Microhabitat Partitioning among Stream-Dwelling juvenile Coho Salmon, Oncorhynchus kisutch, and Dolly Varden, Salvelinus malma
Microhabitat Partitioning among Stream-Dwelling juvenile Coho Salmon, Oncorhynchus kisutch, and Dolly Varden, Salvelinus malma
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溪流栖息的幼年银鲑鱼、Oncorhynchus kisutch 和 Dolly Varden、Salvelinus malma 之间的微生境划分
DOI：
10.1139/f90-256
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发表时间：
1990
影响因子：
2.4
通讯作者：
Cordon H. Reeves
中科院分区：
文献类型：
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作者：
C. A. Dolloff;Cordon H. Reeves
研究了阿拉斯加威尔士王子岛天然溪流和实验室河道中0+、1+和1+年龄的coho salmon （Oncorhynchus kisutch）和0+、1+和2+年龄的Dolly Varden （Salvelinus malma）对微生境的利用和划分。银鲑占据了水中的位置，它们保护自己不受其他鱼类的侵害。多莉·瓦尔登与河底关系更密切，很少有领土意识。对于每个物种，水的深度、焦点的深度和到最近的鱼的距离随着鱼的大小而增加，而到最近的覆盖的距离随着鱼的大小而减少。大多数鱼类选择的焦点速度在0.0-9.0 cm∙s−1之间。木质碎屑是最常用的覆盖类型，大多数鱼类出现在颗粒直径为2-100毫米的砾石基质上。实验室中每个物种对生境的利用与在野外观察到的模式相似。无论是单独还是有其他物种存在时，每个物种都占据着相似的栖息地。Alth……
Microhabitat use and partitioning among age 0+ and 1+ coho salmon, Oncorhynchus kisutch, and age 0+, 1+ and 2+ Dolly Varden, Salvelinus malma, was studied in small (<2 m wide), natural streams on Prince of Wales Island, Alaska, and in laboratory stream channels. Coho salmon occupied midwater positions that they defended from other fish. Dolly Varden were more closely associated with the stream bottom and were seldom territorial. For each species, the depth of water, depth of focal point, and distance to nearest fish increased with fish size, whereas the distance to nearest cover decreased as fish size increased. Most fish selected focal point velocities between 0.0–9.0 cm∙s−1.Woody debris was the most frequently used cover type and most fish occurred over gravel substrates ranging from 2–100 mm particle diameter. Habitat use by each species in the laboratory was similar to the pattern observed in the field. Each species occupied similar habitats both when alone and when the other species was present. Alth...