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Coalitions of relatives and reproductive skew in cooperatively breeding white-winged choughs

Heinsohn, Robert; Dunn, P; Legge, Sarah; Double, Michael

Description

We used DNA fingerprinting to examine reproductive skew in cooperatively breeding white-winged choughs, Corcorax melanorhamphos, which live in groups of up to 20 individuals. Before a severe drought, groups that had been stable for multiple years were characterized by long-term monogamy involving a single breeding pair thigh skew). After the drought, new groups formed from the amalgamation of multiple individuals and coalitions of relatives. At most one member of each faction succeeded in...[Show more]

dc.contributor.authorHeinsohn, Robert
dc.contributor.authorDunn, P
dc.contributor.authorLegge, Sarah
dc.contributor.authorDouble, Michael
dc.date.accessioned2015-12-13T23:15:36Z
dc.identifier.issn0962-8452
dc.identifier.urihttp://hdl.handle.net/1885/88963
dc.description.abstractWe used DNA fingerprinting to examine reproductive skew in cooperatively breeding white-winged choughs, Corcorax melanorhamphos, which live in groups of up to 20 individuals. Before a severe drought, groups that had been stable for multiple years were characterized by long-term monogamy involving a single breeding pair thigh skew). After the drought, new groups formed from the amalgamation of multiple individuals and coalitions of relatives. At most one member of each faction succeeded in breeding, such that skew was dependent on the number of unrelated factions, and not group size. In the new groups, dominant males and females with supporting relatives were always successful. Whereas most females without support also gained breeding positions, many males without family support failed to breed. Thus subordinates gain indirect fitness by first helping related males to secure a breeding position, and then helping to raise their young. Our study demonstrates the advantage of operating in coalitions, and suggests that the acquisition of future allies may be a major benefit of helping behaviour in this species.
dc.publisherRoyal Society of London
dc.sourceProceedings of the Royal Society of London Series B: Biological Sciences
dc.subjectKeywords: passerine; reproductive behavior; skewness; article; bird; breeding; cooperation; DNA fingerprinting; environmental factor; nonhuman; priority journal; reproduction; Animals; Breeding; DNA Fingerprinting; Female; Male; Natural Disasters; Reproduction; Sex Coalitions; Cooperative breeding; DNA fingerprinting; Reproductive skew
dc.titleCoalitions of relatives and reproductive skew in cooperatively breeding white-winged choughs
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume267
dc.date.issued2000
local.identifier.absfor060201 - Behavioural Ecology
local.identifier.ariespublicationMigratedxPub18832
local.type.statusPublished Version
local.contributor.affiliationHeinsohn, Robert, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationDunn, P, University of Wisconsin
local.contributor.affiliationLegge, Sarah, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationDouble, Michael, College of Medicine, Biology and Environment, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.startpage243
local.bibliographicCitation.lastpage249
dc.date.updated2015-12-12T08:44:11Z
local.identifier.scopusID2-s2.0-0034615064
CollectionsANU Research Publications

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