Food Subsidy Effects on Host Foraging Behavior Shape Host-Macroparasite Infection Dynamics

Area of Science:

• Ecology
• Parasitology
• Wildlife Management

Background:

• Anthropogenic food subsidies alter wildlife behavior and health, influencing parasite exposure.
• Foraging behavior is often linked to parasite exposure in host-macroparasite systems.
• The impact of food subsidy distribution on parasite encounter rates and population effects is not well understood.

Purpose of the Study:

• To model how food subsidies affect macroparasite transmission dynamics.
• To investigate the influence of subsidy distribution on parasite encounter rates and host parasite burdens.
• To assess the population-level consequences of altered parasite exposure due to food subsidies.

Main Methods:

• Mathematical modeling of macroparasite transmission.
• Simulation of host foraging behavior in response to different food subsidy scenarios.
• Analysis of parasite encounter rates, host parasite burdens, and population size.

Main Results:

• Highest average parasite abundance and population reduction occurred with homogenized parasite encounter rates from concentrated subsidies.
• Lowest parasite abundance and impacts resulted from heterogeneous encounter rates due to dispersed subsidies.
• Changes in parasite encounter rates driven by foraging behavior were the primary factor influencing infection, overriding other resource effects.

Conclusions:

• Food subsidy distribution critically influences wildlife parasite dynamics.
• Concentrated subsidies can lead to increased parasite exposure and negative population impacts.
• Understanding foraging-driven infection dynamics is crucial for wildlife management and conservation efforts involving food provisioning.