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Author | Bourjade, M.; Thierry, B.; Maumy, M.; Petit, O. | ||||
Title | Decision-making in Przewalski horses (Equus ferus przewalskii) is driven by the ecological contexts of collective movements | Type | Journal Article | ||
Year | 2009 | Publication | Ethology | Abbreviated Journal | Ethology |
Volume | 115 | Issue | 4 | Pages | 321-330 |
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Abstract | We addressed decision-making processes in the collective movements of two groups of Przewalski horses (Equus ferus przewalskii) living in a semi free-ranging population. We investigated whether different patterns of group movement are related to certain ecological contexts (habitat use and group activity) and analysed the possible decision-making processes involved. We found two distinct patterns; ‘single-bout’ and ‘multiplebout’ movements occurred in both study groups. The movements were defined by the occurrence of collective stops between bouts and differed by their duration, distance covered and ecological context. For both movements, we found that a preliminary period involving several horses occurred before departure. In single-bout movements, all group members rapidly joined the first moving horse, independently of the preliminary period. In multiple-bout movements, however, the joining process was longer; in particular when the number of decision-makers and their pre-departure behaviour before departure increased. Multiplebout movements were more often used by horses to switch habitats and activities. This observation demonstrates that the horses need more time to resolve motivational conflicts before these departures. We conclude that decision-making in Przewalski horses is based on a shared consensus process driven by ecological determinants. |
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Notes | Approved | no | |||
Call Number | Equine Behaviour @ team @ | Serial | 4801 | ||
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Author | Bourjade, M.; Moulinot, M.; Henry, S.; Richard-Yris, M.-A. Hausberger.M | ||||
Title | Could Adults be Used to Improve Social Skills of Young Horses, Equus caballus? | Type | Journal Article | ||
Year | 2008 | Publication | Ethology | Abbreviated Journal | Ethology |
Volume | 50 | Issue | 4 | Pages | 408-417 |
Keywords | horse • social influence • young-adult interaction • social development | ||||
Abstract | We investigated the effects of the introduction of foreign adults on the behavior of young horses. First, we observed the behavior of 1- and 2-year-old domestic horses housed in same-age and same-sex groups (a standard housing system, but different from a natural situation). Then, two same-sex adults were introduced into each experimental group. Observations made before, during and after an introduction indicated that young horses reared in homogeneous groups of young had different behaviors compared to other domestic horses reared under more socially natural conditions. After the introduction of adults, young horses expressed new behaviors, preferential social associations emerged, positive social behavior increased and agonistic interactions decreased. These results have important implications both for understanding the influence that adults may have on the behavior of young horses, and in terms of husbandry, indicating the importance of keeping young horses with adults, although further studies are still necessary. © 2008 Wiley Periodicals, Inc. Dev Psychobiol 50: 408-417, 2008. | ||||
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Publisher | Place of Publication | Editor | |||
Language | Summary Language | Original Title | |||
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ISSN | ISBN | Medium | |||
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Notes | Approved | no | |||
Call Number | Equine Behaviour @ team @ | Serial | 4800 | ||
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