Bowers, M. A. & Adams-Manson, R. H. 1993: Information and patch exploitation strategies of the eastern chipmunk, Tamias striatus (Rodentia: Sciuridae). Ethology 95, 299–308.
Information and Patch Exploitation Strategies of the Eastern Chipmunk, Tamias striatus (Rodentia: Sciuridae)
Article first published online: 26 APR 2010
1993 Blackwell Verlag GmbH
Volume 95, Issue 4, pages 299–308, January-December 1993
How to Cite
Bowers, M. A. and Adams-Manson, R. H. (1993), Information and Patch Exploitation Strategies of the Eastern Chipmunk, Tamias striatus (Rodentia: Sciuridae). Ethology, 95: 299–308. doi: 10.1111/j.1439-0310.1993.tb00479.x
- Issue published online: 26 APR 2010
- Article first published online: 26 APR 2010
- Received: May 12, 1993; Accepted: August 20, 1993
We examined to what extent 15 chipmunks foraging from dishes in the field varied load sizes depending on a predetermined sequence of resource renewal/removal. At 10-m distances from burrows, chipmunks collected smaller loads when seeds were replenished over sequential trials and larger load sizes when trials were interrupted by removing all seeds for one visit. Similar sequence effects were less obvious at 0 m. Load size also varied with travel time but not in a manner consistent with either long-term rate maximization or resource tracking. When travel time effects were removed, sequence effects became more pronounced at distances of both 0 and 10 m. The results suggest that chipmunks use past experience in patches to gauge expected returns in the future, and that they devalue resources according to their uncertainty (“future discounting”). That chipmunks varied load sizes with food renewal/removal more at 10 than 0 m from burrows suggests that the degree to which chipmunks devalue future resources may depend on how defendable those resources are.