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dc.contributor.author Germain, Ryan
dc.contributor.author Arcese, Peter
dc.contributor.author Reid, Jane
dc.date.accessioned 2017-11-14T16:21:12Z
dc.date.available 2017-11-14T16:21:12Z
dc.date.issued 2017-11-14
dc.identifier doi:10.5061/dryad.78568
dc.identifier.uri http://hdl.handle.net/10255/dryad.163391
dc.description The evolutionary benefits of simultaneous polyandry (female multiple mating within a single reproductive event) remain elusive. One potential benefit could arise if polyandry alters sibship structures and consequent relationships and relatedness among females' descendants, and thereby intrinsically reduces future inbreeding risk (the 'indirect inbreeding avoidance hypothesis'). However such effects have not been quantified in naturally complex mating systems that also encompass iteroparity, overlapping generations, sequential polyandry, and polygyny. We used long-term social and genetic pedigree data from song sparrows (Melospiza melodia) to quantify cross-generational consequences of simultaneous polyandry for offspring sibship structures and distributions of relationships and relatedness among possible mates. Simultaneous polyandry decreased full-sibships and increased half-sibships on average, but such effects varied among females and were smaller than would occur in the absence of sequential polyandry or polygyny. Further, while simultaneous polyandry decreased the overall frequencies of possible matings among adult full-sibs, it increased the frequencies of possible matings among adult half-sibs and more distant relatives. These results imply that the intrinsic consequences of simultaneous polyandry for inbreeding risk could cause weak indirect selection on polyandry, but the magnitude and direction of such effects will depend on complex interactions with other mating system components and the form of inbreeding depression.
dc.relation.haspart doi:10.5061/dryad.78568/1
dc.relation.haspart doi:10.5061/dryad.78568/2
dc.relation.haspart doi:10.5061/dryad.78568/3
dc.relation.haspart doi:10.5061/dryad.78568/4
dc.relation.haspart doi:10.5061/dryad.78568/5
dc.subject Fitness
dc.subject Genetics: evolutionary
dc.subject Genetics: population
dc.subject Life history: evolution
dc.subject Mate choice
dc.title Data from: The consequences of polyandry for sibship structures, distributions of relationships and relatedness, and potential for inbreeding in a wild population
dc.type Article
dwc.ScientificName Melospiza melodia
dc.contributor.correspondingAuthor Germain, Ryan
prism.publicationName The American Naturalist

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Title Sibship_Structures_Females_BANDED_offspring
Downloaded 3 times
Description This file includes the sibship structures among all females' banded offspring, given the social pedigree, genetic pedigree, and 'distinct males assumption'.
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Title Sibship_Structures_Females_RECRUITED_offspring
Downloaded 1 time
Description This file includes the sibship structures among all females' recruited offspring, given the social pedigree, genetic pedigree, and 'distinct males assumption'.
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Title Sibship_Structures_Males_BANDED_offspring
Downloaded 1 time
Description This file includes the sibship structures among all males' banded offspring, given the social and genetic pedigrees.
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Title Sibship_Structures_Males_RECRUITED_offspring
Downloaded 1 time
Description This file includes the sibship structures among all males' recruited offspring, given the social and genetic pedigrees.
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Title Relationships_and_Relatedness_All_Possible_Female_Male_Pairs
Downloaded 1 time
Description This file contains all possible female-male pairings from 2008-2015, as well as the relationship and relatedness among each pair, as calculated from both a social (ie no polyandry) and genetic (ie including polyandry) pedigree.
Download Relationships_and_Relatedness_All_Possibl...rs.txt (621.7 Kb)
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