Assessment of the Cod Stock in NAFO Division 3M
An assessment of the stauts of the cod stock in NAFO Division 3M is performed. The same model used last year, a Bayesian model, is used to perform the assessment. Results indicate another reasonable recruitment value in 2008 and a fairly substantial increase in SSB, reaching a median value above the...
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Centro Oceanográfico de Vigo
2009
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ftieo:oai:repositorio.ieo.es:10508/621 2023-05-15T17:33:03+02:00 Assessment of the Cod Stock in NAFO Division 3M González-Troncoso, D. (Diana) Fernández-Llana, C. (Carmen) Atlantic Ocean North Atlantic Northwest Atlantic NAFO 2009 http://hdl.handle.net/10508/621 eng eng Centro Oceanográfico de Vigo http://hdl.handle.net/10508/621 González Troncoso, D., Fernández, C. 2009. Assessment of the Cod Stock in NAFO Division 3M. NAFO Sci. Coun. Res. Doc. 09/034, Serial Nº N5670: 65p. Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ CC-BY-NC-ND workingPaper 2009 ftieo 2022-07-26T23:46:46Z An assessment of the stauts of the cod stock in NAFO Division 3M is performed. The same model used last year, a Bayesian model, is used to perform the assessment. Results indicate another reasonable recruitment value in 2008 and a fairly substantial increase in SSB, reaching a median value above the Blim for the first time since 1995. The six-years retrospective plot shows that the recruitment is over estimated year by year, and that if we assume a prior distribution under the natural mortality the retrospective pattern seems no to converge, so the model running with M constant equal to 2 is presented too. It results are no significantly different as those assuming M with uncertainty. Three year projections indicate that fishing at the low Fbar level currently estimated for 2008 should allow SSB to increase to higher levels than estimated for the late 1980's, although in terms of abundance the stock will remain at lower levels. If the fishing mortality were return to the levels seen until 1995, stock recovery would become very improbable. Report North Atlantic Northwest Atlantic Instituto Español de Oceanografía: e-IEO |
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Open Polar |
collection |
Instituto Español de Oceanografía: e-IEO |
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ftieo |
language |
English |
description |
An assessment of the stauts of the cod stock in NAFO Division 3M is performed. The same model used last year, a Bayesian model, is used to perform the assessment. Results indicate another reasonable recruitment value in 2008 and a fairly substantial increase in SSB, reaching a median value above the Blim for the first time since 1995. The six-years retrospective plot shows that the recruitment is over estimated year by year, and that if we assume a prior distribution under the natural mortality the retrospective pattern seems no to converge, so the model running with M constant equal to 2 is presented too. It results are no significantly different as those assuming M with uncertainty. Three year projections indicate that fishing at the low Fbar level currently estimated for 2008 should allow SSB to increase to higher levels than estimated for the late 1980's, although in terms of abundance the stock will remain at lower levels. If the fishing mortality were return to the levels seen until 1995, stock recovery would become very improbable. |
format |
Report |
author |
González-Troncoso, D. (Diana) Fernández-Llana, C. (Carmen) |
spellingShingle |
González-Troncoso, D. (Diana) Fernández-Llana, C. (Carmen) Assessment of the Cod Stock in NAFO Division 3M |
author_facet |
González-Troncoso, D. (Diana) Fernández-Llana, C. (Carmen) |
author_sort |
González-Troncoso, D. (Diana) |
title |
Assessment of the Cod Stock in NAFO Division 3M |
title_short |
Assessment of the Cod Stock in NAFO Division 3M |
title_full |
Assessment of the Cod Stock in NAFO Division 3M |
title_fullStr |
Assessment of the Cod Stock in NAFO Division 3M |
title_full_unstemmed |
Assessment of the Cod Stock in NAFO Division 3M |
title_sort |
assessment of the cod stock in nafo division 3m |
publisher |
Centro Oceanográfico de Vigo |
publishDate |
2009 |
url |
http://hdl.handle.net/10508/621 |
op_coverage |
Atlantic Ocean North Atlantic Northwest Atlantic NAFO |
genre |
North Atlantic Northwest Atlantic |
genre_facet |
North Atlantic Northwest Atlantic |
op_relation |
http://hdl.handle.net/10508/621 González Troncoso, D., Fernández, C. 2009. Assessment of the Cod Stock in NAFO Division 3M. NAFO Sci. Coun. Res. Doc. 09/034, Serial Nº N5670: 65p. |
op_rights |
Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766131415976509440 |