Stream Habitats and Behavioral Interactions of Underyearling and Yearling Atlantic Salmon (Salmo salar)
Stream Habitats and Behavioral Interactions of Underyearling and Yearling Atlantic Salmon (Salmo salar)
复制标题
大西洋鲑 (Salmo salar) 一岁以下和一岁以下的溪流栖息地和行为相互作用
DOI：
10.1139/f78-029
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发表时间：
1978
期刊：
影响因子：
--
通讯作者：
M. Héland
中科院分区：
文献类型：
--
作者：
P. Symons;M. Héland
通过对西北米拉米奇河 20 多年的数据以及纳什瓦克河小支流的一些额外数据的检查，在平均水流速度为 50-65cm/s 的地点，每 100m2 发现了最高密度的 100 条小鲑鱼和 80 条一岁以上的大西洋鲑鱼 (Salmo salar)。在水速较低或较高的地点，最大观测密度降低。在实验室溪流中进行的实验表明，一岁以下的大西洋鲑鱼（直径为 30 厘米）会与巨石（直径 > 25.6 厘米）一起划流。在这些较深的栖息地中，> 10 厘米的一岁鸽通过追逐< 6 厘米的一岁鸽，有时甚至通过捕捉和吃掉它们，减少了它们的数量。社会互动，例如用于领土防御的展示，在一岁鸽和一岁以下的鸽子之间不会发生，直到后者超过 6.5 厘米，这是它们所要求的尺寸。
From an examination of over 20 yr of data from the Northwest Miramichi River and some additional data from small tributaries to the Nashwaak River, highest densities of 100 underyearling and 80 yearling or older Atlantic salmon (Salmo salar) per 100 m2 were found at sites where water velocities averaged 50–65 cm/s. At sites with lower or higher water velocities maximum observed densities decreased. Experiments in laboratory streams demonstrated that underyearling Atlantic salmon 30 cm) riffles with boulders (> 25.6 cm diam). Yearlings > 10 cm reduced the numbers of underyearlings < 6 cm in these deeper habitats by chasing them, and occasionally by catching and eating them. Social interactions, such as displays used in territorial defence, did not occur between yearlings and underyearlings until the latter exceeded 6.5 cm, the size at which they beg...