The many faces of helping: possible costs and benefits of infant carrying and food transfer in wild moustached tamarins (Saguinus mystax)

Hdl Handle:
http://hdl.handle.net/10545/596320
Title:
The many faces of helping: possible costs and benefits of infant carrying and food transfer in wild moustached tamarins (Saguinus mystax)
Authors:
Löttker, Petra; Huck, Maren ( 0000-0002-7740-3903 ) ; Heymann, Eckhard W.
Abstract:
Various hypotheses about adaptive and non-adaptive mechanisms of non-parental infant care have been put forward for different taxa (Emlen et al., 1991). The Neotropical callitrichid primates are renowned for their cooperative care of the twin litters. None of the studies conducted in the wild included information on genetic relationships within groups. This, however, is indispensable to evaluate the relevance of competing hypotheses concerning direct or indirect fitness gains. We studied two groups of wild moustached tamarins with known genetic relationships over a one-year period to examine individual time-budgets and contributions to infant carrying and food-transfer. With these data we tested whether helping behaviour might be a non-adaptive trait and, if not, whether indirect benefits via kin-selection could be excluded as an evolutionary force maintaining it. Other hypotheses on direct fitness benefits were discussed as far as (anecdotal) data permitted. Changes in time-budgets suggest costs, thus clearly refuting hypotheses assuming non-adaptivity. High within-group relatedness suggests kin-selection to be one driving force of maintaining the trait. However, non-parental individuals may help despite low relatedness. Data were not sufficient to decide which possible direct benefits most likely play a role in inducing non-relatives to help. Yet, two (non-exclusive) explanations seem to be the most probable ones: The chance to inherit the main-breeding position, and a certain chance of own direct reproductive success (the latter only for male helpers) due to polyandrous mating by the female. Other adaptive mechanisms may enhance benefits but are unlikely to be major selective forces since fitness gains are presumably rather small or uncertain.
Affiliation:
Abteilung für Soziobiologie, Deutsches Primatenzentrum, Göttingen; Lehrstuhl für Verhaltensforschung, Universität Bielefeld, Germany; Institut für Neuro- & Verhaltensbiologie, Abt. Verhaltensbiologie, Westfälische Wilhelms-Universität Münster, Germany
Citation:
The many faces of helping: possible costs and benefits of infant carrying and food transfer in wild moustached tamarins (Saguinus mystax) 2004, 141 (7):915 Behaviour
Journal:
Behaviour
Issue Date:
1-Jul-2004
URI:
http://hdl.handle.net/10545/596320
DOI:
10.1163/1568539042265635
Additional Links:
http://booksandjournals.brillonline.com/content/journals/10.1163/1568539042265635
Type:
Article
Language:
en
ISSN:
0005-7959; 1568-539X
Sponsors:
Deutsche Forschungsgemeinschaft (HE 1870/10-1,2)
Appears in Collections:
Biological Sciences Research Group

Full metadata record

DC FieldValue Language
dc.contributor.authorLöttker, Petraen
dc.contributor.authorHuck, Marenen
dc.contributor.authorHeymann, Eckhard W.en
dc.date.accessioned2016-02-15T14:43:30Zen
dc.date.available2016-02-15T14:43:30Zen
dc.date.issued2004-07-01en
dc.identifier.citationThe many faces of helping: possible costs and benefits of infant carrying and food transfer in wild moustached tamarins (Saguinus mystax) 2004, 141 (7):915 Behaviouren
dc.identifier.issn0005-7959en
dc.identifier.issn1568-539Xen
dc.identifier.doi10.1163/1568539042265635en
dc.identifier.urihttp://hdl.handle.net/10545/596320en
dc.description.abstractVarious hypotheses about adaptive and non-adaptive mechanisms of non-parental infant care have been put forward for different taxa (Emlen et al., 1991). The Neotropical callitrichid primates are renowned for their cooperative care of the twin litters. None of the studies conducted in the wild included information on genetic relationships within groups. This, however, is indispensable to evaluate the relevance of competing hypotheses concerning direct or indirect fitness gains. We studied two groups of wild moustached tamarins with known genetic relationships over a one-year period to examine individual time-budgets and contributions to infant carrying and food-transfer. With these data we tested whether helping behaviour might be a non-adaptive trait and, if not, whether indirect benefits via kin-selection could be excluded as an evolutionary force maintaining it. Other hypotheses on direct fitness benefits were discussed as far as (anecdotal) data permitted. Changes in time-budgets suggest costs, thus clearly refuting hypotheses assuming non-adaptivity. High within-group relatedness suggests kin-selection to be one driving force of maintaining the trait. However, non-parental individuals may help despite low relatedness. Data were not sufficient to decide which possible direct benefits most likely play a role in inducing non-relatives to help. Yet, two (non-exclusive) explanations seem to be the most probable ones: The chance to inherit the main-breeding position, and a certain chance of own direct reproductive success (the latter only for male helpers) due to polyandrous mating by the female. Other adaptive mechanisms may enhance benefits but are unlikely to be major selective forces since fitness gains are presumably rather small or uncertain.en
dc.description.sponsorshipDeutsche Forschungsgemeinschaft (HE 1870/10-1,2)en
dc.language.isoenen
dc.relation.urlhttp://booksandjournals.brillonline.com/content/journals/10.1163/1568539042265635en
dc.rightsArchived with thanks to Behaviouren
dc.rightsAn error occurred on the license name.en
dc.rights.uriAn error occurred getting the license - uri.en
dc.subjectPaternity analysisen
dc.subjectMating systemen
dc.subjectPrimateen
dc.subjectGenetic monopolizationen
dc.titleThe many faces of helping: possible costs and benefits of infant carrying and food transfer in wild moustached tamarins (Saguinus mystax)en
dc.typeArticleen
dc.contributor.departmentAbteilung für Soziobiologie, Deutsches Primatenzentrum, Göttingenen
dc.contributor.departmentLehrstuhl für Verhaltensforschung, Universität Bielefeld, Germanyen
dc.contributor.departmentInstitut für Neuro- & Verhaltensbiologie, Abt. Verhaltensbiologie, Westfälische Wilhelms-Universität Münster, Germanyen
dc.identifier.journalBehaviouren
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