Abstract
Assessing population density is crucial for studying the ecology and evolutionary biology of species as well as for conservation purposes. Here we used point count methods to infer population density in a single-island endemic passerine bird, the Réunion Grey White-eye Zosterops borbonicus, that displays striking evidence of differentiation at a small spatial scale. Population density was estimated at 5.17 birds ha−1 (CL 4.85–5.50), a value somewhat higher than previously believed. This estimation provides the first detailed estimation of bird population density in the vulnerable summit ecosystems of Réunion and will possibly allow a better understanding of the evolutionary causes of this plumage colour variation.
Original language | English |
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Pages (from-to) | 85-88 |
Number of pages | 4 |
Journal | Ostrich: Journal of African Ornithology |
Volume | 87 |
Issue number | 1 |
Early online date | 30 Nov 2015 |
DOIs | |
Publication status | Published - 30 Apr 2016 |
Keywords
- Indian Ocean
- Mascarene Islands
- distance sampling
- island endemism
- point census
- point count