Effects of age and repeated mating on male sperm supply and paternity in a parasitoid wasp
Autor: | Christophe Bressac, Claude Chevrier, Hong Do Thi Khanh |
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Přispěvatelé: | Institut de recherche sur la biologie de l'insecte UMR7261 (IRBI), Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS) |
Rok vydání: | 2009 |
Předmět: |
0106 biological sciences
endocrine system offspring paternity Zoology Hymenoptera 010603 evolutionary biology 01 natural sciences sperm competition [SDV.BDLR.RS]Life Sciences [q-bio]/Reproductive Biology/Sexual reproduction Parasitoid wasp multiple mating Human fertilization Seminal vesicle Botany medicine sperm raffle Pteromalidae Sperm competition reproductive and urinary physiology Ecology Evolution Behavior and Systematics biology urogenital system biology.organism_classification Sperm 010602 entomology medicine.anatomical_structure Anisopteromalus calandrae ageing Insect Science male reproduction |
Zdroj: | Entomologia Experimentalis et Applicata Entomologia Experimentalis et Applicata, Wiley, 2009, pp.207-213. ⟨10.1111/j.1570-7458.2008.00810.x⟩ |
ISSN: | 1570-7458 0013-8703 |
DOI: | 10.1111/j.1570-7458.2008.00810.x |
Popis: | International audience; Post-copulatory paternity biases after female multiple mating are major constraints on both male and female reproductive systems. The outcome of paternity in certain situations is only controlled directly by male sperm stock. This was tested experimentally in the parasitoid wasp Anisopteromalus calandrae (Howard) (Hymenoptera: Pteromalidae), in which sperm stocks are small (several hundred) and the fertilizing efficiency of stored sperm is high (the ratio of sperm stored/fertilized eggs is about 0.75). Sperm in seminal vesicles and paternity of males of different status (virgin young, virgin old, or young previously mated) were measured after female single and double mating. The amount of sperm in the seminal vesicle differed according to male status (increasing from previously mated males to old males), but there was no difference in sperm stored by females after a single mating. In double mating experiments with two males of different status, paternity increased linearly with the relative amount of sperm in seminal vesicles. Paternity distribution conforms to ‘a fair raffle' of sperm from both donors following complete mixing of sperm prior to fertilization. Thus, in a female multiple mating context, male fitness depends principally on their sperm stock, which in turn depends on life history parameters, such as age and previous mating. |
Databáze: | OpenAIRE |
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