Adaptive threshold harvesting and the suppression of transients

Autor(en): Segura, Juan
Hilker, Frank M.
Franco, Daniel
Stichwörter: Adaptive limiter control; Biology; CONTROLLING CHAOS; DYNAMICS; EXTINCTION; IMMIGRATION; Life Sciences & Biomedicine - Other Topics; MAPS; Mathematical & Computational Biology; METAPOPULATIONS; Population size fluctuations; POPULATIONS; SENSITIVITY; Short-term yield; STABILITY; Stabilization; STRATEGIES; Transient cancellation
Erscheinungsdatum: 2016
Herausgeber: ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Journal: JOURNAL OF THEORETICAL BIOLOGY
Volumen: 395
Startseite: 103
Seitenende: 114
Zusammenfassung: 
Fluctuations in population size are in many cases undesirable, as they can induce outbreaks and extinctions or impede the optimal management of populations. We propose the strategy of adaptive threshold harvesting (ATH) to control fluctuations in population size. In this strategy, the population is harvested whenever population size has grown beyond a certain proportion in comparison to the previous generation. Taking such population increases into account, ATH intervenes also at smaller population sizes than the strategy of threshold harvesting. Moreover, ATH is the harvesting version of adaptive limiter control (ALC) that has recently been shown to stabilize population oscillations in both experiments and theoretical studies. We find that ATH has similar stabilization properties as ALC and thus offers itself as a harvesting alternative for the control of pests, exploitation of biological resources, or when restocking interventions required from ALC are unfeasible. We present numerical simulations of ATH to illustrate its performance in the presence of noise, lattice effect, and Allee effect. In addition, we propose an adjustment to both ATH and ALC that restricts interventions when control seems unnecessary, i.e. when population size is too small or too large, respectively. This adjustment cancels prolonged transients. (C) 2016 Elsevier Ltd. All rights reserved.
ISSN: 00225193
DOI: 10.1016/j.jtbi.2016.01.039

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