Maximum Economic Yield Fishery Management in the Face of Global Warming

Type Article
Date 2018-12
Language English
Author(s) Diop Bassirou1, Sanz Nicolas2, Junior Duplan Yves Jamont3, Guene El Hadji Mama4, Blanchard FabianORCID5, Pereau Jean-Christophe6, Doyen Luc6
Affiliation(s) 1 : CNRS French Natl Ctr Sci Res, LEEISA, UMRS 3456, BP 477, Cayenne 9733, French Guiana.
2 : Univ French Guiana, UMRS 3456, LEEISA, Campus Troubiran,BP 20792, Cayenne 97337, French Guiana.
3 : Univ French Guiana, Campus Troubiran,BP 20792, Cayenne 97337, French Guiana.
4 : IPR, Rennes, France.
5 : Ifremer French Res Inst Exploitat Sea, LEEISA, UMRS 3456, BP 477, Cayenne 97331, French Guiana.
6 : Univ Bordeaux, GREThA CNRS French Natl Ctr Sci Res, Ave Leon Duguit, F-33608 Pessac, France.
Source Ecological Economics (0921-8009) (Elsevier Science Bv), 2018-12 , Vol. 154 , P. 52-61
DOI 10.1016/j.ecolecon.2018.07.027
WOS© Times Cited 4
Keyword(s) Renewable resources, Fishery bioeconomic model, Climate change, Climate scenarios, Adaptation, Shrimp
Abstract

This paper deals with fishery management in the face of the ecological and economic effects of global warming. To achieve this, a dynamic bioeconomic model and model-based scenarios are considered, in which the stock's growth function depends on the sea surface temperature. The model is empirically calibrated for the French Guiana shrimp fishery using time series collected over the period 1993–2009. Three fishing effort strategies are then compared under two contrasted IPCC climate scenarios (RCP 8.5 and RCP 2.6). A first harvesting strategy maintains the Status Quo in terms of fishing effort. A more ecologically-oriented strategy based on the closure of the fishery is also considered. A third strategy, which relates to Maximum Economic Yield (MEY), is based on the optimisation of the net present value derived from fishing. The results first show that ‘Status Quo’ fishing intensity combined with global warming leads to the collapse of the fishery in the long run. Secondly, it turns out that the Closure strategy preserves stock viability especially under the optimistic climate scenario. Thirdly, the MEY strategy makes it possible to satisfy bioeconomic performances requirements with positive stock and profit, once again, especially under the optimistic warming scenario. Consequently, MEY emerges as a relevant bioeconomic strategy in terms of adaptation to climate change but only in connection with climate change mitigation.

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