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首页> 外文期刊>Journal of Ichthyology >Reproductive Strategies and the Origin of Parapatric and Sympatric Forms of Arctic Charr Salvelinus alpinus (Salmonidae) in the System of Lakes Bol'shoe Leprindo and Maloe Leprindo (Northern Transbaikalia)
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Reproductive Strategies and the Origin of Parapatric and Sympatric Forms of Arctic Charr Salvelinus alpinus (Salmonidae) in the System of Lakes Bol'shoe Leprindo and Maloe Leprindo (Northern Transbaikalia)

机译：在湖泊Bol'shoe Leprindo和Maloe Leprindo（Nortbaikaliachals）的生殖策略和北极Charr Salvelinus Alpinus（Salmidae）的北极夏季萨尔芬松alpinus（Salmidae）的生育策略和症状

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摘要

In the system of lakes Bol'shoe Leprindo and Maloe Leprindo (Lena basin, Transbaikalia), spawning of two isolated populations of the dwarf form of Arctic charr Salvelinus alpinus was studied. The results supplemented with the data about the exterminated large form from these lakes, demonstrate a unique combination of sympatric and parapatric charr forms with autumn (large form), summer (dwarf form, Bol'shoe Leprindo) and first recorded in Russia winter-spring (dwarf form, Maloe Leprindo) spawning peaks. In both lakes, the dwarf form spawns in the profundal zone at silty bottom at the depth 25-58 m: in Bol'shoe Leprindo, from late June to October with peak in July-August when water temperature is 5-6 degrees C, in Maloe Leprindo from January to July, with peak in January-March when temperature is 2.5-3.0 degrees C. Eggs laid in July-August in Bol'shoe Leprindo develop for 3.0-3.5 months, eggs laid in January-March in Maloe Leprindo, for about 4.0-4.5 month; in both lakes they are actively consumed by burbot Lota lota. Due to smaller egg size the dwarf form has twice as high individual relative fecundity as the large form, which compensates for high egg mortality. It is supposed that the differences in spawning strategies were formed as the result of outcompeting of the dwarf form by the large form from the littoral to the profundal zone, where perennial low temperature favoured the prolongation and displacement of their spawning time. These differences determined reproductive isolation and genetic divergence between three charr populations.
机译：在湖泊Bol'Shoe Leprindo和Maloe Leprindo（Lena Basin，Transbaikaliach）的系统中，研究了两种分离的北极夏尔斯葡萄球菌族醛葡萄酒族山楂树的分离群体的产卵。关于从这些湖泊的灭绝大型形式的数据补充的结果展示了秋季（大型），夏季（矮格式，Bol'shoe Leprindo）的SympaTric和Parapatric Charr形式的独特组合，并在俄罗斯冬季唱片首次记录（矮格式，马罗·勒普德多）产卵山峰。在两个湖泊中，Dwarf在深度底部的大部分区域产生了25-58米：在Bol'shoe Leprindo，从6月下旬到10月份，7月至8月的水温为5-6摄氏度，在7月至7月的马罗·雷普林多，在1月至3月的峰值时，当温度为2.5-3.0摄氏度，鸡蛋于8月份在Bol'shoe Leprindo奠定了3.0-3.5个月，鸡蛋在Maloe Leprindo的1月 - 3月铺设了鸡蛋，约4.0-4.5个月;在两个湖泊中，他们都被Burbot Lota Lota积极消耗。由于较小的蛋尺寸，矮种形式具有两倍的高个体相对繁殖力，作为大形式，这补偿了高蛋死亡率。假设产卵策略的差异是由矮化形式的偏心形式的偏差从沿海地区的大型形式形成的结果，多年生低温赞成其产卵时间的延长和移位。这些差异确定了三个Charr种群之间的生殖分离和遗传分歧。

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