An improved method to estimate pigeon populations in urban areas
| Autor: | Zaidett Barrientos, Carolina Seas |
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| Jazyk: | English<br />Spanish; Castilian |
| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Cuadernos de investigación UNED, Vol 10 (2018) |
| Druh dokumentu: | article |
| ISSN: | 1659-4266 1659-441X |
| DOI: | 10.22458/urj.v10i1.2039 |
| Popis: | The Rock Pigeon, Columba livia, is rare in natural environments but extremely successful in urban areas all over the world. Management programs are important because it is considered a pest in many cities. Nevertheless, no appropriate evaluation of methods to estimate urban pigeon populations is available in the literature. We compared three methods: a) the frequently used Stratified grids; b) Point counts, i.e. total pigeon counts with a mechanic counter in sampling points with a 50m radius; and c) Panoramas, 360o panoramic photographs. In nine urban parks in central Costa Rica, we made 1350 counts in total and compared: coefficient of variation (to assess precision); accuracy; time counting or taking photographs in situ; time merging photographs, counting pigeons in photographs, or typing data; and advantages or disadvantages. The Panorama Method is cheap, precise, accurate, secure, fast and easy. It can be used as an indicator or to estimate the actual population. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
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