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| Content Provider | Springer Nature Link |
|---|---|
| Author | Dulisz, Beata wakowski, Jacek J. Górnik, Joanna |
| Copyright Year | 2016 |
| Abstract | Data collected out of the breeding season suggest that House sparrows (Passer domesticus) from the urban populations are characterized by a smaller body size and poorer body condition compared to birds from rural populations. Considering an urbanized Eurasian Sparrowhawk (Accipiter nisus) and other potential predators, a new predator-prey dependency is developing that can also be a reason for the House sparrow’s poorer condition. This study was aimed at comparing the multivariate biometrical characteristics and few body condition indices of adult birds from urban and rural populations during the breeding season. It was hypothesized that a higher predation risk during the breeding season concerns mainly males, thus affecting their poorer condition. Most of the condition indices of males were significantly lower in the urban population. Males from the urban populations had lower body mass, shorter tarsus, longer alula, greater Kipp’s distance and higher wing pointedness index in comparison to the birds from rural populations, whereas these differences were not found between females. We suggest that the lower body condition and biometric differences in the analyzed birds are a means of adapting to the new predator-prey scheme in accordance to the tradeoff theory between starvation and predation risks. A lower condition of birds in poor foraging urban habitats and higher predation risk may be indicative of a declining population. |
| Starting Page | 1307 |
| Ending Page | 1324 |
| Page Count | 18 |
| File Format | |
| ISSN | 10838155 |
| Journal | Urban Ecosystems |
| Volume Number | 19 |
| Issue Number | 3 |
| e-ISSN | 15731642 |
| Language | English |
| Publisher | Springer US |
| Publisher Date | 2016-02-29 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Adaptation traits Bird flight’s adaptation Body condition index House Sparrow population decline Morphometry Natural selection Urban birds Urban Ecology Environmental Management Ecology Nature Conservation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ecology Urban Studies |
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