Differential use of the Campbell River estuary, British Columbia, by wild and hatchery-reared juvenile chinook salmon (Oncorhynchus tshawytscha)
Differential use of the Campbell River estuary, British Columbia, by wild and hatchery-reared juvenile chinook salmon (Oncorhynchus tshawytscha)
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野生和孵化场饲养的幼年奇努克鲑鱼 (Oncorhynchus tshawytscha) 对不列颠哥伦比亚省坎贝尔河口的不同利用
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
B. D. Chang
中科院分区：
文献类型：
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作者：
C. Levings;C. D. Mcallister;B. D. Chang
1982年3月至1983年12月，通过海滩围网对坎贝尔河河口和发现通道附近水域的大鳞大麻哈鱼幼鱼（Oncorhynchus tshawytscha）进行了采样，以检查野生和孵化种群对河口的利用情况。野生奇努克幼鱼以迁徙鱼苗的形式进入河口，主要在4月下旬至6月出现在河口区，5月中旬至7月出现在过渡区，7月出现在海洋区。 5月初至7月初放流孵化场鱼。河口和过渡区野生种群的最大捕获量相似，而过渡区大多数孵化场种群的最大捕获量较高。对于野生和孵化场奇努克鱼来说，海洋区域的捕获量远低于河口和过渡区域。野生鱼苗在河口停留 40-60 天，而大多数孵化场鱼类在河口停留的时间大约有一半。 5 月至 9 月，野生种群的平均尺寸增长速度相对稳定。更高的...
From March 1982 to December 1983, juvenile chinook salmon (Oncorhynchus tshawytscha) were sampled by beach-seine in the Campbell River estuary and adjacent waters of Discovery Passage in order to examine estuarine use by wild and hatchery stocks. Wild juvenile chinook entered the estuary as migrant fry and were present in the estuarine zone mainly in late April to June, in the transition zone in mid-May to July, and in the marine zone in July. Hatchery fish were released from early May to early July. Maximum catches of wild stocks were similar in the estuarine and transition zones, while the maximum catches of most hatchery stocks were higher in the transition zone. For both wild and hatchery chinook, catches in the marine zone were much lower than in the estuarine and transition zones. Wild fry resided in the estuary for 40–60 d, while most hatchery fish used the estuary for about one-half this period. Wild stocks showed a relatively constant rate of increase in mean size from May to September. Higher ra...