Prey dynamics under generalist predator culling in stage structured models

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• 作者：Michel Iskin da S. Costa^a ; ^{michel@lncc.br} ; Pedro.V. Esteves^b ; ^{pedrovesteves@gmail.com} ; Lucas Del Bianco Faria^c ; ^{lucasdbf@gmail.com} ; ^{lucas.ecol@gmail.com} ; Lucas dos Anjos^a ; ^{lanjos@lncc.br}
• 关键词：Stage dependent predation ; Functional response ; Alternative stable states ; Unstable limit cycle ; Hydra effect
• 刊名：Mathematical Biosciences
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：285
• 期：Complete
• 页码：68-74
• 全文大小：1021 K
• 卷排序：285

文摘

In this paper, by means of mathematical dynamical models we investigate the impacts of predator culling on a prey population structured in two stage classes, juveniles and adults, assuming stage specific predation by two generalist predators with functional responses types 2 and 3 in all possible combinations. According to the chosen set of parameter values, these impacts can manifest through possible demographic Allee effects, sustained population oscillations, alternative stable states (e.g., predator-pit-like behavior) and Hydra effect, which are all discussed, in turn, in terms of species conservation, harvest yield and pest biological control