A light intensity threshold for schooling in the Atlantic mackerel, Scomber scombrus
A light intensity threshold for schooling in the Atlantic mackerel, Scomber scombrus
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大西洋鲭鱼、鲭鱼成群的光强度阈值
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
W. R. Mojsiewicz
中科院分区：
文献类型：
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作者：
C. Glass;C. S. Wardle;W. R. Mojsiewicz
在12.6-1.8 × 10−10μEs−1 m−2范围内的不同光照强度下，研究了大西洋鲭鱼的集群行为。通过精确控制实验池上方3 m处绿色发光二极管（LED）的电流，产生可变的光强度。在高亮度（1.8 × 10−6μEs−1 m−2）下，鲭鱼总是形成一个群体，而在较低亮度（1.8 × 10−8μEs−1 m−2）下，它们作为个体游动。当光照强度降低到1.0 × 10−6μEs−1 m−2时，鱼群中的平均最近邻距离保持相对恒定（0.3-0.9个体长），并且鲭鱼个体沿着与最近邻鱼位置偏离小于14°的路径沿着游动。当光线低于1.8 × 10−7μEs−1 m−2时，最近邻距离和最近邻间的航向角都增加，在1.8 × 10−9μEs−1 m−2时，平均值分别为1-1.8体长和23-92°。结果进行了讨论，在海洋环境光条件。
The schooling behaviour of Atlantic mackerel was studied in a large tank at different light intensities in the range 12.6–1.8 × 10−10μEs−1 m−2. Variable light intensity was produced by accurately controlling the current to a green light-emitting diode (LED) 3 m above the experimental tank. Under high light levels (1.8 × 10−6μEs−1 m−2) mackerel always formed a single school, whereas at lower levels (1.8 × 10−8μEs−1 m−2) they swam as individuals. At light levels down to 1.0 × 10−6μEs−1 m−2 the mean nearest neighbour distance in a school remained relatively constant (0.3–0.9 body lengths), and individual mackerel swam along a path which deviated from the position of their nearest neighbours by less than 14°. As light dropped below 1.8 × 10−7μEs−1 m−2, both nearest neighbour distance and heading angle between nearest neighbours increased, with mean values of 1–1.8 body lengths and 23–92°, respectively, at 1.8 × 10−9μEs−1 m−2. The results are discussed in terms of ambient light conditions in the sea.