| Abstract: | We evaluated the relationship between spatial variability in prey and food habits of eastern imperial eagles Aquila heliaca at a 90,000 ha national nature reserve in north-central Kazakhstan. Eagle diet varied greatly within the population and the spatial structure of eagle diet within the population varied according to the scale of measurement. Patterns in dietary response were inconsistent with expectations if either ontogenetic imprinting or competition determined diet choice, but they met expectations if functional response determined diet. Eagles nesting near a high-density prey resource used that resource almost exclusively. In contrast, in locations with no single high-density prey species, eagles‘ diet was more diverse. Our results demonstrate that spatial structuring of diet of vertebrate predators can provide important insight into the mechanisms that drive dietary decisions. ?? OIKOS. |
| Genre: | Article |
| ProdID: | 70028731 |
| Citation Author: | Katzner, T. E.; Bragin, E. A.; Knick, S. T.; Smith, A. T. |
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| Citation End Page: | 600 |
| Citation Issue: | 6 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Avian Biology |
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| Citation Number Of Pages: | 7 |
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| Citation Search Results Text: | Spatial structure in the diet of imperial eagles Aquila heliaca in Kazakhstan; 2006; Article; Journal; Journal of Avian Biology; Katzner, T. E.; Bragin, E. A.; Knick, S. T.; Smith, A. T. |
| Citation Start Page: | 594 |
| Citation Volume: | 37 |
| Citation Year: | 2006 |
| Type: | citation/reference |
| Text: | Spatial structure in the diet of imperial eagles Aquila heliaca in Kazakhstan; 2006; Article; Journal; Journal of Avian Biology; Katzner, T. E.; Bragin, E. A.; Knick, S. T.; Smith, A. T. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1111/j.2006.0908-8857.03617.x |
| Date Other: | Sun, 1 Jan 2006 00:00 -0600 |
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