Redd superimposition by introduced rainbow trout,oncorhynchus mykiss, on native charrs in a japanese stream
Redd superimposition by introduced rainbow trout,oncorhynchus mykiss, on native charrs in a japanese stream
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引进的虹鳟鱼（oncorhynchus mykiss）在日本溪流中对本地红点鲑进行红色叠加
DOI：
10.1007/bf02684235
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发表时间：
2007
影响因子：
1.2
通讯作者：
S. Nakano
中科院分区：
文献类型：
--
作者：
Y. Taniguchi;Yo Miyake;Toshihiko Saito;Hirokazu Urabe;S. Nakano
在日本北海道的一条小溪中，研究了引进的春季产卵的彩虹鲑鱼Oncorhynchus mykis和秋季产卵的本地多莉·瓦尔登(Dolly Varden)、Salvelinus Malma和白点斑点彩虹鲑鱼(S.leucomaenis)的产卵重叠情况。1997年秋季观察到Dolly Varden和白色斑点的溪流与1998年春季记录到的彩虹鲑鱼红色的河段有很大重叠。鲑鱼和两种炭鱼的产卵微生境也相似。分别有13%和3%的多莉·瓦登和白点炭红色被彩虹鲑鱼红色叠加。被扰乱的红炭中的卵或羊毛虫蛋白可能受到破坏，因为在叠加发生之前，红炭不太可能已经从红炭中出现。在数量足够多的情况下，引入的彩虹鲑鱼可能会通过赶走当地碳鱼产卵的红色而对当地的碳鱼种群产生负面影响。
Spawning redd superimposition of introduced, spring-spawning rainbow trout,Oncorhynchus mykiss, on native, fall-spawning Dolly varden,Salvelinus malma, and white-spotted charr,S. leucomaenis, were examined in a small stream in Hokkaido, Japan. The stream reaches in which Dolly Varden and white-sported charr redds were observed in fall 1997 greatly overlapped with the reaches in which rainbow trout redds were recorded in spring 1998. Spawning microhabitats were also similar between trout and the two charr species. Thirteen and 3% of Dolly Varden and white-spotted charr redds, respectively, were superimposed by rainbow trout redds. The eggs or alevins in the disturbed charr redds were potentially damaged because charrs were not likely to have emerged from the redds before the superimposition occurred. In sufficiently great abundance, introduced rainbow trout may negatively impact native charr populations by dislodging the latter’s spawning redds.