Evidence for selective caching by arctic ground squirrels living in alpine meadows in the Yukon
ABSTRACT. Male arctic ground squirrels (Spermophilus parryii) rely on food they cached the previous year for the energy they need to compete for mates each spring. We collected cheek-pouch contents of arctic ground squirrels trapped during three summers (2000–02) as an indication of what squirrels c...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.494.196 2023-05-15T14:19:38+02:00 Evidence for selective caching by arctic ground squirrels living in alpine meadows in the Yukon Elizabeth A. Gillis Shawn F. Morrison Grant D. Zazula David S. Hik The Pennsylvania State University CiteSeerX Archives 2005 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.494.196 http://pubs.aina.ucalgary.ca/arctic/Arctic58-4-354.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.494.196 http://pubs.aina.ucalgary.ca/arctic/Arctic58-4-354.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.aina.ucalgary.ca/arctic/Arctic58-4-354.pdf text 2005 ftciteseerx 2016-01-08T08:40:49Z ABSTRACT. Male arctic ground squirrels (Spermophilus parryii) rely on food they cached the previous year for the energy they need to compete for mates each spring. We collected cheek-pouch contents of arctic ground squirrels trapped during three summers (2000–02) as an indication of what squirrels cached. Among adults, both males and females carried material in their cheek pouches, but males did so more frequently than females (4.4 % vs. 0.6 % of captures). Males carried material later in the summer than females, and also carried different material (seeds and rhizomes as opposed to nesting material). These differences probably reflect different purposes of cheek-pouch contents—females carried material for immediate use, whereas males carried food for caching. Only 24 of over 100 species of vascular plants growing at our alpine study site were carried, and presumably cached, by male arctic ground squirrels. The seeds or rhizomes of one species, Polygonum viviparum, were found in over 90 % of cheek-pouch contents examined, even though that species grew at relatively low density and was no more common than another species in the same genus (Polygonum bistorta) that was never found in cheek-pouch contents. Collectively, this evidence indicates that males are highly selective in what species they cache. Many of the species carried by arctic ground squirrels in this study have also been found in Pleistocene fossil caches from central Yukon, indicating that food preferences of this species may have remained stable over time. Key words: arctic ground squirrel, Spermophilus parryii, food caching, hoarding, Polygonum, alpine RÉSUMÉ. Les spermophiles arctiques mâles (Spermophilus parryii) dépendent de la nourriture qu’ils ont cachée l’année précédente pour obtenir l’énergie dont ils ont besoin pour se trouver une compagne d’accouplement au printemps. On a recueilli Text Arctic Arctic ground squirrel Arctic Arctique* Polygonum viviparum Yukon Unknown Arctic Yukon |
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English |
description |
ABSTRACT. Male arctic ground squirrels (Spermophilus parryii) rely on food they cached the previous year for the energy they need to compete for mates each spring. We collected cheek-pouch contents of arctic ground squirrels trapped during three summers (2000–02) as an indication of what squirrels cached. Among adults, both males and females carried material in their cheek pouches, but males did so more frequently than females (4.4 % vs. 0.6 % of captures). Males carried material later in the summer than females, and also carried different material (seeds and rhizomes as opposed to nesting material). These differences probably reflect different purposes of cheek-pouch contents—females carried material for immediate use, whereas males carried food for caching. Only 24 of over 100 species of vascular plants growing at our alpine study site were carried, and presumably cached, by male arctic ground squirrels. The seeds or rhizomes of one species, Polygonum viviparum, were found in over 90 % of cheek-pouch contents examined, even though that species grew at relatively low density and was no more common than another species in the same genus (Polygonum bistorta) that was never found in cheek-pouch contents. Collectively, this evidence indicates that males are highly selective in what species they cache. Many of the species carried by arctic ground squirrels in this study have also been found in Pleistocene fossil caches from central Yukon, indicating that food preferences of this species may have remained stable over time. Key words: arctic ground squirrel, Spermophilus parryii, food caching, hoarding, Polygonum, alpine RÉSUMÉ. Les spermophiles arctiques mâles (Spermophilus parryii) dépendent de la nourriture qu’ils ont cachée l’année précédente pour obtenir l’énergie dont ils ont besoin pour se trouver une compagne d’accouplement au printemps. On a recueilli |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Elizabeth A. Gillis Shawn F. Morrison Grant D. Zazula David S. Hik |
spellingShingle |
Elizabeth A. Gillis Shawn F. Morrison Grant D. Zazula David S. Hik Evidence for selective caching by arctic ground squirrels living in alpine meadows in the Yukon |
author_facet |
Elizabeth A. Gillis Shawn F. Morrison Grant D. Zazula David S. Hik |
author_sort |
Elizabeth A. Gillis |
title |
Evidence for selective caching by arctic ground squirrels living in alpine meadows in the Yukon |
title_short |
Evidence for selective caching by arctic ground squirrels living in alpine meadows in the Yukon |
title_full |
Evidence for selective caching by arctic ground squirrels living in alpine meadows in the Yukon |
title_fullStr |
Evidence for selective caching by arctic ground squirrels living in alpine meadows in the Yukon |
title_full_unstemmed |
Evidence for selective caching by arctic ground squirrels living in alpine meadows in the Yukon |
title_sort |
evidence for selective caching by arctic ground squirrels living in alpine meadows in the yukon |
publishDate |
2005 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.494.196 http://pubs.aina.ucalgary.ca/arctic/Arctic58-4-354.pdf |
geographic |
Arctic Yukon |
geographic_facet |
Arctic Yukon |
genre |
Arctic Arctic ground squirrel Arctic Arctique* Polygonum viviparum Yukon |
genre_facet |
Arctic Arctic ground squirrel Arctic Arctique* Polygonum viviparum Yukon |
op_source |
http://pubs.aina.ucalgary.ca/arctic/Arctic58-4-354.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.494.196 http://pubs.aina.ucalgary.ca/arctic/Arctic58-4-354.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766291414766845952 |