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Causes and consequences of female centrality in cetacean societies

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Female_kinship_Phil_Trans_author_accepted.pdf (431.2Kb)
Date
09/2019
Author
Rendell, Luke Edward
Cantor, Mauricio
Gero, Shane
Whitehead, Hal
Mann, Janet
Keywords
Cetacean
Femle
Social evolution
Kinship
GC Oceanography
QH301 Biology
SDG 14 - Life Below Water
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Abstract
Cetaceans are fully aquatic predatory mammals that have successfully colonized virtually all marine habitats. Their adaptation to these habitats, so radically different from those of their terrestrial ancestors, can give us comparative insights into the evolution of female roles and kinship in mammalian societies. We provide a review of the diversity of such roles across the Cetacea, which are unified by some key and apparently invariable life-history features. Mothers are uniparous, while paternal care is completely absent as far as we currently know. Maternal input is extensive, lasting months to many years. Hence, female reproductive rates are low, every cetacean calf is a significant investment, and offspring care is central to female fitness. Here strategies diverge, especially between toothed and baleen whales, in terms of mother–calf association and related social structures, which range from ephemeral grouping patterns to stable, multi-level, societies in which social groups are strongly organized around female kinship. Some species exhibit social and/or spatial philopatry in both sexes, a rare phenomenon in vertebrates. Communal care can be vital, especially among deep-diving species, and can be supported by female kinship. Female-based sociality, in its diverse forms, is therefore a prevailing feature of cetacean societies. Beyond the key role in offspring survival, it provides the substrate for significant vertical and horizontal cultural transmission, as well as the only definitive non-human examples of menopause. This article is part of the theme issue ‘The evolution of female-biased kinship in humans and other mammals’.
Citation
Rendell , L E , Cantor , M , Gero , S , Whitehead , H & Mann , J 2019 , ' Causes and consequences of female centrality in cetacean societies ' , Philosophical Transactions of the Royal Society. B, Biological Sciences , vol. 374 , no. 1780 , 20180066 . https://doi.org/10.1098/rstb.2018.0066
Publication
Philosophical Transactions of the Royal Society. B, Biological Sciences
Status
Peer reviewed
DOI
https://doi.org/10.1098/rstb.2018.0066
ISSN
0962-8436
Type
Journal item
Rights
© 2019, the Author(s) Published by the Royal Society. All rights reserved. This work has been made available online in accordance with the publisher's policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1098/rstb.2018.0066
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/18114

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