期刊
ANIMAL BEHAVIOUR
卷 112, 期 -, 页码 93-104出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.anbehav.2015.11.017
关键词
acoustic discrimination; black-capped chickadee; categorization; geographical variation; operant conditioning; song
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC) [RGPIN 249884]
- Discovery Accelerator Supplement (NSERC) [RGPAS 412311]
- Alberta Ingenuity Fund (AIF) New Faculty Grant
- Canada Foundation for Innovation (CFI) New Opportunities Fund (NOF)
- Canada Foundation for Innovation (CFI) Infrastructure Operating Fund (IOF)
- University of Alberta (UofA)
- Izaak Walton Killiam Memorial Scholarship (IWKMS)
- NSERC post-graduate scholarship
- AIF Graduate student scholarship
- European Research Council [230604 'SOMACCA']
- NSERC Banting fellowship
- Austrian Science Fund (FWF)
The songs of many songbird species vary geographically, yet, the songs of black-capped chickadees, Poecile atricapillus, show remarkable consistency across most of the species' North American range. Previous research has described subtle variations in the song of this species by comparing songs produced by males at distant parts of the species' range (British Columbia and Ontario). In the current study, we used an operant discrimination task to examine whether birds classify the songs produced by males in these two previously studied locations as belonging to distinct open-ended categories. In both experiments, when birds were presented with new songs, they continued to respond to songs from the same geographical location as the songs that were reinforced during initial discrimination training, suggesting that birds were using open-ended categorization. We also presented birds with songs in which we manipulated acoustic features in order to examine the acoustic mechanisms used during discrimination; results provide support that birds use the duration of the song when discriminating, but the results also suggest that birds used additional acoustic features. Taken together, these experiments show that black-capped chickadees classify songs into open-ended, geography-based categories, and provide compelling evidence that perceptible acoustic differences exist in a vocalization that is seemingly consistent across the species' range. (C) 2015 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.
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