A hierarchical model for estimating the spatial distribution and abundance of animals detected by continuous-time recorders

PloS One
Robert M Dorazio, K Ullas Karanth

Abstract

Several spatial capture-recapture (SCR) models have been developed to estimate animal abundance by analyzing the detections of individuals in a spatial array of traps. Most of these models do not use the actual dates and times of detection, even though this information is readily available when using continuous-time recorders, such as microphones or motion-activated cameras. Instead most SCR models either partition the period of trap operation into a set of subjectively chosen discrete intervals and ignore multiple detections of the same individual within each interval, or they simply use the frequency of detections during the period of trap operation and ignore the observed times of detection. Both practices make inefficient use of potentially important information in the data. We developed a hierarchical SCR model to estimate the spatial distribution and abundance of animals detected with continuous-time recorders. Our model includes two kinds of point processes: a spatial process to specify the distribution of latent activity centers of individuals within the region of sampling and a temporal process to specify temporal patterns in the detections of individuals. We illustrated this SCR model by analyzing spatial and temporal...Continue Reading

References

Aug 12, 2016·Ecological Applications : a Publication of the Ecological Society of America·Angela K FullerMatthew P Hare

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Citations

Nov 7, 2018·Ecology and Evolution·Beth GardnerK Ullas Karanth
Jul 17, 2021·Ecology·Brett T McClintockDevin S Johnson

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Software Mentioned

R

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