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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

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  • Guillen, Jordi
  • Macher, Claire
  • Merzéréaud, Mathieu
  • Fifas, Spyros
  • Guyader, Olivier

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.

Suggested Citation

  • Guillen, Jordi & Macher, Claire & Merzéréaud, 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, Elsevier, vol. 50(PA), pages 207-214.
    • Handle: RePEc:eee:marpol:v:50:y:2014:i:pa:p:207-214
    DOI: 10.1016/j.marpol.2014.06.005
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    References listed on IDEAS

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    1. Claire Macher & Olivier Guyader & Catherine Talidec & M. Bertignac, 2008. "A cost–benefit analysis of improving trawl selectivity in the case of discards: The Nephrops norvegicus fishery in the Bay of Biscay," Post-Print hal-00359860, HAL.
    2. Asche, Frank & Guillen, Jordi, 2012. "The importance of fishing method, gear and origin: The Spanish hake market," Marine Policy, Elsevier, vol. 36(2), pages 365-369.
    3. Adriana Raveau & Claire Macher & Sonia Mehault & Mathieu Merzereaud & Christelle Le Grand & Olivier Guyader & M. Bertignac & S. Fifas & Jordi Guillen, 2012. "A bio-economic analysis of experimental selective devices in the Norway lobster (Nephrops norvegicus) fishery in the Bay of Biscay," Post-Print hal-00815492, HAL.
    4. Daw, Tim & Gray, Tim, 2005. "Fisheries science and sustainability in international policy: a study of failure in the European Union's Common Fisheries Policy," Marine Policy, Elsevier, vol. 29(3), pages 189-197, May.
    5. Catchpole, T.L. & Frid, C.L.J. & Gray, T.S., 2005. "Discards in North Sea fisheries: causes, consequences and solutions," Marine Policy, Elsevier, vol. 29(5), pages 421-430, September.
    6. Claire Macher & Jean Boncoeur, 2010. "Optimal selectivity and effort cost: A simple bioeconomic model with an application to the Bay of Biscay Nephrops fishery," Post-Print hal-00511667, HAL.
    7. Cardinale, Massimiliano & Hjelm, Joakim, 2012. "Size matters: Short term loss and long term gain in a size-selective fishery," Marine Policy, Elsevier, vol. 36(4), pages 903-906.
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    1. Jordi Guillen & Steven J. Holmes & Natacha Carvalho & John Casey & Hendrik Dörner & Maurizio Gibin & Alessandro Mannini & Paraskevas Vasilakopoulos & Antonella Zanzi, 2018. "A Review of the European Union Landing Obligation Focusing on Its Implications for Fisheries and the Environment," Sustainability, MDPI, vol. 10(4), pages 1-12, March.
    2. Jordi Guillen & Claire Macher & Mathieu Merzéréaud & Jean Boncoeur & Olivier Guyader, 2015. "Effects of the Share Remuneration System on Fisheries Management Targets and Rent Distribution," Marine Resource Economics, University of Chicago Press, vol. 30(2), pages 123-138.

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