Animal Density and Acoustic Detection: An Interview with Ben Stevenson

David Warton (University of New South Wales) interviews  interviews  Ben Stevenson (University of St Andrews) about his 2015 Methods in Ecology and Evolution paper ‘A general framework for animal density estimation from acoustic detections across a fixed microphone array’. They also discuss what Ben is currently up to, including an interesting new method for dealing with uncertain identification in capture-recapture, published in Statistical Science as ‘Trace-Contrast Models for Capture–Recapture Without Capture Histories’.

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Issue 6.5

Issue 6.5 is now online!

The May issue of Methods is now online!

We have two freely available articles this month: one Application and one Open Access Article.

rSPACE: An open-source R package for implementing a spatially based power analysis for designing monitoring programs. This method incorporates information on species biology and habitat to parameterize a spatially explicit population simulation.

Tim Lucas et al. provide this month’s Open Access article: A generalised random encounter model for estimating animal density with remote sensor data. The authors have developed a Generalised Random Encounter Model (gREM) to estimate absolute animal density from count data from both camera traps and acoustic detectors. They show that gREM produces accurate estimates of absolute animal density for all combinations of sensor detection widths and animal signal widths. This model is applicable for count data obtained in both marine and terrestrial environments, visually or acoustically. It could be used for big cats, sharks, birds, echolocating bats, cetaceans and much more. Continue reading