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Estimating species-specific suvival and movement when species identification is uncertain

Ecology

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Abstract

Incorporating uncertainty in the investigation of ecological studies has been the topic of an increasing body of research. In particular, mark?recapture methodology has shown that incorporating uncertainty in the probability of detecting individuals in populations enables accurate estimation of population-level processes such as survival, reproduction, and dispersal. Recent advances in mark?recapture methodology have included estimating population-level processes for biologically important groups despite the misassignment of individuals to those groups. Examples include estimating rates of apparent survival despite less than perfect accuracy when identifying individuals to gender or breeding state. Here we introduce a method for estimating apparent survival and dispersal in species that co-occur but that are difficult to distinguish. We use data from co-occurring populations of meadow voles (Microtus pennsylvanicus) and montane voles (M. montanus) in addition to simulated data to show that ignoring species uncertainty can lead to biased estimates of population processes. The incorporation of species uncertainty in mark?recapture studies should aid future research investigating ecological concepts such as interspecific competition, niche differentiation, and spatial population dynamics in sibling species.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Estimating species-specific suvival and movement when species identification is uncertain
Series title:
Ecology
Volume
88
Issue:
2
Year Published:
2007
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
282-288
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Ecology
First page:
282
Last page:
288