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Using Continuous-Time Spatial Capture-Recapture models to make inference about animal activity patterns.

Greg B Distiller1, David L Borchers2, Rebecca J Foster3

  • 1Department of Statistical Sciences Centre for Statistics in Ecology, Environment and Conservation (SEEC) University of Cape Town Cape Town South Africa.

Ecology and Evolution
|November 4, 2020
PubMed
Summary
This summary is machine-generated.

Camera traps provide abundant data for estimating animal activity patterns. Continuous-time spatial capture-recapture (CT SCR) models reveal that jaguars are most active near trails during twilight hours, with sex-based behavioral differences observed.

Keywords:
activity patternsbehavioral ecologycontinuous‐time spatial capture–recapturespatial capture–recapturetemporal partitioning

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Area of Science:

  • Behavioral ecology
  • Wildlife population monitoring
  • Conservation biology

Background:

  • Estimating animal activity patterns is crucial in behavioral ecology, but historically challenging for elusive species.
  • Advancements in camera trap technology have generated vast datasets for analyzing animal behavior.
  • Traditional capture-recapture models have limitations in capturing fine-scale temporal activity.

Purpose of the Study:

  • To apply continuous-time spatial capture-recapture (CT SCR) models to quantify jaguar daily activity patterns.
  • To explore space-time interactions in animal behavior using a flexible modeling framework.
  • To investigate potential sex-based differences in jaguar activity and movement.

Main Methods:

  • Utilized continuous-time spatial capture-recapture (CT SCR) models, which incorporate actual capture times rather than discrete occasions.
  • Employed cyclic splines to flexibly model cyclic activity patterns.
  • Integrated distance sampling within the SCR framework to analyze space-time interactions.

Main Results:

  • Jaguars in Belize exhibit peak activity and greatest range during evening and early morning hours.
  • Jaguar activity and movement are more pronounced closer to established trail networks.
  • Preliminary evidence suggests females may display less variable activity patterns compared to males.

Conclusions:

  • CT SCR models offer a robust framework for estimating density and exploring complex space-time behavioral dynamics.
  • The study successfully characterized jaguar activity patterns, highlighting temporal and spatial influences.
  • The findings demonstrate the utility of CT SCR models for investigating hypotheses about animal behavior and informing conservation strategies.