Genetic evidence for cooperative polyandry in reverse dichromatic Eclectus parrots

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dc.contributor.authorHeinsohn, Robert
dc.contributor.authorEbert, Daniel
dc.contributor.authorLegge, Sarah
dc.contributor.authorPeakall, Rodney
dc.date.accessioned2015-12-10T22:15:18Z
dc.date.issued2007
dc.date.updated2015-12-09T08:15:20Z
dc.description.abstractGroup size in cooperatively polyandrous birds appears to be limited by the diminishing probability that any one male will achieve paternity as group size increases. Here we use molecular techniques to analyse the mating system of Eclectus parrots, a species with a surprisingly large number of males (up to seven) in each group. We show that their social groups are not composed of kin, and that all males seek direct fitness. Most broods of two nestlings had just one father. However, further group males gained paternity in other nesting attempts within and between breeding seasons. Although the likelihood of multiple paternity increased with the number of males in the group, only a subset of group males gained paternity over the eight-year study period. Some males gained paternity at irregular intervals with the same female over multiple years, and many also mated polygynandrously at widely dispersed nests. Our data also confirm that females monopolise scarce breeding hollows over multiple years. We suggest that Eclectus parrots occur in larger group sizes than other cooperatively polyandrous species as a result of a severely biased operational sex ratio brought about by a scarcity of breeding females and a male-biased adult sex ratio.
dc.identifier.issn0003-3472
dc.identifier.urihttp://hdl.handle.net/1885/50591
dc.publisherAcademic Press
dc.sourceAnimal Behaviour
dc.subjectKeywords: bird; breeding season; cooperative behavior; fitness; genetic marker; group size; molecular analysis; paternity; polyandry; reproductive strategy; sex ratio; Aves; Eclectus; Psittacidae cooperative polyandry; Eclectus parrot; genetic mating system; group size; microsatellites; polygynandry
dc.titleGenetic evidence for cooperative polyandry in reverse dichromatic Eclectus parrots
dc.typeJournal article
local.bibliographicCitation.lastpage1054
local.bibliographicCitation.startpage1047
local.contributor.affiliationHeinsohn, Robert, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationEbert, Daniel, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationLegge, Sarah, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationPeakall, Rodney, College of Medicine, Biology and Environment, ANU
local.contributor.authoremailu8406391@anu.edu.au
local.contributor.authoruidHeinsohn, Robert, u8406391
local.contributor.authoruidEbert, Daniel, u9507474
local.contributor.authoruidLegge, Sarah, u9411529
local.contributor.authoruidPeakall, Rodney, u9306248
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor060411 - Population, Ecological and Evolutionary Genetics
local.identifier.absfor060201 - Behavioural Ecology
local.identifier.ariespublicationu9511635xPUB206
local.identifier.citationvolume74
local.identifier.doi10.1016/j.anbehav.2007.01.026
local.identifier.scopusID2-s2.0-35148896215
local.identifier.uidSubmittedByu9511635
local.type.statusPublished Version

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