Generating population estimates for common and widespread breeding birds in Ireland

Autor:	Olivia Crowe, John O'Halloran, Andy J. Musgrove
Rok vydání:	2014
Předmět:	Occupancy biology Ecology business.industry Zoology Distribution (economics) Troglodytes biology.organism_classification Population estimate Monitoring data Atlas data business Ecology Evolution Behavior and Systematics Nature and Landscape Conservation Count data
Zdroj:	Bird Study. 61:82-90
ISSN:	1944-6705 0006-3657
DOI:	10.1080/00063657.2013.868401
Popis:	Capsule Population estimates for 51 common breeding birds, totalling 62 million individuals, were estimated for Ireland.Aims To generate robust population estimates for common and widespread breeding birds across Ireland.Methods Densities were generated for common breeding birds using data from annual bird monitoring surveys using count data for all years between 2006 and 2010 inclusive. Bird atlas data were then used to (1) quantify the distribution of each species (10-km squares), and (2) generate an estimate of proportion occurrence of each species within each square. The total number of birds of each species was generated by multiplying proportion occupancy by the total area of the 10-km square and by the mean regional density generated from the bird monitoring data, and by summing the estimates of squares.Results Almost 62 million individuals of 51 common breeding birds were estimated. Wren Troglodytes troglodytes, with an estimate of more than 6 million individuals, contributed 10% of the total bird...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5cf5de880d678b56fa17d27efcc6f1a1 https://doi.org/10.1080/00063657.2013.868401 Zobrazit plný text záznamu