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Wolves contribute to disease control in a multi-host system.

E Tanner1, A White2, P Acevedo3

  • 1Maxwell Institute for Mathematical Sciences, Department of Mathematics, Heriot-Watt University, Edinburgh, EH14 4AS, UK. ent1@hw.ac.uk.

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Predation by wolves (Canis lupus) on wild boar (Sus scrofa) can reduce tuberculosis prevalence. This predation regulates host density, offering an ecosystem service for disease control in wildlife.

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Area of Science:

  • Ecology
  • Wildlife Disease Ecology
  • Conservation Biology

Background:

  • Wild boar (Sus scrofa) act as a wildlife reservoir for tuberculosis.
  • Understanding disease dynamics in multi-host systems is crucial for effective management.
  • The role of predation in regulating disease spread is often underestimated.

Purpose of the Study:

  • To investigate how wolf (Canis lupus) predation influences tuberculosis prevalence in wild boar populations.
  • To assess the impact of predation on host population density and disease-induced mortality.
  • To determine if predation can serve as a disease control mechanism in multi-host wildlife systems.

Main Methods:

  • Combined ecological modeling with field data analysis.
  • Studied a predator-prey system involving wolves and wild boar.
  • Quantified infection prevalence, host density, and mortality rates.

Main Results:

  • Wolf predation significantly reduced tuberculosis prevalence in wild boar.
  • Predation mortality was compensated by reduced disease-induced mortality, maintaining host population density.
  • Wildlife populations with virulent infections can be regulated by disease or predation.

Conclusions:

  • Predation by wolves can be a vital ecosystem service for controlling wildlife diseases like tuberculosis.
  • Recognizing the role of predators is essential for managing human-carnivore conflicts.
  • Conservation and re-establishment of carnivore populations can contribute to disease regulation.