Comparison of competitive ability between native and introduced salmonids: evidence from pairwise contests
Comparison of competitive ability between native and introduced salmonids: evidence from pairwise contests
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DOI：
10.1007/s10228-004-0214-x
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发表时间：
2004-08-01
影响因子：
1.2
通讯作者：
Maekawa, K
中科院分区：
文献类型：
--
作者：
Hasegawa, K;Yamamoto, T;Maekawa, K
在日本的北海道，褐鳟鱼，萨尔莫和虹鳟鱼已经被引入淡水。今天，人们认识到这些引入的鲑科鱼类对本地鲑科鱼类如白斑红点鲑、亮斑红点鲑和马苏鲑、O. masou特别是，种间竞争可能是一个重要的机制，可能有助于本地鲑鱼的排斥。在这项研究中，实验成对竞争进行了比较干扰竞争能力之间的本地和引进的鲑鱼。我们证明，棕色鳟鱼的竞争力上级的白斑红点鲑和马苏鲑鱼，而虹鳟鱼的上级白斑红点鲑。我们认为，引进褐鳟鱼对白斑红点鲑和马苏鲑鱼都有负面影响，引进虹鳟鱼对白斑红点鲑有负面影响。
Brown trout, Salmo trutta, and rainbow trout, Oncorhynchus mykiss, have been introduced to freshwaters in Hokkaido, Japan. Today, it is recognized that these introduced salmonids have negative impacts on native salmonids such as white-spotted charr, Salvelinus leucomaenis, and masu salmon, O. masou. In particular, interspecific competition may be an important mechanism that could contribute to the exclusion for native salmonids. In this study, experimental pairwise contests were conducted to compare interference competitive ability between native and introduced salmonids. We demonstrated that brown trout were competitively superior to white-spotted charr and masu salmon whereas rainbow trout were superior to white-spotted charr. We suggest that introduced brown trout negatively impact both white-spotted charr and masu salmon, and introduced rainbow trout negatively impact white-spotted charr.