Advice and Scenarios Database



Whiting (Merlangius merlangus) in Division 6.a (West of Scotland)
StockCode (Assessment Component)
whg.27.6a
Assessment Year
2026
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
25931






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 2028^
2027 2027 2027 2027 2027 2027 2028 2028 2027 2028
(t) (t) (t) (ratio) (ratio) (ratio) (t) (%) (%) (%)
ICES Basis Advice
Maximum sustainable yield (MSY) approach: SSB (2028) = Blim 1993 1207 786 0.083 0.025 0.058 17286 -10.9 -63 50
Other scenarios
Maximum sustainable yield (MSY) approach: FMSY × SSB (2027)/MSY Btrigger 3638 2188 1450 0.159 0.048 0.111 15729 -18.8 -32 64
MSY approach: FMSY lower × SSB (2027) /MSY Btrigger 3049 1836 1213 0.131 0.039 0.092 16293 -16.1 -43 58
F=0 0 0 0 0 0 0 19044 -1.89 -100 34
F= FMSY 4653 2777 1876 0.21 0.063 0.147 14798 -24 -13.3 70
F= FMSY lower 3920 2353 1567 0.173 0.052 0.121 15462 -20 -27 65
F= FPA 4653 2777 1876 0.21 0.063 0.147 14798 -24 -13.3 70
SSB(2028)=BPA=MSYBtrigger^^
SSB (2028)=SSB (2027)^^
F=F2026 569 345 224 0.023 0.007 0.016 18559 -4.4 -89 39
P(SSB(2028) <; Blim) = 5%^^




Symbol Footnotes
* SSB 2028 relative to SSB 2027.
** Advice value for 2027 relative to the corresponding 2026 value (5364 tonnes).
^ The probability of SSB being below Blim in 2028. This probability relates to the short-term probability of SSB <; Blim and is not comparable to the long-term probability of SSB <; Blim. Fishing mortalities less than FPA have been shown to have less than 5% probability of the stock being below Blim in the long term when tested through simulations when estimating fishing mortality reference points
^^ These options were left blank because they cannot be achieved in 2028, even with zero catch in 2027.