Flexibility of joint production in mixed fisheries and implications for management

Type Article
Date 2021-08
Language English
Author(s) Briton Florence1, 2, 3, Thebaud OlivierORCID1, Macher ClaireORCID1, Gardner Caleb4, Richard Little Lorne3, 5
Affiliation(s) 1 : Ifremer, Universite de Bretagne Occidentale, CNRS, UMR 6308, AMURE, Unite d’Economie Maritime, IUEM, F-29280 Plouzane´, France
2 : CSIRO-UTAS Quantitative Marine Sciences PhD Program, Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia
3 : Centre for Marine Socioecology, University of Tasmania, Hobart, TAS 7001, Australia
4 : Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS 7001, Australia
5 : Oceans and Atmosphere, CSIRO, Hobart, TAS, Australia
Source Ices Journal Of Marine Science (1054-3139) (Oxford University Press (OUP)), 2021-08 , Vol. 78 , N. 5 , P. 1599-1613
DOI 10.1093/icesjms/fsab057
Keyword(s) fishing behaviour, ITQ, joint production, mixed fisheries, Southern and Eastern Scalefish and Shark Fishery, TAC advice
Abstract

Over the past decade, efforts have been made to factor technical interactions into management recommendations for mixed fisheries. Yet, the dynamics underlying joint production in mixed fisheries are generally poorly captured in operational mixed fisheries models supporting total allowable catch advice. Using an integrated ecological–economic simulation model, we explore the extent to which fishers are likely to alter the species composition of their landings in a mixed fishery managed with individual transferable quotas, the Australian Southern and Eastern Scalefish and Shark Fishery. Our simulations capture three different types of joint production problems, highlighting the flexibility that exists in terms of achievable catch compositions when quota markets provide the economic incentives to adapt fishing practices to quota availability. These results highlight the importance of capturing the drivers of fishing choices when advising TAC decisions in mixed fisheries. We also identify a hierarchy of species in this fishery, with harvest targets set for primary commercial species determining most of its socio-economic performance.

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