Advice and Scenarios Database



Whiting (Merlangius merlangus) in Division 7.a (Irish Sea)
StockCode
whg.27.7a
Assessment Year
2021
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
14474
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.7887






Catch scenarios


Basis
Total catch
Projected landings
Projected discards
F total
Fprojected landings
Fprojected discards
SSB
% SSB change*
% TAC change**
% advice change^^
2022 2022 2022 2022 2022 2022 2023 2023 2023 2023
(t) (t) (t) (ratio) (ratio) (ratio) (t) (%) (%) (%)
ICES Basis Advice
MSY approach 0 0 0 0 0 0 2334 76 -100
Other scenarios
FMSY=Fpa 498 109 390 0.22 0.03 0.189 1884 42 -31
F=0 0 0 0 0 0 0 2334 76 -100
FMSYlower 368 81 288 0.158 0.022 0.136 2000 51 -49
FMSYupper 498 109 390 0.22 0.03 0.189 1884 42 -31
FMSY×SSB2022/MSYBtrigger 44 10 34 0.0178 0.0024 0.0154 2294 73 -94
FMSYlower×SSB2022/MSYBtrigger 32 7 25 0.0128 0.00177 0.0111 2305 74 -96
FMSYupper×SSB2022/MSYBtrigger 44 10 34 0.0178 0.0024 0.0154 2294 73 -94
Flim 794 172 622 0.37 0.051 0.32 1625 23 10.1
SSB2023=Blim^
SSB2023=Bpa=MSYBtrigger^
SSB2023=SSB2022 1149 245 904 0.58 0.08 0.5 1326 0 59
SSB2023=SSB2022* 1.2 834 180 654 0.39 0.054 0.34 1591 20 15.7
F=F2021 1254 267 987 0.65 0.089 0.56 1240 -6.5 74




Symbol Footnotes
* SSB 2023 relative to SSB 2022.
** Total catch in 2022 relative to TAC 2021 (721 tonnes)
^ The Blim, Bpa, and MSY Btrigger options were left blank because Blim, Bpa, and MSY Btrigger cannot be achieved in 2023, even with zero catch.
^^ This is not provided as catch advice for 2020 and 2021 was 0.