Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If you need an accessible version of this item please contact JSTOR User Support

Social Caching and Observational Spatial Memory in Pinyon Jays

Peter A. Bednekoff and Russell P. Balda
Behaviour
Vol. 133, No. 11/12 (Sep., 1996), pp. 807-826
Published by: Brill
Stable URL: http://www.jstor.org/stable/4535397
Page Count: 20
  • Read Online (Free)
  • Download ($34.00)
  • Subscribe ($19.50)
  • Cite this Item
If you need an accessible version of this item please contact JSTOR User Support
Social Caching and Observational Spatial Memory in Pinyon Jays
Preview not available

Abstract

In the wild, pinyon jays (Gymnorhinus cyanocephalus) live in large, integrated flocks and cache tens of thousands of seeds per year. This study explored social aspects of caching and recovering by pinyon jays. In Experiment 1, birds cached in a large experimental room under three conditions: alone, paired with a dominant, and paired with a subordinate. In all cases, birds recovered caches alone seven days later. Individuals ate more seeds before caching when alone than when paired and started caching sooner when subordinate than when dominant. Pinyon jays accurately returned to sites containing their own caches but not to sites containing caches made by partner birds. However, they went to areas containing partner caches sooner than would be expected, indicating memory for the general areas containing caches made by other pinyon jays. In Experiments 2 and 3 birds were placed closer to each other and allowed to recover one or two days after caching. In Experiment 2, both free-flying and caged observers found caches with accuracies above chance. Cachers made significantly fewer errors than observers. During Experiment 3, caged observers saw the cachers recover some seeds one day after they were cached. On the next day cachers and observers were separately allowed to visit all cache sites. Both cachers and observers performed accurately and did not differ in accuracy. Neither group discriminated between extant and depleted caches. Observational spatial memory in pinyon jays may allow economical cache robbery by wild pinyon jays under some circumstances, particularly shortly after caches are created.

Page Thumbnails

  • Thumbnail: Page 
[807]
    [807]
  • Thumbnail: Page 
808
    808
  • Thumbnail: Page 
809
    809
  • Thumbnail: Page 
810
    810
  • Thumbnail: Page 
811
    811
  • Thumbnail: Page 
812
    812
  • Thumbnail: Page 
813
    813
  • Thumbnail: Page 
814
    814
  • Thumbnail: Page 
815
    815
  • Thumbnail: Page 
816
    816
  • Thumbnail: Page 
817
    817
  • Thumbnail: Page 
818
    818
  • Thumbnail: Page 
819
    819
  • Thumbnail: Page 
820
    820
  • Thumbnail: Page 
821
    821
  • Thumbnail: Page 
822
    822
  • Thumbnail: Page 
823
    823
  • Thumbnail: Page 
824
    824
  • Thumbnail: Page 
825
    825
  • Thumbnail: Page 
826
    826