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A Real-Time Interactive System for Studying Confrontational Pursuit Behavior in Rodents

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How linear features alter predator movement and the functional response.

Hannah W McKenzie¹, Evelyn H Merrill, Raymond J Spiteri

¹Centre for Mathematical Biology, Department of Mathematical and Statistical Sciences, 632 CAB, University of Alberta, Edmonton, Alberta, Canada T6G 2G1.

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|March 16, 2012

Summary

This summary is machine-generated.

Seismic lines from oil and gas exploration alter wolf movement, increasing predator-prey encounters. This risk is highest for prey at low population densities in high seismic line areas.

Keywords:

encounter rate mean first passage time seismic lines spatial heterogeneity wolf movement

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Area of Science:

Ecology
Wildlife Biology
Conservation Science

Background:

Seismic lines are linear disturbances created during oil and gas exploration.
Previous studies suggest seismic lines impact large mammal movement patterns.
Wolf (Canis lupus) movement and predator-prey dynamics are crucial for ecosystem health.

Purpose of the Study:

To model how wolf movement responses to seismic lines affect prey encounter rates.
To investigate the influence of seismic line density on predator-prey interactions.
To understand the implications for functional response in wolf populations.

Main Methods:

Developed a mechanistic first passage time model based on an anisotropic elliptic partial differential equation.
Utilized 5-minute GPS location data of wolves for model parametrization.
Simulated wolf movement across various seismic line densities to assess encounter rates.

Main Results:

Wolves exhibited faster travel speeds and higher site fidelity on seismic lines.
Encounter rates between wolves and prey increased significantly with higher seismic line densities.
The functional response showed a type III pattern, with interactions between prey and seismic line densities.

Conclusions:

High seismic line density elevates the risk of predator-prey encounters, particularly for low-density prey populations.
Seismic lines can alter predator-prey dynamics, potentially impacting prey survival.
Conservation strategies may need to consider the effects of seismic lines on wildlife interactions.