Revisiting safe biological limits in fisheries
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....
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ftistanbuluniv:oai:http://acikerisim.istanbul.edu.tr:20.500.12627/989 2023-05-15T17:38:15+02:00 Revisiting safe biological limits in fisheries Coro, Gianpaolo Demirel, Nazli Kleisner, Kristin Deniz Bilimleri ve İşletmeciliği Enstitüsü,-,Fiziksel Oşinografi Ve Deniz Biyolojisi orcid:0000-0003-4542-9276 2016 application/pdf https://hdl.handle.net/20.500.12627/989 eng eng Froese R., Coro G., Kleisner K., Demirel N., "Revisiting Safe Biological Limits İn Fisheries", Fısh And Fısherıes, Vol.17, Pp.193-209, 2016 1467-2960 http://hdl.handle.net/20.500.12627/989 17 193 209 Fısherıes article 2016 ftistanbuluniv https://doi.org/20.500.12627/989 2022-08-10T13:09:35Z 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 in Journal/Newspaper North East Atlantic İstanbul Üniversitesi Açık Erişim Sistemi |
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İstanbul Üniversitesi Açık Erişim Sistemi |
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ftistanbuluniv |
language |
English |
topic |
Fısherıes |
spellingShingle |
Fısherıes Coro, Gianpaolo Demirel, Nazli Kleisner, Kristin Revisiting safe biological limits in fisheries |
topic_facet |
Fısherıes |
description |
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. |
author2 |
Deniz Bilimleri ve İşletmeciliği Enstitüsü,-,Fiziksel Oşinografi Ve Deniz Biyolojisi orcid:0000-0003-4542-9276 |
format |
Article in Journal/Newspaper |
author |
Coro, Gianpaolo Demirel, Nazli Kleisner, Kristin |
author_facet |
Coro, Gianpaolo Demirel, Nazli Kleisner, Kristin |
author_sort |
Coro, Gianpaolo |
title |
Revisiting safe biological limits in fisheries |
title_short |
Revisiting safe biological limits in fisheries |
title_full |
Revisiting safe biological limits in fisheries |
title_fullStr |
Revisiting safe biological limits in fisheries |
title_full_unstemmed |
Revisiting safe biological limits in fisheries |
title_sort |
revisiting safe biological limits in fisheries |
publishDate |
2016 |
url |
https://hdl.handle.net/20.500.12627/989 |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_relation |
Froese R., Coro G., Kleisner K., Demirel N., "Revisiting Safe Biological Limits İn Fisheries", Fısh And Fısherıes, Vol.17, Pp.193-209, 2016 1467-2960 http://hdl.handle.net/20.500.12627/989 17 193 209 |
op_doi |
https://doi.org/20.500.12627/989 |
_version_ |
1766138630655442944 |