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Seasonal variation in male alternative reproductive tactics
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. Department of Ecology and Genetics, Evolutionary Biology Center, Uppsala University, Uppsala, Sweden.
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. Department of Evolutionary Ecology, Max Planck Institute for Evolutionary Biology, Plön, Germany.
2016 (English)In: Journal of Evolutionary Biology, ISSN 1010-061X, E-ISSN 1420-9101, Vol. 29, no 12, 2362-2372 p.Article in journal (Refereed) Published
Abstract [en]

Genetic parentage analyses reveal considerable diversity in alternative reproductive behaviours (e.g. sneaking) in many taxa. However, little is known about whether these behaviours vary seasonally and between populations. Here, we investigate seasonal variation in male reproductive behaviours in a population of two-spotted gobies (Gobiusculus flavescens) in Norway. Male two-spotted gobies guard nests, attract females and care for fertilized eggs. We collected clutches and nest-guarding males early and late in the breeding season in artificial nests and used microsatellite markers to reconstruct parentage from a subset of offspring from each nest. We hypothesized that mating, reproductive success and sneaking should be more prevalent early in the breeding season when competition for mates among males is predicted to be higher. However, parentage analyses revealed similar values of mating, reproductive success and high frequencies of successful sneaking early (30% of nests) and late (27% of nests) in the season. We also found that multiple females with eggs in the same nest were fertilized by one or more sneaker males, indicating that some males in this population engage in a satellite strategy. We contrast our results to previous work that demonstrates low levels of cuckoldry in a population in Sweden. Our results demonstrate marked stability in both the genetic mating system and male alternative reproductive tactics over the breeding season. However, sneaking rates may vary geographically within a species, likely due to local selection influencing ecological factors encountered at different locations.

Place, publisher, year, edition, pages
Wiley-Blackwell, 2016. Vol. 29, no 12, 2362-2372 p.
Keyword [en]
Gobiusculus flavescens, mating system, microsatellite DNA, parentage, satellite males, sexual selection, sneaking, two-spotted goby
National Category
Evolutionary Biology Genetics Environmental Sciences
Identifiers
URN: urn:nbn:se:umu:diva-129721DOI: 10.1111/jeb.12981ISI: 000389844700002OAI: oai:DiVA.org:umu-129721DiVA: diva2:1063561
Available from: 2017-01-10 Created: 2017-01-09 Last updated: 2017-01-10Bibliographically approved

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Monroe, Melanie J.Mobley, Kenyon B.
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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
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Language
  • de-DE
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Output format
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