Lidgard D C, Boness D J, Bowen W D, McMillan J I, Fleischer R C
Laboratoire de Biologie et Environnement Marins, Université de La Rochelle, La Rochelle F-17000, France.
Mol Ecol. 2004 Nov;13(11):3543-8. doi: 10.1111/j.1365-294X.2004.02334.x.
Studies using molecular markers have shown that some grey seal males may be gaining success through exhibiting alternative mating tactics. We estimated the probability of fertilization success of grey seal males exhibiting the primary tactic of female defence and one alternative tactic of mating with departing females on Sable Island, Nova Scotia, Canada, during the breeding seasons of 1997-2002. Although the fertilization rate of the primary tactic (27-43%) was greater than that of the alternative tactic (10-12%), these low rates indicate the potential fitness value of alternative mating tactics in this size-dimorphic pinniped species.
使用分子标记的研究表明，一些灰海豹雄性可能通过展现替代交配策略而获得成功。我们估计了在1997年至2002年繁殖季节期间，加拿大新斯科舍省塞布尔岛上，采用雌性防御主要策略以及与离开的雌性交配这一替代策略的灰海豹雄性的受精成功率。尽管主要策略的受精率（27%-43%）高于替代策略（10%-12%），但这些低受精率表明了这种体型二态性鳍足类物种中替代交配策略的潜在适应性价值。
