Stock-based vs. fleet-based evaluation of the multi-annual management plan for the cod stocks in the Baltic Sea

Stock-based vs. fleet-based evaluation of the multi-annual management plan for the cod stocks in the Baltic Sea. Bastardie, F., Vinther, M., Nielsen, J. R., Ulrich, C., & Paulsen, M. S. FISHERIES RESEARCH, 101(3):188-202, ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, JAN 15, 2010.
doi abstract bibtex

This study evaluated the EU 2008 multi-annual plan for Baltic cod stock recovery. The plan combines harvest control rules that set TACs with reductions in direct effort (E) and fishing mortality (F). Performance and robustness of the plan are tested with a management strategy evaluation model (MSE). Stochastic simulations are carried out under different scenarios of recruitment and sources of uncertainties. Under the different magnitudes of errors investigated, the plan in its current design is likely to reach precautionary targets for the Eastern and the Western Baltic cod stocks by 2015. It is, however, more sensitive to implementation errors (e.g. catch misreporting) than to observation errors (e.g. data collection) when the (i) current settings of the ICES single-stock assessment model are maintained. (ii) intended fishing effort reduction is fully complied with, and (iii) biological parameters are assumed constant. For the Eastern Baltic stock, additional sources of uncertainties from fishery adaptation to the plan are tested using a fleet-based and spatially explicit version of the model which leads to higher reductions in F and no significant change in management robustness. The relative difference between both approaches is mainly due to differences in exploitation patterns in catching the same amount of fish. The effort control is demonstrated to be more efficient when supplemented with a TAC and avoids un-intended effects from fishery responses, e.g. spatial effort reallocation. Medium term economic evaluation of fishery performance shows an initial reduction in profit with effort and TAC reductions, but profit is always positive. (C) 2009 Elsevier B.V. All rights reserved.

@article{ ISI:000273140400006,
Author = {Bastardie, Francois and Vinther, Morten and Nielsen, J. Rasmus and
   Ulrich, Clara and Paulsen, Marie Storr},
Title = {{Stock-based vs. fleet-based evaluation of the multi-annual management
   plan for the cod stocks in the Baltic Sea}},
Journal = {{FISHERIES RESEARCH}},
Year = {{2010}},
Volume = {{101}},
Number = {{3}},
Pages = {{188-202}},
Month = {{JAN 15}},
Abstract = {{This study evaluated the EU 2008 multi-annual plan for Baltic cod stock
   recovery. The plan combines harvest control rules that set TACs with
   reductions in direct effort (E) and fishing mortality (F). Performance
   and robustness of the plan are tested with a management strategy
   evaluation model (MSE). Stochastic simulations are carried out under
   different scenarios of recruitment and sources of uncertainties. Under
   the different magnitudes of errors investigated, the plan in its current
   design is likely to reach precautionary targets for the Eastern and the
   Western Baltic cod stocks by 2015. It is, however, more sensitive to
   implementation errors (e.g. catch misreporting) than to observation
   errors (e.g. data collection) when the (i) current settings of the ICES
   single-stock assessment model are maintained. (ii) intended fishing
   effort reduction is fully complied with, and (iii) biological parameters
   are assumed constant. For the Eastern Baltic stock, additional sources
   of uncertainties from fishery adaptation to the plan are tested using a
   fleet-based and spatially explicit version of the model which leads to
   higher reductions in F and no significant change in management
   robustness. The relative difference between both approaches is mainly
   due to differences in exploitation patterns in catching the same amount
   of fish. The effort control is demonstrated to be more efficient when
   supplemented with a TAC and avoids un-intended effects from fishery
   responses, e.g. spatial effort reallocation. Medium term economic
   evaluation of fishery performance shows an initial reduction in profit
   with effort and TAC reductions, but profit is always positive. (C) 2009
   Elsevier B.V. All rights reserved.}},
Publisher = {{ELSEVIER SCIENCE BV}},
Address = {{PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Bastardie, F (Reprint Author), Tech Univ Denmark, Natl Inst Aquat Resources, DK-2920 Charlottenlund, Denmark.
   Bastardie, Francois; Vinther, Morten; Nielsen, J. Rasmus; Ulrich, Clara; Paulsen, Marie Storr, Tech Univ Denmark, Natl Inst Aquat Resources, DK-2920 Charlottenlund, Denmark.}},
DOI = {{10.1016/j.fishres.2009.10.009}},
ISSN = {{0165-7836}},
Keywords = {{Baltic; Bio-economic model; Cod; Fishery library in R (FLR); Harvest
   control rules (HCR); Long-term management plan; Management strategy
   evaluation (MSE); Scenario evaluation}},
Keywords-Plus = {{NORTH-SEA; FISHERIES}},
Research-Areas = {{Fisheries}},
Web-of-Science-Categories  = {{Fisheries}},
Author-Email = {{fba@aqua.dtu.dk}},
ResearcherID-Numbers = {{Ulrich, Clara/F-3583-2011}},
Funding-Acknowledgement = {{EU {[}EU-FP6-044227, EU-FP6-022717, EU-FP6-044168]}},
Funding-Text = {{This work has been undertaken as part of the EU-FP6-044227 IMAGE
   project, through cooperation with the EU-FP6-022717 UNCOVER and
   EU-FP6-044168 AFRAME projects. The work does not necessarily reflect
   their views and in no way anticipates the EU Commission's and the
   Ministry's future policy in this area. We would like to thank reviewers
   of the ICES Review Group for Evaluation of the North-Eastern Cod
   Management Plans as well as two anonymous reviewers for their useful
   comments on this study.}},
Number-of-Cited-References = {{26}},
Times-Cited = {{17}},
Usage-Count-Last-180-days = {{2}},
Usage-Count-Since-2013 = {{14}},
Journal-ISO = {{Fish Res.}},
Doc-Delivery-Number = {{537UT}},
Unique-ID = {{ISI:000273140400006}},
OA = {{No}},
DA = {{2017-08-17}},
}

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