Population Structure, Ecological Segregation, and Reproduction in a Population of Arctic Char (Salvelinus alpinus) from Lake Tasersuaq, Greenland
Population Structure, Ecological Segregation, and Reproduction in a Population of Arctic Char (Salvelinus alpinus) from Lake Tasersuaq, Greenland
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格陵兰岛 Tasersuaq 湖北极红点鲑 (Salvelinus alpinus) 的种群结构、生态隔离和繁殖
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发表时间：
1986
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影响因子：
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通讯作者：
B. Christensen
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文献类型：
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作者：
F. Rigét;K. Nygaard;B. Christensen
西格陵兰岛 Tasersuaq 大湖中的北极红点鲑 (Salvelinus alpinus) 种群由三个不同大小的群体组成，代表着生境、摄食和繁殖方面存在差异的生态形态。较小的炭是底栖的，以摇蚊为食，而中型的炭在夏季生活在中上层，以浮游动物为食。较大的炭在地层上随机移动，同类相食的重要性随着尺寸的增大而增加。每个体型组内的年龄差异很大。所有三个群体都包含产卵者，但产卵频率因群体而异。较小的形态可能会转变为较大的形态，仅与饮食和体细胞生长周期的相关变化有关。我们假设塔瑟苏阿克种群的生态形态可能代表了物种形成的早期步骤。这种观点弥合了文献中提出的对炭种群的相反解释，认为不同的形式属于共同基因库或生殖...
The population of Arctic char (Salvelinus alpinus) in a large lake, Tasersuaq, in West Greenland consisted of three distinct size groups representing ecological forms with differences in habitat, feeding, and reproduction. Smaller char were benthic and fed on chironomids whereas medium-sized char were living pelagically in summer, feeding on zooplankton. Larger char moved randomly over the strata, and cannibalism increased in importance with increasing size. Within each size group there was a great variation in age. All three groups contained spawners but spawning frequency variated between groups. Smaller forms probably transform to larger ones with correlated shifts in diet and periods of somatic growth only. We hypothesize that the ecological forms of the Tasersuaq population may represent an early step towards speciation. This view bridges the opposing interpretations of char populations presented in the literature considering different forms as belonging to either a common gene pool or to reproductiv...