Connectivity between two fishing sites can lead to an emergence phenomenon related to Maximum Sustainable Yield.

Autor: Nguyen-Ngoc D; College of Engineering and Computer Science, and Center for Environmental Intelligence, Vin University, Viet Nam; IRD, Sorbonne Université, Unité de Modélisation Mathématique et Informatique des Systèmes Complexes, UMMISCO, F-93143, Bondy, France. Electronic address: doanh.nn@vinuni.edu.vn., Nguyen-Huu T; IRD, Sorbonne Université, Unité de Modélisation Mathématique et Informatique des Systèmes Complexes, UMMISCO, F-93143, Bondy, France; IXXI, ENS Lyon, 46 allée d'Italie, 69007 Lyon, France., Auger P; IRD, Sorbonne Université, Unité de Modélisation Mathématique et Informatique des Systèmes Complexes, UMMISCO, F-93143, Bondy, France.
Jazyk: angličtina
Zdroj: Journal of theoretical biology [J Theor Biol] 2024 Dec 07; Vol. 595, pp. 111913. Date of Electronic Publication: 2024 Sep 05.
DOI: 10.1016/j.jtbi.2024.111913
Abstrakt: In this study, we examine the effects of connectivity on the total catch of a fishery consisting of two fishing sites when the fish population is a predator of a larger prey-predator system. To this end, we analyze a prey-predator fish community model in a two-site environment and compute catch at Maximum Sustainable Yield (MSY). We exhibit some emergence phenomenon: the total catch can be greater than the sum of the catch at two isolated sites due to connectivity. This result is obtained when the two sites are heterogeneous. We show that the increase in capture at MSY is maximal for a certain value of the carrying capacity of the second site, all other parameters remaining constant, including the carrying capacity of the first site. A stronger phenomenon can also be observed: even if none of the sites is viable for fishing, the entire system can be viable. We then study the effects of the heterogeneity of the sites and illustrate our results through simulations. It is shown that the excess yield at MSY can become very significant when the characteristics of the prey and predator in terms of potential growth are opposite at each site.
Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Doanh Nguyen-Ngoc reports financial support, administrative support, and article publishing charges were provided by Vin University. Tri Nguyen-Huu reports financial support and administrative support were provided by French National Research Institute for Sustainable Development. If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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