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Measurement error in a burrow index to monitor relative population size in the common vole

SYSNO ASEP	0084920
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Ostatní články
Title	Measurement error in a burrow index to monitor relative population size in the common vole
Title	Chyba měření norového indexu pro monitorování relativní velikosti populace u hraboše polního
Author(s)	Lisická, L. (CZ) Losík, J. (CZ) Zejda, Jan (UBO-W)_SAI Heroldová, Marta (UBO-W)_{RID, ORCID} Nesvadbová, Jiřina (UBO-W)_SAI Tkadlec, Emil (UBO-W)_{RID, ORCID, SAI}
Source Title	Folia zoologica. - : Ústav biologie obratlovců AV ČR, v. v. i. - ISSN 0139-7893 Roč. 56, č. 2 (2007), s. 169-176
Number of pages	8 s.
Language	eng - English
Country	CZ - Czech Republic
Keywords	bias ; colonisation ; dispersion ; Microtus arvalis ; precision ; sampling error
Subject RIV	EH - Ecology, Behaviour
R&D Projects	GA206/04/2003 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z60930519 - UBO-W (2005-2011)
Annotation	By examining the indices to monitor population size in the common vole, we found that relative sampling errors were enormous for low-density populations, attaining almost 400%. However, in high-density populations and for large sample sizes, the relative error dropped below 10% and the estimate is quite reliable. The dispersion of burrow entrances became more clumped at low population densities enhancing further the sampling variation. We demonstrated that the index is related to population size in a non-linear fashion, overestimating the population change at high densities. Consequently, population dynamics of the common vole described by the untransformed burrow index appear more variable than they are in reality.
Workplace	Institute of Vertebrate Biology
Contact	Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524
Year of Publishing	2008

Number of the records: 1