Laloi David, Richard Murielle, Fédérici Pierre, Clobert Jean, Teillac-Deschamps Pauline, Massot Manuel
UPMC Univ Paris 06, UMR 7625, Laboratoire Ecologie & Evolution, F-75005 Paris, France.
Ecol Lett. 2009 Aug;12(8):823-9. doi: 10.1111/j.1461-0248.2009.01335.x. Epub 2009 Jun 12.
The relationship between mating systems and dispersal has generally been studied at the population and species levels. It has hardly ever been investigated at the individual level, by studying the variations of mating and dispersal strategies between individuals. We investigated this relationship in a natural population of the common lizard (Lacerta vivipara). Assuming that dispersal has a genetic basis, juvenile dispersal would be expected to be more family-dependent in monoandrous litters than in polyandrous litters. The opposite pattern was observed. Thus, maternal effects and/or litter effects play a greater role than genetic determinism in shaping the dispersal phenotype of juveniles. Moreover, the relationship between female mating strategy and offspring dispersal depended on litter success, in a way consistent with an influence of mother-offspring competition. Such a link between mating and dispersal strategies of individuals may have major repercussions for the way we consider the roles of these processes in population functioning.
交配系统与扩散之间的关系通常是在种群和物种层面进行研究的。几乎从未在个体层面进行过研究，即通过研究个体之间交配和扩散策略的差异来进行探究。我们在普通蜥蜴（胎生蜥蜴）的自然种群中研究了这种关系。假设扩散具有遗传基础，那么在单配偶产仔的情况下，幼体扩散预计会比多配偶产仔的情况更依赖家族。但观察到的情况却相反。因此，母体效应和/或窝效应在塑造幼体扩散表型方面比遗传决定论发挥着更大的作用。此外，雌性交配策略与后代扩散之间的关系取决于窝的成功情况，这与母-子竞争的影响相一致。个体的交配和扩散策略之间的这种联系可能会对我们思考这些过程在种群功能中的作用方式产生重大影响。
