Advice and Scenarios Database



Whiting (Merlangius merlangus) in Division 7.a (Irish Sea)
StockCode (Assessment Component)
whg.27.7a
Assessment Year
2026
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
25926






Catch scenarios


Basis
Total catch
Projected landings
Projected discards
Projected recreational removals*
F total
Spawning-stock biomass (SSB)
% SSB change**
% total allowable catch (TAC) change ***
% advice change^
% probability of SSB < Blim ^^
2027 2027 2027 2027 2027 2028 2028 2027 2027 2028
(t) (t) (t) (t) (ratio) (t) (%) (%) (%) (%)
ICES Basis Advice
Maximum sustainable yield (MSY) approach: FMSY x SSB2027/MSY Btrigger 209 14 174 21 0.121 2374 77 -68 4.5 0.3
Other scenarios
FMSY 351 23 292 35 0.21 2214 65 -46 76 1.9
FPA 1071 71 892 107 0.78 1441 7.5 66 436 76
F=0 0 0 0 0 0 2622 96 -100 -100 0.1
FMSYlower 272 18 227 27 0.16 2302 72 -58 36 0.9
FMSYlower SSB2027/MSYBtrigger 161 11 134 16 0.092 2430 81 -75 -19.5 0.2
SSB2028=Blim 849 57 707 85 0.58 1670 25 31 325 50
SSB2028=MSY Btrigger = BPA 252 17 210 25 0.148 2322 73 -61 26 0.5
SSB2028=SSB2027 1174 78 978 118 0.88 1341 0 82 487 86
F=F2026 1093 73 911 109 0.8 1420 5.9 69 447 79
P(SSB2028 <; Blim) = 5% 463 31 386 46 0.28 2084 55 -28 132 5




Symbol Footnotes
* Recreational estimates are based on the proportion of catches attributed to recreational removals in 2025 (10%).
** SSB 2028 relative to SSB 2027.
*** Total advice in 2027 relative to the TAC in 2026 (646tonnes).
^ Advice value for 2027 relative to the advice value for 2026 (200 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.