The effect of discards and survival rate on the Maximum Sustainable Yield estimation based on landings or catches maximisation: Application to the nephrops fishery in the Bay of Biscay

Type Article
Date 2014-12
Language English
Author(s) Guillen Jordi1, 2, Macher ClaireORCID1, Merzereaud Mathieu1, Fifas Spyros3, Guyader Olivier1
Affiliation(s) 1 : IFREMER, UMR AMURE, Unite Econ Maritime, F-29280 Plouzane, France.
2 : CSIC, Inst Ciencias Mar, E-08003 Barcelona, Spain.
3 : IFREMER, Unite Sci & Technol Halieut, F-29280 Plouzane, France.
Source Marine Policy (0308-597X) (Elsevier Sci Ltd), 2014-12 , Vol. 50 , P. 207-214
DOI 10.1016/j.marpol.2014.06.005
WOS© Times Cited 7
Keyword(s) Maximum Sustainable Yield (MSY), Discards, Nephrops, Survival rate
Abstract MSY objectives are being adopted as major fisheries management targets worldwide. However, in fisheries where discards account for an important share of the catches, the yield, effort, and biomass at MSY can be significantly different when accounting or not for discards and thus when, basing the yield estimations on landings or catches. Also whether accounting for a certain survival rate, of discards can lead to different MSY targets estimates. Hence, both decisions have important, implications on catch and effort reduction recommendations, and consequently on the quota, calculations for fisheries managed by quotas. Results from the Bay of Biscay nephrops fishery confirm, that the optimal exploitation level can vary significantly when optimising for catches or landings, and, by assuming a certain survival rate of the discards. By doing this, the present study also allows to, explore the basis to clarify the definition of MSY in fisheries where discarding takes place.
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Guillen Jordi, Macher Claire, Merzereaud Mathieu, Fifas Spyros, Guyader Olivier (2014). The effect of discards and survival rate on the Maximum Sustainable Yield estimation based on landings or catches maximisation: Application to the nephrops fishery in the Bay of Biscay. Marine Policy, 50, 207-214. Publisher's official version : https://doi.org/10.1016/j.marpol.2014.06.005 , Open Access version : https://archimer.ifremer.fr/doc/00201/31180/