Alternative food, switching predators, and the persistence of predator-prey systems

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F01%3A00003163" target="_blank" >RIV/60076658:12310/01:00003163 - isvavai.cz</a>

Alternative codes found

RIV/60077395:_____/01:60010015

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Alternative food, switching predators, and the persistence of predator-prey systems

Original language description

Sigmoid functional responses may arise from a variety of mechanisms, one of which is switching to alternative food sources. It has long been known that sigmoid (Holling's Type III) functional responses may stabilize an otherwise unstable equilibrium of prey and predators in Lotka-Volterra models. This poses the question of under what conditions such switching-mediated stability is likely to occur. A more complete understanding of the effect of predator switching would therefore require the analysis ofone-predator/two-prey models, but these are difficult to analyze. We studied a model based on the simplifying assumption that the alternative food source has a fixed density. A well-known result from optimal foraging theory is that when prey density dro psbelow a threshold density, optimally foraging predators will switch to alternative food, either by including the alternative food in their diet (in a fine-grained environment) or by moving to the alternative food source (in a coarse-grai

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

EH - Ecology - communities

OECD FORD branch

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Project

<a href="/en/project/GA201%2F98%2F0227" target="_blank" >GA201/98/0227: Mathematical methods of theoretical population biology</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2001

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

The American Naturalist

ISSN

0003-0147

e-ISSN

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Volume of the periodical

157

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

13

Pages from-to

512-524

UT code for WoS article

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EID of the result in the Scopus database

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