Advice and Scenarios Database



Whiting (Merlangius merlangus) in Subarea 4 and Division 7.d (North Sea and eastern English Channel)
StockCode
whg.27.47d
Assessment Year
2023
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
17795
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.21864324.v2






Catch scenarios


Basis
Total catch
Projected landings*
Projected discards*
Projected IBC*
Human Consumption catch
Ftotal (ages 2–5)**
Fprojected landings (ages 2–5)
Fprojected discards (ages 2–5)
Fprojected IBC (ages 2–5)***
SSB
% SSB change^
% advice change^^
2024 2024 2024 2024 2024 2024 2024 2024 2024 2025 2025 2024
(t) (t) (t) (t) (t) (ratio) (ratio) (ratio) (ratio) (t) (%) (%)
ICES Basis Advice
MSY approach: FMSY 128290 89707 36502 2082 126209 0.393 0.25 0.137 0.0074 268348 -23 16.5
Other scenarios
FMSY upper 154187 108173 44033 1981 152206 0.473 0.3 0.165 0.0074 248162 -29 40
FMSY lower 95596 66393 26993 2209 93387 0.292 0.184 0.101 0.0074 293833 -15.5 -13.2
F = 0 (IBC only) 2571 0 0 2571 0 0.0074 0 0 0.0074 366442 5.3 -98
F = F2023 33767 22305 9012 2450 31317 0.101 0.06 0.033 0.0074 342027 -1.7 -69
Rollover TAC 45150 30422 12322 2406 42745 0.136 0.083 0.046 0.0074 333154 -4.2 -59
0.75 × F2023^^^ 26127 16857 6791 2480 23647 0.077 0.045 0.025 0.0074 347983 0.00034 -76
1.25 × F2023^^^ 41241 27634 11186 2421 38820 0.124 0.075 0.041 0.0074 336202 -3.4 -63
Fpa 154187 108173 44033 1981 152206 0.473 0.3 0.165 0.0074 248162 -29 40
Flim 303741 214817 87526 1398 302343 0.935 0.6 0.33 0.0074 131587 -62 176
SSB (2025) = Bpa= MSYBtrigger 281346 198848 81014 1485 279861 0.87 0.55 0.3 0.0074 148888 -57 155
SSB (2025) = Blim 334854 237003 96575 1277 333577 1.03 0.66 0.36 0.0074 107146 -69 204




Symbol Footnotes
* The split of catch between landings, discards, and industrial bycatch (IBC) in 2024 was done using recent (2020–2022) partial age-dependent fishing mortalities as a forecasting assumption.
** Total F is calculated as the sum of partial fishing mortalities.
*** F (IBC) is assumed to be constant in all scenarios at status quo value.
^ SSB 2025 relative to SSB 2024.
^^ Total catch 2024 relative to the advice value 2023 (110 172 tonnes).
^^^ Multiplier only applied to F (discards) and F (landings), with F (IBC) constant.