Revisiting safe biological limits in fisheries. Froese, R., Coro, G., Kleisner, K., & Demirel, N. FISH AND FISHERIES, 17(1):193-209, WILEY-BLACKWELL, 111 RIVER ST, HOBOKEN 07030-5774, NJ USA, MAR, 2016.
doi  abstract   bibtex   
The appropriateness of three official fisheries management reference points used in the north-east Atlantic was investigated: (i) the smallest stock size that is still within safe biological limits (SSBpa), (ii) the maximum sustainable rate of exploitation (F-msy) and (iii) the age at first capture. As for (i), in 45% of the examined stocks, the official value for SSBpa was below the consensus estimates determined from three different methods. With respect to (ii), the official estimates of F-msy exceeded natural mortality M in 76% of the stocks, although M is widely regarded as natural upper limit for F-msy. And regarding (iii), the age at first capture was below the age at maturity in 74% of the stocks. No official estimates of the stock size (SSBmsy) that can produce the maximum sustainable yield (MSY) are available for the north-east Atlantic. An analysis of stocks from other areas confirmed that twice SSBpa provides a reasonable preliminary estimate. Comparing stock sizes in 2013 against this proxy showed that 88% were below the level that can produce MSY. Also, 52% of the stocks were outside of safe biological limits, and 12% were severely depleted. Fishing mortality in 2013 exceeded natural mortality in 73% of the stocks, including those that were severely depleted. These results point to the urgent need to re-assess fisheries reference points in the north-east Atlantic and to implement the regulations of the new European Common Fisheries Policy regarding sustainable fishing pressure, healthy stock sizes and adult age/size at first capture.
@article{ ISI:000371240900010,
Author = {Froese, Rainer and Coro, Gianpaolo and Kleisner, Kristin and Demirel,
   Nazli},
Title = {{Revisiting safe biological limits in fisheries}},
Journal = {{FISH AND FISHERIES}},
Year = {{2016}},
Volume = {{17}},
Number = {{1}},
Pages = {{193-209}},
Month = {{MAR}},
Abstract = {{The appropriateness of three official fisheries management reference
   points used in the north-east Atlantic was investigated: (i) the
   smallest stock size that is still within safe biological limits (SSBpa),
   (ii) the maximum sustainable rate of exploitation (F-msy) and (iii) the
   age at first capture. As for (i), in 45\% of the examined stocks, the
   official value for SSBpa was below the consensus estimates determined
   from three different methods. With respect to (ii), the official
   estimates of F-msy exceeded natural mortality M in 76\% of the stocks,
   although M is widely regarded as natural upper limit for F-msy. And
   regarding (iii), the age at first capture was below the age at maturity
   in 74\% of the stocks. No official estimates of the stock size (SSBmsy)
   that can produce the maximum sustainable yield (MSY) are available for
   the north-east Atlantic. An analysis of stocks from other areas
   confirmed that twice SSBpa provides a reasonable preliminary estimate.
   Comparing stock sizes in 2013 against this proxy showed that 88\% were
   below the level that can produce MSY. Also, 52\% of the stocks were
   outside of safe biological limits, and 12\% were severely depleted.
   Fishing mortality in 2013 exceeded natural mortality in 73\% of the
   stocks, including those that were severely depleted. These results point
   to the urgent need to re-assess fisheries reference points in the
   north-east Atlantic and to implement the regulations of the new European
   Common Fisheries Policy regarding sustainable fishing pressure, healthy
   stock sizes and adult age/size at first capture.}},
Publisher = {{WILEY-BLACKWELL}},
Address = {{111 RIVER ST, HOBOKEN 07030-5774, NJ USA}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Froese, R (Reprint Author), GEOMAR Helmholtz Ctr Ocean Res, Dusternbrooker Weg 20, D-24105 Kiel, Germany.
   Froese, Rainer, GEOMAR Helmholtz Ctr Ocean Res, Dusternbrooker Weg 20, D-24105 Kiel, Germany.
   Coro, Gianpaolo, CNR, Ist Sci \& Tecnol Informaz A Faedo, Via Moruzzi 1, I-56124 Pisa, Italy.
   Kleisner, Kristin, Univ British Columbia, Fisheries Ctr, Sea Us Project, 2202 Main Mall, Vancouver, BC V6J 1Z4, Canada.
   Demirel, Nazli, Istanbul Univ, Inst Marine Sci \& Management, Muskule Sok 17, TR-34134 Istanbul, Turkey.}},
DOI = {{10.1111/faf.12102}},
ISSN = {{1467-2960}},
EISSN = {{1467-2979}},
Keywords = {{Bayesian hockey stick; fisheries reference points; maximum sustainable
   yield; natural mortality; north-east Atlantic; safe biological limits}},
Keywords-Plus = {{MANAGEMENT; EUROPE; FISH}},
Research-Areas = {{Fisheries}},
Web-of-Science-Categories  = {{Fisheries}},
Author-Email = {{rfroese@geomar.de}},
ResearcherID-Numbers = {{Froese, Rainer/C-9687-2009
   Demirel, Nazli/H-5679-2012}},
ORCID-Numbers = {{Froese, Rainer/0000-0001-9745-636X
   Demirel, Nazli/0000-0003-4542-9276}},
Funding-Acknowledgement = {{iMarine project (FP7 European Commission, INFRASTRUCTURES) {[}283644];
   European Union's Seventh Framework Programme {[}244706/ECOKNOWS];
   Lenfest Ocean Program at The Pew Charitable Trusts {[}00002841];
   Scientific and Technological Research Council of Turkey (TUBITAK); Sea
   Around Us; University of British Columbia and the Pew Charitable Trusts}},
Funding-Text = {{We thank James Thorson and Samu Mantyniemi for useful comments on the
   implementation of the Bayesian hockey stick. Gianpaolo Coro acknowledges
   support by the iMarine project (FP7 of the European Commission,
   INFRASTRUCTURES-2011-2, Contract No. 283644). Rainer Froese acknowledges
   support by the European Union's Seventh Framework Programme
   (FP7/2007-2013) under grant agreement 244706/ECOKNOWS project and by the
   Lenfest Ocean Program at The Pew Charitable Trusts under contract ID
   00002841. Nazli Demirel acknowledges support from The Scientific and
   Technological Research Council of Turkey (TUBITAK). Kristin Kleisner
   acknowledges support from the Sea Around Us, a scientific collaboration
   between the University of British Columbia and the Pew Charitable
   Trusts. This is FIN Contribution Number 163.}},
Number-of-Cited-References = {{45}},
Times-Cited = {{1}},
Usage-Count-Last-180-days = {{1}},
Usage-Count-Since-2013 = {{18}},
Journal-ISO = {{Fish. Fish.}},
Doc-Delivery-Number = {{DF3JU}},
Unique-ID = {{ISI:000371240900010}},
OA = {{No}},
DA = {{2017-08-17}},
}

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