Children of divorce: effects of adult replacements on previous offspring in Argentinean owl monkeys

Hdl Handle:
http://hdl.handle.net/10545/270392
Title:
Children of divorce: effects of adult replacements on previous offspring in Argentinean owl monkeys
Authors:
Huck, Maren ( 0000-0002-7740-3903 ) ; Fernández-Duque, Eduardo
Abstract:
According to the Evolutionary Theory of the Family, the replacement of one pair-member by an intruder may have profound consequences for the existing offspring. Step-parents are expected to provide less care towards unrelated immatures than to genetic offspring, unless caring also serves as a mating strategy. Furthermore, because an intruder will be a potential mate for opposite-sexed offspring, relationships between offspring and same-sex parents are predicted to deteriorate. To test these predictions, we studied an Azara’s owl monkey (Aotus azarai) population in Argentina exhibiting serial monogamy and biparental care. Since 1997, we have collected demographic data from ca. 25 groups and inter-individual distance data from ca. 150 marked individuals. First, we compared survival and dispersal age of immatures in groups with and without replacements to investigate whether parental care serves as a mating strategy. Second, we compared sexspecific age at dispersal for groups with replacement of opposite-sex parents, same-sex parents, or in stable groups in order to test whether relationships between offspring and same-sex parents deteriorated after the replacement of the other parent. Survival and dispersal ages were not negatively associated with replacements, suggesting that male care might serve, at least partly, as a mating strategy. The time lag between a replacement and the subsequent dispersal of female offspring was greater if the intruder was a male, while the offspring and same-sex parents were less often nearest neighbors after replacements than before. Our results suggest that family disruption through the replacement of a parent is not associated with decreased offspring survival or early dispersion of juveniles, but deteriorates parent–offspring relationships.
Affiliation:
University of Pennsylvania; Centro de Ecologia Aplicada del Litoral, CONICET
Citation:
Children of divorce: effects of adult replacements on previous offspring in Argentinean owl monkeys 2011, 66 (3):505 Behavioral Ecology and Sociobiology
Publisher:
Springer
Journal:
Behavioral Ecology and Sociobiology
Issue Date:
2012
URI:
http://hdl.handle.net/10545/270392
DOI:
10.1007/s00265-011-1297-9
Additional Links:
http://www.springerlink.com/index/10.1007/s00265-011-1297-9
Type:
Article
ISSN:
0340-5443; 1432-0762
Sponsors:
Deutsche Forschungsgemeinschaft (HU 1746/2-1); National Science Foundation (BCS-0621020)
Appears in Collections:
Biological Sciences Research Group

Full metadata record

DC FieldValue Language
dc.contributor.authorHuck, Marenen
dc.contributor.authorFernández-Duque, Eduardoen
dc.date.accessioned2013-02-25T16:38:27Z-
dc.date.available2013-02-25T16:38:27Z-
dc.date.issued2012-
dc.identifier.citationChildren of divorce: effects of adult replacements on previous offspring in Argentinean owl monkeys 2011, 66 (3):505 Behavioral Ecology and Sociobiologyen
dc.identifier.issn0340-5443-
dc.identifier.issn1432-0762-
dc.identifier.doi10.1007/s00265-011-1297-9-
dc.identifier.urihttp://hdl.handle.net/10545/270392-
dc.description.abstractAccording to the Evolutionary Theory of the Family, the replacement of one pair-member by an intruder may have profound consequences for the existing offspring. Step-parents are expected to provide less care towards unrelated immatures than to genetic offspring, unless caring also serves as a mating strategy. Furthermore, because an intruder will be a potential mate for opposite-sexed offspring, relationships between offspring and same-sex parents are predicted to deteriorate. To test these predictions, we studied an Azara’s owl monkey (Aotus azarai) population in Argentina exhibiting serial monogamy and biparental care. Since 1997, we have collected demographic data from ca. 25 groups and inter-individual distance data from ca. 150 marked individuals. First, we compared survival and dispersal age of immatures in groups with and without replacements to investigate whether parental care serves as a mating strategy. Second, we compared sexspecific age at dispersal for groups with replacement of opposite-sex parents, same-sex parents, or in stable groups in order to test whether relationships between offspring and same-sex parents deteriorated after the replacement of the other parent. Survival and dispersal ages were not negatively associated with replacements, suggesting that male care might serve, at least partly, as a mating strategy. The time lag between a replacement and the subsequent dispersal of female offspring was greater if the intruder was a male, while the offspring and same-sex parents were less often nearest neighbors after replacements than before. Our results suggest that family disruption through the replacement of a parent is not associated with decreased offspring survival or early dispersion of juveniles, but deteriorates parent–offspring relationships.en
dc.description.sponsorshipDeutsche Forschungsgemeinschaft (HU 1746/2-1); National Science Foundation (BCS-0621020)en
dc.publisherSpringeren
dc.relation.urlhttp://www.springerlink.com/index/10.1007/s00265-011-1297-9en
dc.rightsArchived with thanks to Behavioral Ecology and Sociobiologyen
dc.subjectAotus azaraeen
dc.subjectDispersalen
dc.subjectEvolutionary theory of the familyen
dc.subjectParent–offspring conflicten
dc.subjectNight monkeysen
dc.subjectSurvivalen
dc.titleChildren of divorce: effects of adult replacements on previous offspring in Argentinean owl monkeys-
dc.typeArticleen
dc.contributor.departmentUniversity of Pennsylvaniaen
dc.contributor.departmentCentro de Ecologia Aplicada del Litoral, CONICET-
dc.identifier.journalBehavioral Ecology and Sociobiologyen
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