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首页> 外文期刊>Journal of Ichthyology >Three Sympatric forms of Arctic Charr Salvelinus alpinus Complex (Salmoniformes, Salmonidae) from Lake Kamkanda, Northern Transbaikalia1
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Three Sympatric forms of Arctic Charr Salvelinus alpinus Complex (Salmoniformes, Salmonidae) from Lake Kamkanda, Northern Transbaikalia1

机译：来自北Transbaikalia北部坎坎达湖的三种北极Charr Salvelinus alpinus复合体的同养动物形式（Salmoniformes，Salmonidae）1

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摘要

—We studied morphology, size and age structure, growth, feeding, and variation at microsatellite loci of three forms of Arctic charr Salvelinus alpinus complex (dwarf, small, large) from mountain Lake Kam-kanda in River Olekma basin, northern Transbaikalia. The forms differ in meristic and morphometric characters, external appearance and size. The small form distinctly differs from the dwarf and large forms in higher number and length of gill rakers. The forms differ in growth rate; however, differences in growth between the dwarf and the small forms are not as large as between sympatric dwarf and small charr from other Trans-baikalian lakes. The large form is heterogeneous in growth rate. The small form matures one year earlier than the dwarf formand has a shorter life span. The dwarf form is a benthophage, the small form is a planktophage, and the large form is a predator. The dwarf form spawns in September, while the small form spawns in November—December, and there is no overlap in their spawning time. The three forms have clear genetic differences, which support their reproductive isolation. It is assumed that the three forms of Arctic charr originated within Lake Kamkanda on the basis of trophic polymorphism and spawning time displacementand attained a high degree of morphological and genetic divergence.
机译：—我们研究了北贝加利亚省北部奥利克马河流域卡姆坎大湖上三种形式的北极红点鲑Salvelinus alpinus复合体（矮，小，大）的形态，大小和年龄结构，生长，摄食以及微卫星位点的变化。形式各不相同，分别是特征和形态特征，外观和大小。小形式与矮人明显不同，大型形式的of耙更小。形式的增长率不同;然而，侏儒和小形体之间的生长差异不如同伴矮人和其他跨白加力湖中的小沙尔之间的生长差异大。大型形式的增长率不同。小型形式比矮型形式成熟一年，寿命较短。侏儒形式是底栖动物，小形式是浮游生物，大形式是捕食者。矮形在9月产卵，小形在11月-12月产卵，产卵时间没有重叠。这三种形式具有明显的遗传差异，这支持它们的生殖隔离。假定这三种北极红点藻是在营养多态性和产卵时间位移的基础上起源于卡姆坎达湖的，并在形态和遗传上有很高的差异。

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