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Banger, N., Blouin-Demers, G., Bulté, G., & Lougheed, S. (2013). More sires may enhance offspring fitness in northern map turtles, graptemys geographica. Canadian Journal of Zoology, 91, 581–588. 
Added by: Admin (06 Jan 2014 18:24:01 UTC)
Resource type: Journal Article
DOI: 10.1139/cjz-2012-0320
BibTeX citation key: Banger2013
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Categories: General
Keywords: Emydidae, Fortpflanzung - reproduction, Graptemys geographica, Habitat - habitat, Nordamerika - North America, Schildkröten - turtles + tortoises, Zeitigung - incubation
Creators: Banger, Blouin-Demers, Bulté, Lougheed
Collection: Canadian Journal of Zoology
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Sexual selection theory predicts that males should be promiscuous to maximize their reproductive success, while females should be choosy. Yet females of many taxa often produce progeny sired by multiple males indicating that promiscuity can be important for the reproductive success of females. Promiscuity may enhance the fitness of females if it increases the genetic quality, or the genetic variety, and thus the viability of their offspring. We quantified the number of sires per clutch in a population of northern map turtles, Graptemys geographica (LeSueur, 1817) in Lake Opinicon, Ontario, Canada and tested whether the number of sires affects several metrics of viability in hatchlings. Based on the most conservative estimate, at least 71% of clutches in this population are sired by multiple males, but there was no evidence that larger clutches are sired by more males. Clutches sired by more males had higher hatching success and survival, but the differences were not statistically significant. We did not find any effect of the number of sires on hatchling morphology or locomotor performance. Collectively our results partially support the hypothesis that promiscuity can increase the reproductive success of female map turtles.
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