作者: Joel C. Trexler , Robert C. Tempe , Joseph Travis
DOI: 10.2307/3546145
关键词: Poeciliidae 、 Predation 、 Size selective 、 Sex ratio 、 Heron 、 Egret 、 Body size 、 Plant cover 、 Ecology 、 Biology
摘要: Two species of herons (Aves: Ardeidae), the great egret and the snowy egret, fed preferentially on relatively large individual sailfin mollies (Pisces: Poeciliidae). The level of selectivity …