Advice and Scenarios Database



Whiting (Merlangius merlangus) in Division 6.a (West of Scotland)
StockCode (Assessment Component)
whg.27.6a
Assessment Year
2025
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
20988






Catch scenarios


Basis
Total catch
Projected landings
Projected discards
Ftotal
Fprojected landings
Fprojected discards
SSB
% SSB change *
% advice change**
% probability of being below Blim in 2027^
2026 2026 2026 2026 2026 2026 2027 2027 2026 2027
(t) (t) (t) (ratio) (ratio) (ratio) (t) (%) (%) (%)
ICES Basis Advice
Maximum sustainable yield (MSY) approach: FMSY × SSB (2026)/MSY Btrigger 5364 2809 2555 0.21 0.079 0.131 23970 -6.2 4.8 13.5
Other scenarios
MSY approach: FMSY lower × SSB (2026) /MSY Btrigger 4494 2354 2140 0.173 0.065 0.108 24771 -3 -12.2 11
F=0 0 0 0 0 0 0 28825 12.9 -100 2.8
F= FMSY 5374 2815 2559 0.21 0.079 0.131 23960 -6.2 5 13.5
F= FMSY lower 4503 2359 2144 0.173 0.065 0.108 24764 -3 -12 11
F= FPA 5374 2815 2559 0.21 0.079 0.131 23960 -6.2 5 13.5
SSB (2027)=Blim 13044 6756 6288 0.6 0.23 0.38 17286 -32 155 50
SSB(2027)=BPA=MSYBtrigger 3591 1888 1703 0.136 0.051 0.085 25597 0.22 -30 8.6
SSB (2027)=SSB (2026) 3652 1920 1732 0.138 0.052 0.086 25542 0 -29 8.7
F=F2025 836 442 394 0.03 0.011 0.019 28029 9.7 -84 3.5




Symbol Footnotes
* SSB 2027 relative to SSB 2026.
** Advice value for 2026 relative to the corresponding 2025 value (5 116 tonnes).
^ The probability of SSB being below Blim in 2027. This probability relates to the short-term probability of SSB <; Blim and is not comparable to the long-term probability of SSB <; Blim tested in simulations when estimating fishing mortality reference points.