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首页> 外文期刊>Journal of Fish Biology >Growth differences between naturally recruited and stocked European eel Anguilla anguilla from different habitats in Lithuania.
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Growth differences between naturally recruited and stocked European eel Anguilla anguilla from different habitats in Lithuania.

机译：来自立陶宛不同栖息地的自然招募和饲养的欧洲鳗An的生长差异。

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摘要

European eels Anguilla anguilla from freshwater lakes in Lithuania had slower growth rates and lower backcalculated total lengths (L< sub>T) than those from lagoons and coastal waters, but no significant differences were found among fish with different migratory histories or between naturally recruited and stocked fish except a higher L< sub>T at age of stocked European eels at ages 5 to 8 years. The asymptotic L< sub>T (L< sub>T infinity ) did not differ among habitats or migratory histories, but the stocked eels in the lakes had smaller K (coefficient from the von Bertalanffy growth function) than did the both naturally recruited and stocked eels in the lagoon and coastal waters. The growth rate of European eels in Lithuania might be influenced mainly by different habitats rather than different migratory histories and stocking. The lower L< sub>T at age of naturally recruited fish at ages 5-8 years compared to stocked fish might result from the extra energy costs entailed in migration from the Atlantic and across the Baltic Sea.
机译：与泻湖和沿海水域相比，立陶宛淡水湖泊中的欧洲鳗An生长速度较慢，反算总长度（L T ）较低，但是在不同迁徙史或不同迁徙历史的鱼类之间未发现显着差异。在自然捕捞和放养的鱼之间，除了在5至8岁的欧洲鳗鱼放养时的L T 较高。渐近的L T （L T无穷大）在生境或迁徙历史之间没有差异，但是湖泊中的鳗鱼的K较小（来自von Bertalanffy生长函数的系数） ），而不是泻湖和沿海水域中自然招募和饲养的鳗鱼。立陶宛欧洲鳗鱼的增长率可能主要受不同栖息地的影响，而不是受不同迁徙历史和种群的影响。与放养的鱼相比，5-8岁的自然捕捞鱼的L T 年龄较低，这可能是由于从大西洋和波罗的海迁移造成的额外能源成本所致。

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