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Fish eradication in freshwater ecosystems by repeated fishing.
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SYSNO ASEP 0562963 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Fish eradication in freshwater ecosystems by repeated fishing. Author(s) Martínez, Carlos (BC-A) RID, ORCID
Souza, Allan T. (BC-A) RID, ORCID
Kubečka, Jan (BC-A) RID, ORCIDNumber of authors 3 Source Title IFAC-PapersOnLine - ISSN 2405-8971
Roč. 55, č. 20 (2022), s. 659-664Number of pages 6 s. Publication form Online - E Language eng - English Country NL - Netherlands Keywords Dynamics and control ; Biomanipulation ; Fish removal ; Impulsive differential equation Subject RIV EH - Ecology, Behaviour OECD category Ecology R&D Projects EF18_053/0016982 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_025/0007417 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support BC-A - RVO:60077344 UT WOS 000860842100111 EID SCOPUS 85142212864 DOI 10.1016/j.ifacol.2022.09.171 Annotation The removal of planktivorous fish results in ecosystem changes that increase water transparency and decrease the risk of harmful algal blooms. In many situations, complete eradication of fish is necessary to improve water quality, which can also protect natural populations. In this work, we construct a generic fish-zooplankton (FZ) model and we determine conditions to eradicate the fish population through repeated fish removal. The model accounts for the weight and age of fish, and is described by a system of ordinary differential equations with impulsive effects representing the reproduction process and fish removal. We demonstrate that the survival and extinction of fish can be determined from the roots of a polynomial, whose coefficients depend on maximal fecundity, mortality rates, and catching effort. If all roots of the polynomial lie within the unit circle, then eradication is ensured. To illustrate our results, we show the importance of removing young fish, and not only adults, to achieve eradication. Copyright (C) 2022 The Authors. Workplace Biology Centre (since 2006) Contact Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Year of Publishing 2023 Electronic address https://doi.org/10.1016/j.ifacol.2022.09.171
Number of the records: 1