AI Article Synopsis
- The hippocampus size varies between species and sexes, influencing how well they use spatial memory for finding key resources like food and mates.
- Black-capped chickadees demonstrate a greater food caching behavior than Mexican chickadees or bridled titmice, performing better in experiments designed to test food storage abilities.
- The larger hippocampus in black-capped chickadees suggests that their superior food storing skills have led to evolutionary adaptations in their memory and spatial processing capabilities.
Article Abstract
The size of the hippocampus has been previously shown to reflect species differences and sex differences in reliance on spatial memory to locate ecologically important resources, such as food and mates. Black-capped chickadees (Parus atricapillus) cached more food than did either Mexican chickadees (P. sclateri) or bridled titmice (P. wollweberi) in two tests of food storing, one conducted in an aviary and another in smaller home cages. Black-capped chickadees were also found to have a larger hippocampus, relative to the size of the telencephalon, than the other two species. Differences in the frequency of food storing behavior among the three species have probably produced differences in the use of hippocampus-dependent memory and spatial information processing to recover stored food, resulting in graded selection for size of the hippocampus.
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| http://dx.doi.org/10.1159/000113385 | DOI Listing |
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