Advice and Scenarios Database



Haddock (Melanogrammus aeglefinus) in divisions 7.b-k (southern Celtic Seas and English Channel)
StockCode
had.27.7b-k
Assessment Year
2018
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
9868
Link to Advice Sheet
https://doi.org/10.17895/ices.pub.4453






Catch scenarios


Basis
Total catch (2019)
Wanted catch* (2019)
Unwanted catch* (2019)
Ftotal (2019)
F Wanted (2019)
F Unwanted (2019)
SSB (2020)
% SSB change **
% TAC change ***
% Advice change^
2019 2019 2019 2019 2019 2019 2020 2020 2020 2020
(t) (t) (t) (ratio) (ratio) (ratio) (t) (%) (%) (%)
ICES Basis Advice
MSY approach: FMSY 6317 3761 2556 0.4 0.35 0.049 21650 62 -9 -24
Other scenarios
FMSYlower 4310 2592 1718 0.26 0.23 0.032 23559 76 -38 -48
FMSYupper 8863 5205 3659 0.6 0.53 0.074 19245 44 28 6
F = 0 0 0 0 0 27695 107 -100 -100
Fpa 11991 6905 5087 0.89 0.78 0.11 16324 22 74 43
Flim 16326 9095 7232 1.41 1.24 0.174 12356 -8 136 95
SSB2020 = Blim 22818 11868 10950 2.7 2.4 0.33 6700 -50 230 173
SSB2020 = Bpa= MSYBtrigger 18969 10309 8660 1.83 1.6 0.23 10000 -25 175 127
F = F2018 9536 5578 3959 0.66 0.58 0.081 18613 39 38 14.1
Mixed-fisheries options
A: Max. 9593 0.66 18560 38 40
B: Min. 0 0 27695 107 -100
C: Stock 6317 0.4 21650 62 -9
D: SQ effort 9948 0.7 18228 36 40
E: Value 6718 0.43 21320 59 -3
F: Range 4381 0.26 23491 76 37




Symbol Footnotes
* Wanted catch is the predicted landed catch above the minimum conservation reference size (MCRS). Unwanted catch are the landings below MCRS and discards.
** SSB 2020 relative to SSB 2019.
*** Total catch in 2019 relative to TAC in 2018 (6910 tonnes).
^ Advice value for 2019 relative to advice value for 2018 (8358 tonnes).
A Mximum scenrio: Ech fleet stops fishing when its lst stock shre is exhusted.
B Minimum scenario: Each fleet stops fishing when its first stock share is exhausted.
C Stok senario: Eah fleet stops fishing when its individual stok share is exhausted.
D SQ (status quo) effort scenario: The effort of each fleet in 2018 an 2019 is the same as in 2017.
E Valu scnario: Th ffort of ach flt is qual to th wightd avrag of th fforts rquird to catch th flt’s quota shar of ach of th stocks, whr th wights ar th rlativ catch valus (pric × wight) of ach stock in th flt’s portfolio.
F Range scenario: The potential or TAC mismatch in 2019 is minimized within the MSY range, or the demersal ish stocks or which such a range is available (cod in divisions 7.e–k, haddock in divisions 7.b–k, and whiting in divisions 7.b–c and 7.e–k).