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首页> 外文期刊>Journal of Ichthyology >Distribution, Population Structure, and Some Biological Distinctio of Pikeperch Sander lucioperca of the Channel Part of the Akhtub River (Volga-Akhtuba Water System)
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Distribution, Population Structure, and Some Biological Distinctio of Pikeperch Sander lucioperca of the Channel Part of the Akhtub River (Volga-Akhtuba Water System)

机译：阿赫图布河（伏尔加-阿赫图巴水系）河道部分的鲈鱼的分布，种群结构和某些生物学特性

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摘要

Biological traits (distribution, reproduction, age composition, body length and weight) of pike-perch Sander lucioperca from channel parts of the Akhtuba River, remote from the Volga Delta, are investigated. In the investigated stretch of the river, movements of most specimens of pikeperch are local and occur in the deep part (4—10 m) of the channel. Aggregations of fish are not confined to any definite points but move along the extensive stretch of broads. Pikeperch prefer near-bottom biotopes confined to the zone of stable hydrodynamic eddies in places of complicated bottom relief—transverse crests and longitudinal channel crests. For the first time, it is found that pikeperch in the under-ice period move to the shallow zone of submersed inshoreshrubs. The age structure and body length and weight of pikeperch differ from those in the Volga Delta and correspond more to the populations from northern and northwestern parts of the species area. Pikeperch spawn only in temporary water bodies of theaccessory system, within a short period at the temperature 11 —17°C. The data on biology of pikeperch from the Akhtuba channel indicate the populational level of differences from the Volga Delta pikeperch.
机译：研究了远离伏尔加河三角洲的阿赫图巴河河道部分的鲈鱼Sander lucioperca的生物学特性（分布，繁殖，年龄组成，体长和体重）。在所调查的河段中，大多数梭子鱼的标本运动都是局部的，并发生在河道的深处（4-10 m）。鱼的聚集不限于任何确定的点，而是沿着广阔的广阔地带移动。梭鲈喜欢在复杂的底部浮雕的地方（横向波峰和纵向河道波峰）将近底部的生物群落限制在稳定的流体动力涡流区域。首次发现，冰期下的鲈鱼移到了近岸灌木的浅水区。鲈鱼的年龄结构，体长和体重与伏尔加河三角洲的不同，并且更对应于物种区域北部和西北部的种群。梭鲈仅在短时间内在11-17°C的温度下在附件系统的临时水体中产卵。来自阿赫图巴河道的鲈鱼生物学数据表明了与伏尔加河三角洲鲈鱼的种群差异水平。

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