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Hatchery and Wild Stock Interactions of Juvenile Chum Salmon in Marine Waters of Southeastern Alaska: A Bioenergetics Approach

机译:阿拉斯加东南部海水中幼鲑的孵化场与野生种群的相互作用:一种生物能学方法

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As part of the Southeastern Alaska Coastal Monitoring project, the interactions of hatchery and wild stocks of juvenile chum salmon (Oncorhynchus keta) migrating seaward were studied in littoral (nearshore) and neritic (epipelagic offshore) marine habitats in southeastern Alaska. Bioenergetics modeling was used to estimate prey consumption by different salmon stock groups during their first five months at sea. Model runs were completed using biophysical data collected in Icy Strait, a regional salmon migration corridor, in May, June, July, August, and September of 2001 (Fig. 1). These data included: temperature (l-m surface versus surface to 20-m average), zooplankton standing crop (surface to 20-m depth versus entire water column), salmon diet (percent weight of prey type consumed), and energy densities, weight, and growth of juvenile chum salmon.
机译:作为东南阿拉斯加沿海监测项目的一部分,研究了孵化场和野生种群鲑向海洋迁移的孵化场鲑(Oncorhynchus keta)在阿拉斯加东南沿海(近岸)和中性(近海沿岸近海)生境中的相互作用。使用生物能学模型来估计不同鲑鱼种群在头五个月在海上的猎物消耗。使用2001年5月,6月,7月,8月和9月的区域鲑鱼迁徙走廊冰冷海峡收集的生物物理数据完成了模型运行(图1)。这些数据包括:温度(lm表面相对于表面到20 m的平均水平),浮游动物站立的作物(表面20 m深度对整个水柱的深度),鲑鱼饮食(所消耗猎物的重量百分比)以及能量密度,重量,和幼鲑的生长。

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