Importance of Accounting for Detection Heterogeneity When Estimating Abundance: the Case of French Wolves - Archive ouverte HAL Access content directly
Journal Articles Conservation Biology Year : 2010

Importance of Accounting for Detection Heterogeneity When Estimating Abundance: the Case of French Wolves

Sarah Cubaynes
Roger Pradel
  • Function : Author
Rémi Choquet
  • Function : Author
Christophe Duchamp
  • Function : Author
Jean-Michel Gaillard
Jean-Dominique Lebreton
  • Function : Author
Eric Marboutin
  • Function : Author
Christian Miquel
  • Function : Author
Anne-Marie Reboulet
  • Function : Author
Carole Poillot
  • Function : Author
Pierre Taberlet

Abstract

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.
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hal-03499369 , version 1 (04-01-2022)

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Sarah Cubaynes, Roger Pradel, Rémi Choquet, Christophe Duchamp, Jean-Michel Gaillard, et al.. Importance of Accounting for Detection Heterogeneity When Estimating Abundance: the Case of French Wolves. Conservation Biology, 2010, 24, pp.621 - 626. ⟨10.1111/j.1523-1739.2009.01431.x⟩. ⟨hal-03499369⟩

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