Search path of a fossorial herbivore, Geomys bursarius, foraging in structurally complex plant communities

Journal of Mammalogy
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Abstract

The influence of habitat patchiness and unpalatable plants on the search path of the plains pocket gopher (Geomys bursarius) was examined in outdoor enclosures. Separate experiments were used to evaluate how individual animals explored (by tunnel excavation) enclosures free of plants except for one or more dense patches of a palatable plant (Daucus carota), a dense patch of an unpalatable species (Pastinaca sativa) containing a few palatable plants (D. carota), or a relatively sparse mixture of palatable (D. carota) and unpalatable (Raphanus sativus) species. Only two of eight individuals tested showed the predicted pattern of concentrating search effort in patches of palatable plants. The maintenance of relatively high levels of effort in less profitable sites may reflect the security afforded food resources by the solitary social system and fossorial lifestyle of G. bursarius. Unpalatable plants repelled animals under some conditions, but search paths in the sparsely planted mixed-species treatment suggest animals can use visual or other cues to orient excavations. Evidence supporting area-restricted search was weak. More information about the use of visual cues by G. bursarius and the influence of experience on individual search mode is needed for refining current models of foraging behavior in this species.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Search path of a fossorial herbivore, Geomys bursarius, foraging in structurally complex plant communities
Series title Journal of Mammalogy
DOI 10.2307/1382165
Volume 71
Issue 2
Year Published 1990
Language English
Publisher American Society of Mammalogists
Publisher location Provo, UT
Description 11 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Journal of Mammalogy
First page 177
Last page 187
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