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首页> 外文期刊>BFPP:Bulletin Francais de la Peche et de la Pisciculture: Bulletin Francais de la Peche et de la Protection des Milieux Aquatiques >FOOD HABITS AND ONTOGENETIC CHANGES IN THE DIET OF WHITEFISH LARVAE IN LAKE ANNECY
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FOOD HABITS AND ONTOGENETIC CHANGES IN THE DIET OF WHITEFISH LARVAE IN LAKE ANNECY

机译：西湖白鹅幼虫饮食中的食物习性和遗传变化

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摘要

The ontogenetic changes in the diet of whitefish (Coregonus lavaretus) larvae were investigated during three consecutive years in a deep peri-alpine lake. Identification of the feeding habits of larvae in relation to their larval stage was performed using a PCA% in order to take into account the individual variability in larval diet. Although whitefish larvae are planktivorous, the present study points out ontogenetic changes in diet. While young larval stages are opportunistic feeders on small copepods, older stages feed preferentially on Daphnia sp.. Strong inter-annual variability has been observed in the dietary overlap between the successive larval stages. We show that the density and availability of the potential prey will affect the dynamicsof the ontogenetic changes in the diet. Furthermore, it could probably alter the intra-specific competition between larval stages.
机译：连续三年在一个深高山湖泊中调查了白鲑（Coregonus lavaretus）幼虫饮食的个体发育变化。为了确定幼虫饮食的个体差异，使用PCA％来确定幼虫相对于幼虫阶段的摄食习惯。尽管白鲑幼虫是浮游动物，但本研究指出了饮食中的遗传变化。幼虫阶段是小co足类的机会性饲养者，而幼虫阶段则优先以水蚤（Daphnia sp。）为食。在连续的幼虫阶段之间的饮食重叠中观察到强烈的年际变异性。我们表明潜在猎物的密度和可用性将影响饮食中个体发育变化的动力学。此外，它可能会改变幼虫阶段之间的种内竞争。

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