Providing Integrated Total Catch Advice for the Management of Mixed Fisheries with an Eco-viability Approach

Type Article
Date 2020-06
Language English
Author(s) Briton FlorenceORCID1, Macher ClaireORCID1, Merzereaud Mathieu1, Legrand Christelle1, Fifas Spyros2, Thebaud OlivierORCID1
Affiliation(s) 1 : Ifremer, Univ Brest, CNRS, UMR 6308, AMURE, Unité d’Economie Maritime, IUEM, 29280, Plouzané, France
2 : Ifremer, Unité Sciences et Technologies Halieutiques, Brest, France
Source Environmental Modeling & Assessment (1420-2026) (Springer), 2020-06 , Vol. 25 , N. 3 , P. 307-325
DOI 10.1007/s10666-019-09685-7
Keyword(s) Eco-viability, Mixed fisheries management, Bio-economic modelling, Integrated TAC advice
Abstract

Well-established single-species approaches are not adapted to the management of mixed fisheries where multiple species are simultaneously caught in unselective fishing operations. In particular, ignoring joint production when setting total allowable catches (TACs) for individual species is likely to lead to over-quota discards or, when discards are not allowed, to lost fishing opportunities. Furthermore, economic and social objectives have been poorly addressed in the design of fisheries harvest strategies, despite being an explicit objective of ecosystem-based fisheries management in many jurisdictions worldwide. We introduce the notion of operating space as the ensemble of reachable, single-species fishing mortality targets, given joint production in a mixed fishery. We then use the concept of eco-viability to identify TAC combinations which simultaneously account for multiple objectives. The approach is applied to the joint management of hake and sole fishing in the Bay of Biscay, also accounting for catches of Norway lobster, European seabass and anglerfish. Results show that fishing at the upper end of the MSY range for sole and slightly above Fmsy for hake can generate gains in terms of long-term economic viability of the fleets without impeding the biological viability of the stocks, nor the incentives for crews to remain in the fishery.We also identify reachable fishing mortality targets in the MSY ranges for these two species, given existing technical interactions.

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How to cite 

Briton Florence, Macher Claire, Merzereaud Mathieu, Legrand Christelle, Fifas Spyros, Thebaud Olivier (2020). Providing Integrated Total Catch Advice for the Management of Mixed Fisheries with an Eco-viability Approach. Environmental Modeling & Assessment, 25(3), 307-325. Publisher's official version : https://doi.org/10.1007/s10666-019-09685-7 , Open Access version : https://archimer.ifremer.fr/doc/00624/73614/