Abstract The feeding habits of brown trout (age 2+ and 3+ years) in the small Orzega River (Lake Onega basin) are analyzed with an autumn decrease in the number of accessible food items. Along with the previously determined mechanisms for compensating for this phenomenon (feeding directly from the bottom and consumption of large items), a sharp increase in the variability of the individual feeding habits of sea trout in October is revealed both by the composition of the contents of its stomachs and by the amount of consumed feed. The food differentiation of individuals makes it possible to expand the food supply of the brown trout population in the river and effectively use the food resources of the small watercourse, which is particularly important during the period of low availability.

中文翻译：

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Salmo trutta L. 幼鱼的食物分化作为扩大人口食物供应的机制

摘要 分析了小奥尔泽加河（奥涅加湖盆地）褐鳟鱼（2 岁以上和 3 岁以上）的摄食习性，秋季可获得的食物数量减少。加上先前确定的补偿这种现象的机制（直接从底部进食和消耗大件物品），10 月份海鳟鱼个体摄食习性的变异性急剧增加它的胃和消耗的饲料量。个体的食物分化使得扩大河流中褐鳟鱼种群的食物供给成为可能，有效利用小河道的食物资源，这在低可用性时期尤为重要。