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Mobility affects copulation and oviposition dynamics in Pieris brassicae in seminatural cages

Insect Science 2019年第4期26卷 743-752页

作者： Nicolas Larranaga Michel Baguette Olivier Calvez delphine legrand Centre National de la Recherche Scientifique and Universite Paul Sabatier Toulouse III SETE Station d'Ecologie Theorique et Experimentale UMR 5321 Moulis France Museum National d'Histoire Naturelle (Sorbonne Universites) Institut de Systematique Evolution et Biodiversite UMR 7205 57 rue Cuvier 75005 Paris cedex 5 France

When, how often and for how long organisms mate can have strong consequences for individual fitness and are crucial aspects of evolutionary ecology. Such determinants are likely to be of even greater importance in monandrous species and species with short adult life stages. Previous work suggests that mobility, a key dispersal? related trait, may affect the dynamics of copulations, but few studies have investigated the impact of individual mobility on mating latency, copulation duration and oviposition latency simultaneously. In this paper, we monitored the copulation dynamics of 40 males and 40 females, as well as the oviposition dynamics of the females of the Large White butterfly Pieris brassicae, a facultative long-distance disperser butterfly. Individuals from a breeding were selected to create a uniform distribution of mobility and we recorded the timing, number and duration of all copulations in a semiexperimental system. We showed that mobility, measured as the time spent in flight under stressful conditions (a proxy of dispersal tendency), correlates with all aspects of copulation dynamics: mobile males and females mated earlier and for shorter periods than less mobile individuals. In turn, late mating females increased the time between copulation and oviposition. These results feed the previously described mobility syndrome of R brassicae, involving morphological and physiological characters, with life-history traits. We suggest that the reduction of mating latency and copulation duration has an adaptive value in dispersing individuals, as their life expectancy might be shorter than that of sedentary individuals.

关键词： copulation duration life history mating latency mobility syndrome oviposition latency Pieris brassicae

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