Field observations and laboratory experiments on growth and lipid content of young‐of‐the‐year perch
Field observations and laboratory experiments on growth and lipid content of young‐of‐the‐year perch
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当年幼鲈鱼生长及脂质含量的现场观察和室内实验
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
P. Murawski
中科院分区：
文献类型：
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作者：
J. Borcherding;B. Hermasch;P. Murawski
– 研究了当年幼 (YOY) 鲈鱼 (Perca Fluviatilis) 的生长和能量分配差异与食物数量和质量的关系。以鱼类和糠虾为食，菲佛湖第一个生长季节结束后，鲈鱼的平均尺寸为 152 毫米。相比之下，Speldrop 湖中的鲈鱼同比增长至 107 毫米，Reeser Meer 湖中的同比增长至 83 毫米，主要以浮游动物为食。与食物吸收和生长相关，假设来自普法伊弗湖的 YOY 鲈鱼在第一个冬天的饥饿期应该比来自 Speldrop 湖和 Reeser 湖的鲈鱼更好地生存，那么 Pfeiffer 湖的 YOY 鲈鱼的脂质含量显着最高，而 Reeser Meer 湖的最低。在实验室以鱼为食时，平均最高生长率为 1.31 mm·day−1。当食物摄入量超过 66 J·g WW−1·day−1 时，体重开始增长，而脂质含量的增加则需要 175 J·g WW−1·day−1 的食物输入。与高利润食物的供应相关的增长潜力的增加被认为是可能对鱼类社区产生深远影响的一个重要因素。
– Differences in growth and allocation of energy of young-of-the-year (YOY) perch (Perca fluviatilis) were studied in relation to both quantity and quality of food. Feeding on fish and Mysidacea, the mean size of YOY perch after the first growing season in Lake Pfeiffer was 152 mm. In contrast, YOY perch grew to 107 mm in Lake Speldrop and 83 mm in Lake Reeser Meer while mainly feeding on zooplankton. In correlation with food uptake and growth, the lipid content of YOY perch was significantly highest in Lake Pfeiffer and lowest in Lake Reeser Meer, assuming that YOY perch from Lake Pfeiffer should be able to survive starvation periods during their first winter better then those from Lake Speldrop and Lake Reeser. While feeding on fish, mean highest growth rates were 1.31 mm·day−1 in the laboratory. Growth in weight started when food uptake exceeded 66 J·g WW−1·day−1, while an increase of lipid content required food input of 175 J·g WW−1·day−1. Increased growth potential associated with the availability of energetically profitable food is assumed as an important factor that could have far-reaching consequences for the fish community.