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  The dynamic effects of an inducible defense in the Nicholson-Bailey model

Kopp, M., & Gabriel, W. (2006). The dynamic effects of an inducible defense in the Nicholson-Bailey model. Theoretical Population Biology, 70(1), 43-55. doi:10.1016/j.tpb.2005.11.002.

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 Urheber:
Kopp, Michael1, Autor           
Gabriel, Wilfried1, Autor           
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1Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976547              

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Schlagwörter: benefits; costs; cycles; hysteresis; inducible defense; multiple equilibria; Nicholson-Bailey model; phenotypic plasticity; predator-prey; stability
 Zusammenfassung: We investigate the dynamic effects of an inducible prey defense in the Nicholson-Bailey predator-prey model. We assume that the defense is of all-or-nothing type but that the probability for a prey individual to express the defended phenotype increases gradually with predator density. Compared to a defense that is independent of predation risk, an inducible defense facilitates persistence of the predator-prey system. In particular, inducibility reduces the minimal strength of the defense required for persistence. It also promotes stability by damping predator-prey cycles, but there are exceptions to this result: first, a strong inducible defense leads to the existence of multiple equilibria, and sometimes, to the destruction of stable equilibria. Second, a fast increase in the proportion of defended prey can create predator-prey cycles as the result of an over-compensating negative feedback. Non-equilibrium dynamics of the model are extremely complex.

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Sprache(n): eng - English
 Datum: 2006-08
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
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 Identifikatoren: eDoc: 284799
DOI: 10.1016/j.tpb.2005.11.002
Anderer: 2467/S 38496
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Titel: Theoretical Population Biology
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 70 (1) Artikelnummer: - Start- / Endseite: 43 - 55 Identifikator: ISSN: 0040-5809