两种寄生桡足类之间不对称竞争的实验证据。
Experimental evidence of asymmetrical competition between two species of parasitic copepods.
作者信息
Dawson L H, Renaud F, Guégan J F, de Meeûs T
机构信息
Station Méditerranéenne de l'Environnement Littoral, Sète, France.
出版信息
Proc Biol Sci. 2000 Oct 7;267(1456):1973-8. doi: 10.1098/rspb.2000.1238.
Lepeophtheirus thompsoni and Lepeophtheirus europaensis are two parasitic copepods naturally isolated on their sympatric hosts, i.e. turbot (Psetta maxima L.) and brill (Scophthalmus rhombus L.), respectively They are able to meet, mate and hybridize on turbot experimentally but they are naturally prevented from doing so by a strong host preference when given a choice. Theory suggests that such a pattern is possible, but only under conditions of competition for the resource. In the present study the attachment rates of the two copepods were studied experimentally under various conditions of competition, infectious dose and number of available hosts. The results suggest a greater sensitivity to competition for the generalist species L. europaensis than for the specialist L. thompsoni, which is in agreement with theoretical predictions.
汤普森鱼虱和欧洲鱼虱是两种寄生性桡足类动物，分别自然寄生于它们的同域宿主，即大菱鲆（Psetta maxima L.）和布氏鲳鲹（Scophthalmus rhombus L.）。在实验条件下，它们能够在大菱鲆上相遇、交配并杂交，但当有选择时，由于强烈的宿主偏好，它们在自然情况下无法这样做。理论表明，这种模式是可能的，但只有在资源竞争的条件下才会出现。在本研究中，在各种竞争、感染剂量和可用宿主数量的条件下，对这两种桡足类动物的附着率进行了实验研究。结果表明，广食性物种欧洲鱼虱比专食性物种汤普森鱼虱对竞争更敏感，这与理论预测一致。
Zotero 插件