Seed choice differs by sex in sooty mangabeys (Cercocebus atys).
Durophagy
Food mechanical properties
Food selection
Taï National Park
Journal
Primates; journal of primatology
ISSN: 1610-7365
Titre abrégé: Primates
Pays: Japan
ID NLM: 0401152
Informations de publication
Date de publication:
Mar 2021
Mar 2021
Historique:
received:
21
06
2020
accepted:
02
09
2020
pubmed:
23
9
2020
medline:
24
8
2021
entrez:
22
9
2020
Statut:
ppublish
Résumé
The sooty mangabey (Cercocebus atys) practices year-round durophagy. A large part of the C. atys diet consists of the oily nut of Sacoglottis gabonensis, which is accessed by post-canine crushing of the hard, protective seed coat. During a typical foraging bout, some seeds are discarded after initial crushing attempts using isometric biting, but the reason mangabeys reject some seeds and break into others is unclear. Although C. atys is sexually dimorphic, little is known about whether differences between males and females affect the selectivity of mechanically protected foods. We studied C. atys feeding on S. gabonensis in the Taï National Park, Côte d'Ivoire, in July and August 2016. Nuts discarded after an initial crushing attempt were collected and their hardness measured using a Shore D durometer. Measurements were taken in the region of the nut where monkeys attempted to crush it. Hardness values of nuts rejected by adult male (n = 79) and adult female (n = 104) C. atys were compared to those of a control assemblage of nuts collected randomly on the forest floor (n = 69). Nuts rejected by either sex do not differ statistically from the random sample; however, they do differ from each other, with females rejecting harder nuts. This suggests that males are more effective at broaching harder seed husks, and discard seeds based on other factors.
Identifiants
pubmed: 32960404
doi: 10.1007/s10329-020-00863-w
pii: 10.1007/s10329-020-00863-w
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
361-367Subventions
Organisme : National Science Foundation
ID : BCS 0840110, 0921770, 0922429
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