Revealing the role of predator interference in a predator–prey system with disease in prey population

S. Chakraborty, B.W. Kooi, A. Biswas, P. Chattopadhyay

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Predation on a species subjected to an infectious disease can affect both the infection level and the population dynamics. There is an ongoing debate about the act of managing disease in natural populations through predation. Recent theoretical and empirical evidence shows that predation on infected populations can have both positive and negative influences on disease in prey populations. Here, we present a predator-prey system where the prey population is subjected to an infectious disease to explore the impact of predator on disease dynamics. Specifically, we investigate how the interference among predators affects the dynamics and structure of the predator-prey community. We perform a detailed numerical bifurcation analysis and find an unusually large variety of complex dynamics, such as, bistability, torus and chaos, in the presence of predators. We show that, depending on the strength of interference among predators, predators enhance or control disease outbreaks and population persistence. Moreover, the presence of multistable regimes makes the system very sensitive to perturbations and facilitates a number of regime shifts. Since, the habitat structure and the choice of predators deeply influence the interference among predators, thus before applying predators to control disease in prey populations or applying predator control strategy for wildlife management, it is essential to carefully investigate how these predators interact with each other in that specific habitat; otherwise it may lead to ecological disaster.
Original languageEnglish
Pages (from-to)100-110
JournalEcological Complexity
Volume21
Early online date22 Nov 2014
DOIs
Publication statusPublished - 2015

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predator
predators
disease control
predation
infectious disease
infectious diseases
predator control
wildlife management
habitat structure
disasters
chaotic dynamics
bifurcation
habitats
disaster
population dynamics
persistence
perturbation
habitat
infection

Cite this

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title = "Revealing the role of predator interference in a predator–prey system with disease in prey population",
abstract = "Predation on a species subjected to an infectious disease can affect both the infection level and the population dynamics. There is an ongoing debate about the act of managing disease in natural populations through predation. Recent theoretical and empirical evidence shows that predation on infected populations can have both positive and negative influences on disease in prey populations. Here, we present a predator-prey system where the prey population is subjected to an infectious disease to explore the impact of predator on disease dynamics. Specifically, we investigate how the interference among predators affects the dynamics and structure of the predator-prey community. We perform a detailed numerical bifurcation analysis and find an unusually large variety of complex dynamics, such as, bistability, torus and chaos, in the presence of predators. We show that, depending on the strength of interference among predators, predators enhance or control disease outbreaks and population persistence. Moreover, the presence of multistable regimes makes the system very sensitive to perturbations and facilitates a number of regime shifts. Since, the habitat structure and the choice of predators deeply influence the interference among predators, thus before applying predators to control disease in prey populations or applying predator control strategy for wildlife management, it is essential to carefully investigate how these predators interact with each other in that specific habitat; otherwise it may lead to ecological disaster.",
author = "S. Chakraborty and B.W. Kooi and A. Biswas and P. Chattopadhyay",
year = "2015",
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language = "English",
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journal = "Ecological Complexity",
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Revealing the role of predator interference in a predator–prey system with disease in prey population. / Chakraborty, S.; Kooi, B.W.; Biswas, A.; Chattopadhyay, P.

In: Ecological Complexity, Vol. 21, 2015, p. 100-110.

Research output: Contribution to JournalArticleAcademicpeer-review

TY - JOUR

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AU - Kooi, B.W.

AU - Biswas, A.

AU - Chattopadhyay, P.

PY - 2015

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AB - Predation on a species subjected to an infectious disease can affect both the infection level and the population dynamics. There is an ongoing debate about the act of managing disease in natural populations through predation. Recent theoretical and empirical evidence shows that predation on infected populations can have both positive and negative influences on disease in prey populations. Here, we present a predator-prey system where the prey population is subjected to an infectious disease to explore the impact of predator on disease dynamics. Specifically, we investigate how the interference among predators affects the dynamics and structure of the predator-prey community. We perform a detailed numerical bifurcation analysis and find an unusually large variety of complex dynamics, such as, bistability, torus and chaos, in the presence of predators. We show that, depending on the strength of interference among predators, predators enhance or control disease outbreaks and population persistence. Moreover, the presence of multistable regimes makes the system very sensitive to perturbations and facilitates a number of regime shifts. Since, the habitat structure and the choice of predators deeply influence the interference among predators, thus before applying predators to control disease in prey populations or applying predator control strategy for wildlife management, it is essential to carefully investigate how these predators interact with each other in that specific habitat; otherwise it may lead to ecological disaster.

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