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首页> 外文期刊>The Open Fish Science Journal >The Early Marine Biology of the Hatchery/Wild Juvenile Salmonid(Oncorhynchus sp.) Community in Barkley Sound, Canada
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The Early Marine Biology of the Hatchery/Wild Juvenile Salmonid(Oncorhynchus sp.) Community in Barkley Sound, Canada

机译：加拿大巴克利桑德的孵化场/野生少年鲑鱼（Oncorhynchus sp。）群落的早期海洋生物学

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We conducted 11 purse seine/beachseine surveys over the summers of 2000 and 2001 to learn about the migrationtiming, distribution, and diet of hatchery chinook (Oncorhynchus tshawytscha) and coho (O. kisutch), and wild chinook,coho, sockeye (O. nerka) and chum (O. keta) juvenile salmon, in Barkley Sound, West Coast Vancouver Island. Juvenilesalmon partitioned Barkley Sound by time and space, and by diet except for hatchery and wild coho. The analysisof migration timing included historic data for 1987-89, and results showed that timing differed between species and wasconsistent over years. Sockeye and chum dominated the juvenile salmon community until mid-June and hatchery and wildchinook dominated subsequently. Fish tended to be dispersed contagiously. Results of correlation analyses of catch suggestedthat fish of different origins and species did not co-occur. The euphausiid Thysanoessa spinifera was an importantprey item but different fish species selected different sizes of T. spinifera at different times. The diet overlap betweenhatchery and wild coho did not affect return. Migration timing for sockeye and wild coho seems to reflect a strategy to enterthe ocean when the biomass of the size fraction of T. spinifera that each species selects is likely to be maximal. Descriptionsof migration timing, fish interactions, and diet provide information which appears to be useful for learningabout the biological basis of salmon return variability.
机译：我们在2000年和2001年夏天进行了11次围网围网/海滩围网调查，以了解孵化场chinook（Oncorhynchus tshawytscha）和coho（O. kisutch）以及野生chinook，coho，sockeye（O. nerka）和密苏里州（O. keta）的幼鲑，在西海岸温哥华岛的巴克利湾。幼鲑将巴克利峡湾按时空划分，并按饮食划分，孵化场和野生银鳕除外。对迁徙时间的分析包括1987-89年的历史数据，结果表明，不同物种之间的时间差异很大，并且多年以来保持一致。红鲑鱼和杂草一直主导着少年鲑鱼群落，直到六月中旬，孵化场和野chinookook随后占据主导地位。鱼易于传染。渔获量的相关分析结果表明，不同产地和种类的鱼没有共生。大戟类Thysanoessa spinifera是一个重要的猎物，但是不同的鱼类在不同的时间选择了不同大小的T. spinifera。孵化场和野生银鳕之间的饮食重叠不会影响返回。当每个物种选择的棘枝菊的大小部分的生物量可能达到最大时，红大马和野生银鹭的迁移时间似乎反映了一种进入海洋的策略。迁移时间，鱼类相互作用和饮食的描述提供了对于了解鲑鱼返回变异的生物学基础似乎有用的信息。

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