Growth differences between naturally recruited and stocked European eel Anguilla anguilla from different habitats in Lithuania
Growth differences between naturally recruited and stocked European eel Anguilla anguilla from different habitats in Lithuania
复制标题
来自立陶宛不同栖息地的欧洲鳗鱼安圭拉鳗鱼自然招募和放养之间的生长差异
DOI：
10.1111/j.1095-8649.2007.01642.x
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发表时间：
2007
影响因子：
2
通讯作者：
W. Tzeng
中科院分区：
文献类型：
--
作者：
Y.;L. Ložys;J. Shiao;Y. Iizuka;W. Tzeng
欧洲鳗鳗从淡水湖泊在立陶宛有较慢的增长速度和较低的反算总长度（LT）比泻湖和沿海沃茨，但没有显着差异，发现不同的洄游历史的鱼类之间或自然招募和放养的鱼，除了较高的LT在年龄的放养欧洲鳗鱼在5至8年。渐近LT没有不同的栖息地或迁徙历史，但放养鳗鱼在湖泊中有较小的K（系数从冯Bertalanffy增长函数）比自然招募和放养鳗鱼在泻湖和沿海沃茨。欧洲鳗鱼在立陶宛的增长率可能主要受不同的栖息地，而不是不同的迁徙历史和放养。与放养鱼类相比，5-8岁自然招募鱼类的LT较低，可能是由于从大西洋和波罗的海迁移所需的额外能量成本。
European eels Anguilla anguilla from freshwater lakes in Lithuania had slower growth rates and lower backcalculated total lengths (LT) 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 LT at age of stocked European eels at ages 5 to 8 years. The asymptotic LT 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 LT 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.