非本地褐鳟（Salmo trutta）和虹鳟（Oncorhynchus mykiss）溪流栖息种群中的同类相食现象。

Cannibalism in non-native brown trout Salmo trutta and rainbow trout Oncorhynchus mykiss stream-dwelling populations.

作者信息

Musseau C, Vincenzi S, Jesenšek D, Crivelli A J

机构信息

Department of Biology, Chemistry, Pharmacy, Institute of Biology, Freie Universität Berlin, Königin-Luise-Strasse 1-3, 14195 Berlin, Germany.

Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Altensteinstrasse 34, 14195 Berlin, Germany.

出版信息

J Fish Biol. 2017 Dec;91(6):1737-1744. doi: 10.1111/jfb.13477. Epub 2017 Oct 12.

DOI:10.1111/jfb.13477

PMID:29023766

Abstract

Introduced and allopatric populations of brown trout Salmo trutta and rainbow trout Oncorhynchus mykiss were sampled in Slovenia for stable isotope analysis to assess dietary niche shifts through ontogeny and estimate the propensity for cannibalism. Both S. trutta and O. mykiss are cannibals, with higher average relative contribution of conspecific assimilated energy for S. trutta (27·9%) compared with O. mykiss (7·7%). The smallest cannibal was 166 mm in the S. trutta population and 247 mm in the O. mykiss population.

摘要

在斯洛文尼亚对褐鳟（Salmo trutta）和虹鳟（Oncorhynchus mykiss）的引入种群和异域种群进行了采样，以进行稳定同位素分析，从而评估其在个体发育过程中的食性生态位变化，并估计同类相食的倾向。褐鳟和虹鳟都会同类相食，与虹鳟（7.7%）相比，褐鳟同类相食同化能量的平均相对贡献更高（27.9%）。褐鳟种群中最小的同类相食个体为166毫米，虹鳟种群中为247毫米。