challenging because achieving the objective for one species may mean missing the objective for another. The North Sea mixed fisheries are a representative example of an issue that is generic across most demersal fisheries worldwide, with the diversity of species and fisheries inducing numerous biological and technical interactions. Building on a rich knowledge base for the understanding and quantification of these interactions, new approaches have emerged. Recent paths towards operationalizing MSY at the regional scale have suggested the expansion of the concept into a desirable area of “pretty good yield”, implemented through a range around FMSY that would allow for more flexibility in management targets. This article investigates the potential of FMSY ranges to combine long-term single-stock targets with flexible, short-term, mixed-fisheries management requirements applied to the main North Sea demersal stocks. It is shown that sustained fishing at the upper bound of the range may lead to unacceptable risks when technical interactions occur. An objective method is suggested that provides an optimal set of fishing mortality within the range, minimizing the risk of total allowable catch mismatches among stocks captured within mixed fisheries, and addressing explicitly the trade-offs between the most and least productive stocks.">
Achieving maximum sustainable yield in mixed fisheries: a management approach for the North Sea demersal fisheries
Subject: landing obligation | choke species | FMSY ranges | Common Fisheries Policy | management plan | pretty good yield | fleet modelling
Achieving single species maximum sustainable yield (MSY) in complex and dynamic fisheries targeting multiple species (mixed fisheries) is<br/>challenging because achieving the objective for one species may mean missing the objective for another. The North Sea mixed fish...
Bannister, R. C. A. 2004. The Rise and Fall of Cod (Gadus morhua, L.) in the North Sea. In Management of Shared Fish Stocks, pp. 316-338. Ed. by A. I. L. Payne, C. M. O‟Brien, and S. I. Rogers. Blackwell Publishing Ltd, Oxford, UK.
Batsleer, J., Hamon, K. G., Overzee, H. M. J. van, Rijnsdorp, A. D., and Poos, J. J. 2015. Highgrading and over-quota discarding in mixed fisheries. Rev Fish Biol Fisheries, 25: 15-736.
Borges, L. 2015. The evolution of a discard policy in Europe. Fish and Fisheries, 16: 534-540.
EU. 2014. Task Force on multiannual plans. Final report April 2014. 14 pp. http://www.europarl.europa.eu/meetdocs/2009_2014/documents/pech/dv/taskfor/taskforce.pdf.
Fulton, E. a., Smith, A. D. M., Smith, D. C., and Van Putten, I. E. 2011. Human behaviour: The key source of uncertainty in fisheries management. Fish and Fisheries, 12: 2-17.
Gillis, D. M., Pikitch, E. K., and Peterman, R. M. 1995. Dynamic discarding decisions : foraging theory for high-grading in a trawl fishery. Behavioral Ecology, 6: 146-154.
Gourguet, S., Thébaud, O., Jennings, S., Little, L. R., Dichmont, C. M., Pascoe, S., Deng, R., et al. 2015. The Cost of Co-viability in the Australian Northern Prawn Fishery. Environmental Modeling & Assessment: 1-19.
Guillen, J., Macher, C., Merzéréaud, M., Bertignac, M., Fifas, S., and Guyader, O. 2013. Estimating MSY and MEY in multi-species and multi-fleet fisheries, consequences and limits: An application to the Bay of Biscay mixed fishery. Marine Policy, 40: 64-74.
Hilborn, R. 2010. Pretty Good Yield and exploited fishes. Marine Policy, 34: 193-196.
Hilborn, R., Fulton, E. A., Green, B. S., Hartmann, K., Tracey, S. R., and Watson, R. A. 2015. When is a fishery sustainable? Canadian Journal of Fisheries and Aquatic Sciences, 72: 1433-1441.