The effect of management choices on the sustainability and economic performance of a mixed fishery: a simulation study
1 Wageningen IMARES (Institute for Marine Resources and Ecosystem Studies), PO Box 68, 1970 AB IJmuiden, The Netherlands
2 Agricultural Economics Research Institute (LEI), PO Box 29703, 2502 LS Den Haag, The Netherlands
Correspondence to S. B. M. Kraak: tel: +31 (0)317 487177; fax: +31 (0)317 487326; e-mail: sarah.kraak{at}wur.nl
Kraak, S. B. M., Buisman, F. C., Dickey-Collas, M., Poos, J. J., Pastoors, M. A., Smit, J. G. P., van Oostenbrugge, J. A. E., and Daan, N. 2008. The effect of management choices on the sustainability and economic performance of a mixed fishery: a simulation study. – ICES Journal of Marine Science, 65: 697–712.Alternative management scenarios were evaluated in a simulation framework that mimicked the recent exploitation of sole and plaice in the North Sea. A large proportion of plaice is taken as bycatch of the beam trawl fleet targeting sole, yet current management of the two stocks assumes no interaction in their exploitation. The evaluation criteria included biological and economic sustainability, and stability in the management measures. The fishery was assumed to respond to management restrictions by dropping the least profitable trips. We investigated two contrasting management strategies, single-species total allowable catches, and effort regulation. Under the assumptions made, the latter strategy performed better. The results suggest that, given assessment error and bias, a strategy that accounts for the mixed nature of a fishery and that occasionally results in perceived underexploitation may work best. Stability in fishing mortality reinforces itself, through lower assessment bias, and management corrections become less frequent. The common assumption in many stock assessments in EC waters that fishing mortality in the most recent year should resemble the value obtained in previous years ("shrinkage") had a negative effect on the stability of control measures.
Keywords: economic performance, effort regulation, management strategy evaluation, mixed fishery, North Sea plaice, North Sea sole
Received 14 December 2006; accepted 20 February 2008; advance access publication 20 March 2008.
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  S. B. M. Kraak, N. Daan, and M. A. Pastoors Biased stock assessment when using multiple, hardly overlapping, tuning series if fishing trends vary spatially ICES J. Mar. Sci., December 1, 2009; 66(10): 2272 - 2277. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
F. Bastardie, J. R. Nielsen, and G. Kraus The eastern Baltic cod fishery: a fleet-based management strategy evaluation framework to assess the cod recovery plan of 2008 ICES J. Mar. Sci., September 16, 2009; (2009) fsp228v1. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. M. Pilling, L. T. Kell, T. Hutton, P. J. Bromley, A. N. Tidd, and L. J. Bolle Can economic and biological management objectives be achieved by the use of MSY-based reference points? A North Sea plaice (Pleuronectes platessa) and sole (Solea solea) case study ICES J. Mar. Sci., September 1, 2008; 65(6): 1069 - 1080. [Abstract] [Full Text] [PDF]
|
|