Abstract

New data on the correlation between morphology and trophic specialization of three riverine charr forms from the Kamchatka River basin (stone charr, white charr, and Dolly Varden) are presented. The paper analyzes the food preferences of the fishes according to their stomach contents and retrospectively assesses their nutrition according to the ratio of stable nitrogen isotopes. The three charr forms are compared in terms of the head shape and structure of the cartilaginous skull for the first time. The correlation between the type of their nutrition and structural features of their skull is shown. Both general and specific adaptive features of the morphology of piscivorous stone and white charrs are revealed in comparison with benthivorous Dolly Varden.

中文翻译：

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堪察加河流域三种形式的Salvelinus malma（Salmonidae）的营养形态专一性相关的头骨形态变化。

摘要

提出了有关堪察加河流域三种河流Charr形态（石头charr，white charr和Dolly Varden）的形态与营养特化之间相关性的新数据。本文根据鱼类的胃中含量分析其鱼类的食物偏爱，并根据稳定氮同位素的比例回顾性评估其营养。首次比较三种charr形式的头部形状和软骨头骨的结构。显示了他们的营养类型与头骨结构特征之间的相关性。与弯曲食性的多莉·瓦尔登（Dolly Varden）相比，揭示了食肉性石头和白炭黑形态的一般和特定适应性特征。