The status of the Ring OuzelTurdus torquatusin the UK in 2012
| Autor: | Andrew J. Stanbury, Simon R. Wotton, Andrew Douse, Mark A. Eaton |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Estimation education.field_of_study biology Ring ouzel Range (biology) Population biology.organism_classification 010603 evolutionary biology 01 natural sciences 010605 ornithology Population estimate Survey methodology Geography education Transect Ecology Evolution Behavior and Systematics Nature and Landscape Conservation Demography |
| Zdroj: | Bird Study. 63:155-164 |
| ISSN: | 1944-6705 0006-3657 |
| Popis: | Capsule: There were up to 6348 Ring Ouzel territories in the UK in 2012.Aims: To produce estimates of the size of the Ring Ouzel breeding population in the UK and its constituent countries.Methods: A stratified random selection of tetrads was surveyed within the known breeding range, except for the remaining breeding areas on Dartmoor and historical sites elsewhere, which were surveyed in their entirety. The methods followed those devised for the first UK-wide survey in 1999, using playback of song at specific points along tetrad transect lines.Results: The UK population estimate in 2012 was 5332 (95% confidence limits (CL), 4096–6875) territories, a non-significant decline of 29% since 1999. There were no significant differences in the population changes in England, Scotland and Wales between the two surveys. An estimation of survey efficiency found that 84% of territories were located by the national survey methods, suggesting that the UK population in 2012 could have been as many as 6348 (95% C... |
| Databáze: | OpenAIRE |
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