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Importancia de Considerar la Heterogeneidad de Detección al Estimar la Abundancia: el Caso de Lobos Franceses
Author(s) -
CUBAYNES SARAH,
PRADEL ROGER,
CHOQUET RÉMI,
DUCHAMP CHRISTOPHE,
GAILLARD JEANMICHEL,
LEBRETON JEANDOMINIQUE,
MARBOUTIN ERIC,
MIQUEL CHRISTIAN,
REBOULET ANNEMARIE,
POILLOT CAROLE,
TABERLET PIERRE,
GIMENEZ OLIVIER
Publication year - 2010
Publication title -
conservation biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.2
H-Index - 222
eISSN - 1523-1739
pISSN - 0888-8892
DOI - 10.1111/j.1523-1739.2009.01431.x
Subject(s) - mark and recapture , abundance (ecology) , population , estimator , population size , abundance estimation , statistics , estimation , biology , geography , ecology , econometrics , mathematics , demography , economics , sociology , management
Assessing conservation strategies requires reliable estimates of abundance. Because detecting all individuals is most often impossible in free‐ranging populations, estimation procedures have to account for a <1 detection probability. Capture–recapture methods allow biologists to cope with this issue of detectability. Nevertheless, capture–recapture models for open populations are built on the assumption that all individuals share the same detection probability, although detection heterogeneity among individuals has led to underestimating abundance of closed populations. We developed multievent capture–recapture models for an open population and proposed an associated estimator of population size that both account for individual detection heterogeneity (IDH). We considered a two‐class mixture model with weakly and highly detectable individuals to account for IDH. In a noninvasive capture–recapture study of wolves we based on genotypes identified in feces and hairs, we found a large underestimation of population size (27% on average) occurred when IDH was ignored .