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首页> 外文期刊>Journal of Ichthyology >Rheoreaction as a Mechanism of Formation of Phenotypic Groups of Underyearlings of the Atlantic Salmon Salmo salar
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Rheoreaction as a Mechanism of Formation of Phenotypic Groups of Underyearlings of the Atlantic Salmon Salmo salar

机译：流变反应作为大西洋鲑Salmo salar一岁以下表型表型形成的机制

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摘要

Experimental investigation on rheoreaction as a behavioral mechanism in the formation of phe-notypic groups of underyearlings of the Atlantic salmon Salmo salar is performed. Juveniles of the Atlantic salmon are investigated at the age 0+ from the coastal group and from the tributary group in the period of its primary distribution from redds. The underyearlings from the tributary group differ from the coastal fish in increased critical current velocity, the fact that among them the most portion of individuals have a positive type of rheoreacrtion, and the fact that they prefer currents more often. The behavioral mechanism of spatial separation of the spreading juveniles at confluence of two currents is revealed: stronger individuals with the positive type of rheoreaction and the expressed rheopreferendum mainly move against the flow at a higher speed and manage to get into a tributary. The weaker fish with static and negative dynamic types of rheoreaction, having no expressed rheopreferendum, prefer the flow with lower current rate and turn out to be in the coastal zone of the mainstream.
机译：进行了以流变反应作为行为机制形成大西洋鲑鱼鲑的一岁成鸽的非典型型的实验研究。大西洋鲑的幼鱼在其初次分布发红期间，从沿海组和支流组在0岁以上进行了调查。支流种群的一岁以下种群与沿海鱼类的临界电流速度有所不同，其中大多数个体中的个体具有正性的流纹形成，而他们更偏爱洋流这一事实。揭示了在两个水流汇合处传播的幼体空间分离的行为机制：具有正型流变作用的强壮个体和表现出的流生全民投票主要以较高的速度逆流而行，并设法进入支流。具有静态和负动态类型的流变作用的较弱的鱼，没有表达过的流变体，更喜欢流率较低的流，结果在主流的沿海地区。

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