Impact of male condition on his spermatophore and consequences for female reproductive performance in the Glanville fritillary butterfly

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http://hdl.handle.net/10138/234808

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Duplouy , A , Woestmann , L , gallego-Zamorano , J & Saastamoinen , M A K 2018 , ' Impact of male condition on his spermatophore and consequences for female reproductive performance in the Glanville fritillary butterfly ' , Insect science , vol. 25 , no. 2 , pp. 284-296 . https://doi.org/10.1111/1744-7917.12424

Title: Impact of male condition on his spermatophore and consequences for female reproductive performance in the Glanville fritillary butterfly
Author: Duplouy, Anne; Woestmann, Luisa; gallego-Zamorano, juan; Saastamoinen, Marjo Anna Kaarina
Contributor: University of Helsinki, Research Centre for Ecological Change
University of Helsinki, Life-history Evolution Research Group
University of Helsinki, Biosciences
Date: 2018-04
Language: eng
Number of pages: 13
Belongs to series: Insect science
ISSN: 1672-9609
URI: http://hdl.handle.net/10138/234808
Abstract: In butterflies, male reproductive success is highly related to the quality and the size of the spermatophore transferred to the female. The spermatophore is a capsule produced by the male during copulation, which in many species contains sperm in addition to a nuptial gift, and which is digested by the female after copulation. The nuptial gift may contribute to egg production and offspring quality, and in some cases also to female body maintenance. The production of the spermatophore, however, represents a cost for the male and, in polyandrous species, ejaculates are sometimes allocated adaptively across matings. Nonetheless, although the ecological factors affecting the reproductive success of female butterflies have been the topic of numerous studies, little information exists on the factors affecting males’ contribution to reproduction, and the indirect impacts on female fecundity and fitness. We used the Glanville fritillary butterfly, Melitaea cinxia (Linnaeus, 1758) (Nymphalidae), in order to assess variation in male allocation to matings. In this species, smaller males produce smaller spermatophores, but variation in spermatophore size is not correlated with female reproductive success. We show that spermatophore size increases with male age at first mating, decreases with mating frequency and adult food-deprivation, and is not influenced by developmental food-limitation. The length of copulation period does not influence the spermatophore size nor influences the polyandrous mating behavior in this species. Male contribution to his spermatophore size is clearly influenced by his condition and adult-resource at the time of mating. Despite this variation, spermatophore size does not seem to have a direct impact on female reproductive output or mating behavior.
Subject: 1181 Ecology, evolutionary biology
ejaculate
fecundity
food-restriction
Melitaea cinxia
BICYCLUS-ANYNANA LEPIDOPTERA
PIERIS-RAPAE LEPIDOPTERA
LIFE-HISTORY
MATING HISTORY
SPERM ALLOCATION
SEXUAL CONFLICT
EJACULATE SIZE
NUPTIAL GIFTS
CLUTCH SIZE
NAPI L
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