Cucherousset J, Aymes J C, Poulet N, Santoul F, Céréghino R
EcoLab, Laboratoire d'écologie fonctionnelle, UMR 5245 (CNRS-UPS-INPT), Université Paul Sabatier, bât 4R3, 118, route de Narbonne, 31062 Toulouse Cedex 9, France.
Naturwissenschaften. 2008 Jul;95(7):647-54. doi: 10.1007/s00114-008-0370-3. Epub 2008 Mar 13.
Reproductive interactions between native and non-native species of fish have received little attention compared to other types of interactions such as predation or competition for food and habitat. We studied the reproductive interactions between non-native brook trout (Salvelinus fontinalis) and native brown trout (Salmo trutta) in a Pyrenees Mountain stream (SW France). We found evidence of significant interspecific interactions owing to consistent spatial and temporal overlap in redd localizations and spawning periods. We observed mixed spawning groups composed of the two species, interspecific subordinate males, and presence of natural hybrids (tiger trout). These reproductive interactions could be detrimental to the reproduction success of both species. Our study shows that non-native species might have detrimental effects on native species via subtle hybridization behavior.
与其他类型的相互作用（如捕食或对食物和栖息地的竞争）相比，本地和非本地鱼类物种之间的生殖相互作用很少受到关注。我们研究了法国西南部比利牛斯山脉一条溪流中，非本地溪红点鲑（Salvelinus fontinalis）和本地褐鳟（Salmo trutta）之间的生殖相互作用。我们发现，由于在产卵地定位和产卵期存在一致的时空重叠，有显著种间相互作用的证据。我们观察到由这两个物种组成的混合产卵群体、种间从属雄性以及天然杂交种（虎鳟）的存在。这些生殖相互作用可能对两个物种的繁殖成功都不利。我们的研究表明，非本地物种可能通过微妙的杂交行为对本地物种产生有害影响。
