Moran R L, Soukup R M, Zhou M, Fuller R C
Program in Ecology, Evolution, and Conservation Biology, Department of Animal Biology, School of Integrative Biology, University of Illinois at Urbana-Champaign, Champaign, Illinois 61820, U.S.A.
J Fish Biol. 2018 Feb;92(2):532-536. doi: 10.1111/jfb.13523. Epub 2017 Dec 11.
Egg viability in the rainbow darter Etheostoma caeruleum, a fish apparently lacking female mate choice, was found to decline rapidly after ovulation. It was observed that the majority of a female's clutch may fail to hatch if she is prevented from mating for as little as 6 h. These data suggest that exercising female mate preferences may be selectively disfavoured in E. caeruleum due to the high cost of delaying mating.
在彩虹镖鲈（Etheostoma caeruleum）这种明显缺乏雌性配偶选择的鱼类中，发现卵子活力在排卵后迅速下降。据观察，如果雌性被阻止交配短短6小时，其大部分卵可能无法孵化。这些数据表明，由于延迟交配的成本高昂，在彩虹镖鲈中，行使雌性配偶偏好可能在选择上是不利的。
