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TO SYNCHRONISE OR NOT TO SYNCHRONISE: A DILEMMA FOR YOUNG BIGHORN MALES?
in BehaviourSearch for other papers by Ruckstuhl in
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Abstract
Bighorn sheep (Ovis canadensis) are sexually dimorphic and live in nursery groups, bachelor or mixed groups. To remain in a group, individuals have to synchronise their activity according to the type of group they are in, which may incur a cost for individuals of different body size from the other group members. To test this hypothesis, I calculated the degree of synchrony of activities for each individual within a group. Animals in nursery or bachelor groups were highly synchronised with each other while mixed-age-sex groups had the lowest group synchronisation index. Two and three-year old bighorn males are intermediate in body size between the two adult sexes. Two-year-old males always adjusted their behaviour independent of group type, while three-year-old males synchronised their behaviour when with bachelor, but less so when in nursery groups. I suggest that two- and three-year-old males may face a conflict between synchronising their behaviour to stay in a group and the need to forage according to their own time budgets. I conclude that intermediate-sized young male ungulates of sexually dimorphic species may be better off forming same-sex-age groups.
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| Insgesamt | Letzte 365 Tage | In den letzten 30 Tagen | |
|---|---|---|---|
| Aufrufe von Kurzbeschreibungen | 932 | 100 | 14 |
| Gesamttextansichten | 210 | 3 | 0 |
| PDF-Downloads | 135 | 6 | 0 |
TO SYNCHRONISE OR NOT TO SYNCHRONISE: A DILEMMA FOR YOUNG BIGHORN MALES?
in BehaviourSearch for other papers by Ruckstuhl in
Current site
Google Scholar
PubMed
Abstract
Bighorn sheep (Ovis canadensis) are sexually dimorphic and live in nursery groups, bachelor or mixed groups. To remain in a group, individuals have to synchronise their activity according to the type of group they are in, which may incur a cost for individuals of different body size from the other group members. To test this hypothesis, I calculated the degree of synchrony of activities for each individual within a group. Animals in nursery or bachelor groups were highly synchronised with each other while mixed-age-sex groups had the lowest group synchronisation index. Two and three-year old bighorn males are intermediate in body size between the two adult sexes. Two-year-old males always adjusted their behaviour independent of group type, while three-year-old males synchronised their behaviour when with bachelor, but less so when in nursery groups. I suggest that two- and three-year-old males may face a conflict between synchronising their behaviour to stay in a group and the need to forage according to their own time budgets. I conclude that intermediate-sized young male ungulates of sexually dimorphic species may be better off forming same-sex-age groups.
| Insgesamt | Letzte 365 Tage | In den letzten 30 Tagen | |
|---|---|---|---|
| Aufrufe von Kurzbeschreibungen | 932 | 100 | 14 |
| Gesamttextansichten | 210 | 3 | 0 |
| PDF-Downloads | 135 | 6 | 0 |
