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 2025
(t) (t) (t) (t) (t) (ratio) (ratio) (ratio) (ratio) (t) (%) (%)
ICES Basis Advice
MSY approach: FMSY 111953 77000 32933 2163 109933 0.393 0.25 0.137 0.0074 282612 -18.8 1.6
Other scenarios
FMSY upper 131789 90504 38980 2095 129484 0.473 0.3 0.165 0.0074 268865 -23 19.6
FMSY lower 85304 58782 24925 2250 83707 0.292 0.184 0.101 0.0074 301126 -13.4 -23
F = 0 (IBC only) 2571 0 0 2571 0 0.0074 0 0 0.0074 366442 5.3 -98
F = F2023 29686 20525 8568 2422 29094 0.101 0.06 0.033 0.0074 339896 -2.3 -73
0.75 × F2023† 22436 15518 6466 2444 21985 0.076 0.045 0.025 0.0074 344961 -0.83 -80
1.25 × F2023† 36857 25473 10653 2401 36126 0.126 0.075 0.041 0.0074 334890 -3.7 -67
Fpa 131789 90504 38980 2095 129484 0.473 0.3 0.165 0.0074 268865 -23 19.6
Flim 226194 153812 69182 1738 222994 0.935 0.6 0.33 0.0074 204040 -41 105
SSB (2025) = Bpa= MSYBtrigger 312289 208685 100814 1316 309499 1.61 1.03 0.57 0.0074 148888 -58 183
SSB (2025) = Blim 384690 244785 140045 781 384830 3.08 1.98 1.09 0.0074 107146 -69 249




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.
† Multiplier only applied to F (discards) and F (landings), with F (IBC) constant.
^ SSB 2025 relative to SSB 2024.
^^ Total catch 2024 relative to the advice value 2023 (110 172tonnes).