵化场放养策略对西摩河河鲈（Oncorhynchus mykiss）海洋迁徙行为和表观存活的影响

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Early marine migratory behaviour and apparent survival of hatchery-reared Seymour River steelhead (Oncorhynchus mykiss) smolts was examined over a four year period (2006–2009) to assess the impact of various management strategies on improving early marine survival. Acoustically tagged smolts were released to measure their survival using estuary and coastal marine receivers forming components of the Pacific Ocean Shelf Tracking (POST) array. Early marine survival was statistically indistinguishable between releases of summer run and winter run steelhead races, night and day releases, and groups released 10 days apart. In 2009, the survival of summer run steelhead released into the river was again trialed against groups released directly into the ocean at a distance from the river mouth. Apparent survival was improved significantly for the ocean released groups. The health and physiological status of the various release groups were monitored in years 2007–2009, and results indicate that the fish were in good health, with no clinical signs of disease at the time of release. The possibility of a disease event contributing to early marine mortality was further examined in 2009 by vaccinating half of the released fish against common fish diseases (vibriosis, furunculosis). The results suggest that marine survival may be enhanced using this approach, although not to the extent observed when the smolts were transported away from the river mouth before release. In summary, direct experimental testing of different release strategies using the POST array to measure ocean survival accelerated the scientific process by allowing rapid collection of data which enabled the rejection of several existing theories and allowed tentative identification of several new alternative approaches that might improve early marine survival of Seymour River steelhead.
机译：在四年（2006-2009年）内检查了孵化场饲养的西摩河河鲈（Oncorhynchus mykiss）的早期海洋迁移行为和表观存活率，以评估各种管理策略对改善早期海洋生存的影响。使用构成太平洋货架跟踪（POST）阵列组件的河口和沿海海洋接收器，释放经过声学标记的大软体动物，以测量其生存。在夏季和冬季运行的硬头竞走，白天和黑夜的释放以及各组相隔10天的释放之间，早期的海洋生存在统计学上是无法区分的。 2009年，再次针对在河口远处直接释放到海洋中的团体，对释放到河中的夏季跑头的生存进行了再次试验。海洋释放组的表观存活率显着提高。在2007-2009年间对各个释放组的健康和生理状况进行了监测，结果表明这些鱼健康状况良好，释放时没有临床疾病迹象。 2009年，通过对一半释放的鱼类接种普通鱼类疾病（弧菌病，糠un病）的疫苗，进一步检查了疾病事件可能导致早期海洋死亡的可能性。结果表明，使用这种方法可以提高海洋的生存能力，尽管在释放之前从河口运走这些软体动物时并没有达到观察到的程度。总而言之，使用POST阵列测量海洋存活率的不同释放策略的直接实验测试通过允许快速收集数据来加快科学进程，从而可以拒绝现有的几种理论，并初步鉴定出可能改善早期海洋生存能力的几种新方法。西摩河河鳟的生存。

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