The effects of introduced salmonids on two native stream‐dwelling salmonids through interspecific competition
The effects of introduced salmonids on two native stream‐dwelling salmonids through interspecific competition
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DOI：
10.1111/j.0022-1112.2006.00997.x
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发表时间：
2006-04
影响因子：
2
通讯作者：
K. Hasegawa;K. Maekawa
中科院分区：
文献类型：
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作者：
K. Hasegawa;K. Maekawa
利用人工河道，实验研究了两种同域本地鲑科鱼在引进鲑科鱼存在和不存在的情况下对生境的利用。当只有本地白斑鲑Salvelinus leucomaenis和masu salmon Oncorhynchus mason同域时，它们占据不同的微生境。然而，在引进褐鳟Salmo trutta或虹鳟Oncorhynchus mykiss的情况下，观察到白斑鲑和马苏鲑使用相似的栖息地，并引发了白斑鲑和马苏鲑之间的种间竞争。研究表明，本地鲑科与引进鲑科之间的种间竞争对本地鲑科的共存产生了负面影响。
Using an artificial stream, habitat use by two sympatric native salmonids in the presence and absence of introduced salmonid species was investigated experimentally. When only native white-spotted charr Salvelinus leucomaenis and masu salmon Oncorhynchus mason were sympatric, they occupied different microhabitats. In the presence of introduced brown trout Salmo trutta or rainbow trout Oncorhynchus mykiss, however, white-spotted charr and masu salmon were observed to use a similar habitat and interspecific competition between white-spotted charr and masu salmon was initiated. The study suggested that the coexistence of native salmonids was negatively affected through interspecific competition between native and introduced salmonids.