Journal
THEORETICAL POPULATION BIOLOGY
Volume 66, Issue 3, Pages 259-268Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.tpb.2004.06.010
Keywords
predator; prey; SIS; disease; equilibrium; stability
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A predator-prey model with logistic growth in the prey is modified to include an SIS parasitic infection in the prey with infected prey being more vulnerable to predation. Thresholds are identified which determine when the predator population survives and when the disease remains endemic. For some parameter values the greater vulnerability of the infected prey allows the predator population to persist, when it would otherwise become extinct. Also the predation on the more vulnerable prey can cause the disease to die out, when it would remain endemic without the predators. (C) 2004 Elsevier Inc. All rights reserved.
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