Analysing age structure, residency and relatedness uncovers social network structure in aggregations of young birds

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Franks , V R , Ewen , J G , McCready , M , Rowcliffe , J M , Smith , D & Thorogood , R 2020 , ' Analysing age structure, residency and relatedness uncovers social network structure in aggregations of young birds ' , Animal Behaviour , vol. 166 , pp. 73-84 . https://doi.org/10.1016/j.anbehav.2020.06.005

Title: Analysing age structure, residency and relatedness uncovers social network structure in aggregations of young birds
Author: Franks, Victoria R.; Ewen, John G.; McCready, Mhairi; Rowcliffe, J. Marcus; Smith, Donal; Thorogood, Rose
Contributor organization: Helsinki Institute of Sustainability Science (HELSUS)
Evolution, Sociality & Behaviour
Helsinki Institute of Life Science HiLIFE
Date: 2020-08
Language: eng
Number of pages: 12
Belongs to series: Animal Behaviour
ISSN: 0003-3472
DOI: https://doi.org/10.1016/j.anbehav.2020.06.005
URI: http://hdl.handle.net/10138/346534
Abstract: Animal sociality arises from the cumulative effects of both individual social decisions and environmental factors. While juveniles' social interactions with parents prior to independence shape later life sociality, in most bird and mammal species at least one sex undergoes an early life dispersal before first-year reproduction. The social associations from this period could also have implications for later life yet are rarely characterized. Here, we derived predictions from available examples of juvenile groups in the literature (mobile 'flocks', spatially stable 'gangs' or adult-associated 'creches') and then used three cohorts of juvenile hihi, Notiomystis cincta, a threatened New Zealand passerine, to demonstrate how multistate modelling and social network analysis approaches can be used to characterize group type based on residency, movement, relatedness and social associations. At sites where hihi congregated, we found that juveniles were resighted at a higher frequency than adults and associated predominantly with unrelated juveniles rather than siblings or parents. Movement between group sites occurred, but associations developed predominantly within the sites. We suggest therefore that juvenile hihi social structure is most similar to a 'gang', a group structure in which juveniles congregate without adults at predictable sites. Such gangs have previously only been described formally in ravens, Corvus corax. By combining spatial and social network analyses, our study demonstrates how social group structures can be described and therefore facilitate broader comparisons and discussion about the form and function of juvenile groups across taxa. (C) 2020 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.
Subject: gang
juvenile
passerine
social groups
social networks
INFORMATION-CENTERS
PATTERNS
POPULATION
JUVENILE
BEHAVIOR
HABITAT
LIFE
ASSOCIATIONS
COMPETITION
COPULATION
1181 Ecology, evolutionary biology
Peer reviewed: Yes
Rights: cc_by_nc_nd
Usage restriction: openAccess
Self-archived version: acceptedVersion


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