Advice and Scenarios Database



Hake (Merluccius merluccius) in divisions 8.c and 9.a, Southern stock (Cantabrian Sea and Atlantic Iberian waters)
StockCode
hke.27.8c9a
Assessment Year
2018
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
9759
Link to Advice Sheet
https://doi.org/10.17895/ices.pub.4464






Catch scenarios


Basis
Total catch
Wanted catch*
Unwanted catch*
Ftotal
Fwanted
Funwanted
SSB
% SSB change**
% Advice change***
2019 2019 2019 2019 2019 2019 2020 2020 2020
(t) (t) (t) (ratio) (ratio) (ratio) (t) (%) (%)
ICES Basis Advice
MSY approach: FMSY 8281 7220 1061 0.25 0.22 0.03 36104 51 -3.3
Other scenarios
F = 0 0 0 0 0 0 0 49332 106 -100
SSB (2020) = Blim 27478 23780 3698 1.48 1.28 0.2 8000 -67 221
SSB (2020) = Bpa = MSY Btrg 25204 21845 3359 1.21 1.05 0.16 11100 -54 194
Flim 23516 20401 3115 1.05 0.91 0.14 13443 -44 175
Fpa 19323 16793 2530 0.75 0.65 0.1 19421 -18.8 126
EU Recovery Plan^: F (2019) = Fsq - 10% 10647 9278 1369 0.34 0.3 0.04 32426 36 24
TAC constraint (-15%) 7869 6862 1007 0.24 0.21 0.03 36749 54 -8.1
TAC constraint (+15%) 10647 9278 1369 0.34 0.3 0.04 32426 36 24
F = FMSY lower 5873 5124 749 0.17 0.15 0.02 39900 67 -31
F = FMSY upper 11264 9814 1450 0.36 0.31 0.05 31475 32 32
equal SSB 16269 14155 2114 0.58 0.5 0.08 23904 0 90
equal TAC 9258 8070 1188 0.28 0.24 0.04 34578 45 8.1
Fsq 16583 14426 2157 0.6 0.52 0.08 23439 -1.95 94




Symbol Footnotes
* “Wanted” and “unwanted” catch are used to describe fish that would be landed and discarded in the absence of the EU landing obligation, based on discard rates at length estimated by the assessment model for 2015–2017.
** SSB 2020 relative to SSB 2019.
*** Total catch in 2019 relative to the advised catch for 2018 (8 561 tonnes).
^ Applying a 10% reduction in F relative to F2018 corresponds to a total catch in 2019, which is more than 15% greater than the 2018 TAC. Therefore, ICES has calculated this option as corresponding to a total catch in 2019 equal to TAC2018 × 1.15.