Sex differences in food acquisition and aggression in captive common marmosets (Callithrix jacchus) |
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Authors: | Anne M Michels |
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Institution: | (1) University of Tennessee, Tennessee;(2) Present address: Natural History Museum, University of Kansas, Dyche Hall, 66045-2454 Lawrence, Kansas, USA |
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Abstract: | Competition for food within the social group has been postulated as an important factor affecting primate social organization.
This study examined how factors such as sex, aggression, dispersion of food, and amount of difficulty involved in obtaining
food affect the distribution of food in common marmoset (Callithrix jacchus) social groups. Mated pairs of adultC. jacchus were presented with food that was either dispersed or concentrated, and either difficult or easy, to obtain. The number of
food pieces obtained, aggressive displays, incidents of physical aggression, and amount of time spent searching for food were
recorded for each animal. Neither dispersion nor difficulty in obtaining food had significant effects on the distribution
of food or any of the other behaviors examined. The primary factors affecting food distribution were aggression and amount
of time spent searching. Females obtained more food than males in all situations because they were more aggressive and apparently
more motivated to search for food than were males. |
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Keywords: | Aggression Sex Food Foraging Callithrix jacchus |
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