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Genetic mating patterns studied in pools with manipulated nest site availability in two populations of Pomatoschistus minutus

Artikel i vetenskaplig tidskrift
Författare A. Singer
Charlotta Kvarnemo
K. Lindström
Ola Svensson
Publicerad i Journal of Evolutionary Biology
Volym 19
Nummer/häfte 5
Sidor 1641-1650
ISSN 1010-061X
Publiceringsår 2006
Publicerad vid Zoologiska institutionen, ekologisk zoologi
Sidor 1641-1650
Språk en
Länkar dx.doi.org/10.1111/j.1420-9101.2006...
Ämnesord alternative mating tactics, baltic sea, extra pair paternity, nest availability, piracy, sand goby, sneaking, sperm competition, strategies, extra-pair paternity, alternative reproductive tactics, sexual selection, sand goby, sperm competition, common goby, poecilia-reticulata, rhodeus-sericeus, predation risk, female mimicry
Ämneskategorier Marin ekologi, Etologi och beteendeekologi

Sammanfattning

Pomatoschistus minutus show paternal care in a resource defence mating system. We investigated the effect of nest-site availability on parasitic spawning. Each experimental pool contained four potentially nest-building males, four females and nests-sites in shortage (2) or excess (6). Both treatments were conducted in two populations; one with natural nest-sites in excess, one with a nest-site shortage. Microsatellite-DNA revealed that all nest-holders had fertilized most of the eggs they tended. Yet, 35% of the nests contained eggs fertilized by another male and 14.4% of the males had performed parasitic spawning. There was no site or treatment effect. Several females spawned in two nests, which coincided with parasitic spawnings, suggesting a cost to the nest-holder in terms of lost mating success. Nest-holders with and without eggs and non-nesting males all spawned parasitically, generating a significantly lower opportunity for sexual selection compared to if there had been no parasitic spawning.

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