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Sustainable strategies for harvesting predators and prey in a fluctuating environment

Permanent lenke
https://hdl.handle.net/10037/24588
DOI
https://doi.org/10.1016/j.ecolmodel.2020.109350
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article.pdf (2.320Mb)
Publisert versjon (PDF)
Dato
2020-11-12
Type
Journal article
Tidsskriftartikkel
Peer reviewed
Forfatter
Bellier, Edwige; Sæther, Bernt-Erik; Engen, Steinar
Sammendrag
The effects of harvest and fluctuating environment on inter-dependent predators and prey are complex and not well-known. We define a stochastic model where the predators and prey dynamically interact. The novelty of the model holds on the fact that predators and prey dynamics are simultaneously affected by correlated environmental noises. Interacting predators and prey are harvested using a proportional threshold harvesting strategy that accounts for stochastic population dynamics. Optimal yield of prey can be obtained with identical harvesting strategies when the predators and prey responded to the environment similarly (i.e., synchrony between species) and differently (i.e., asynchrony between species). Remarkably, our study demonstrates that two different harvesting strategies, the proportional harvesting strategy for the prey and the proportional threshold harvesting strategy for the predators, are needed to optimize the annual yield of predators and prey when both species are harvested simultaneously. Our study finds optimal strategies for harvesting interacting species affected by environmental variations (i.e., correlated noises) with parameters representing the joint dynamics of predators and prey at a stable state.
Forlag
Elsevier
Sitering
Bellier, Sæther, Engen. Sustainable strategies for harvesting predators and prey in a fluctuating environment. Ecological Modelling. 2021;440:1-12
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  • Artikler, rapporter og annet (arktisk og marin biologi) [1632]
Copyright 2021 The Author(s)

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