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
2017
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
8824
Link to Advice Sheet
https://doi.org/10.17895/ices.pub.3123






Catch scenarios


Basis
Total catch (2018)
Landings (2018)
Discards (2018)
Ftotal (2018)
FLandings (2018)
Fdiscards (2018)
SSB (2019)
% SSB change *
% TAC change **
2018 2018 2018 2018 2018 2018 2019 2019 2019
(t) (t) (t) (ratio) (ratio) (ratio) (t) (%) (%)
ICES Basis Advice
MSY approach: FMSY 8358 5911 2446 0.4 0.36 0.044 24953 23 -24
Other scenarios
F = 0 0 0 0 0 0 0 32908 62 -100
Fpa 15622 10817 4805 0.89 0.79 0.1 18170 -10.3 40
Flim 20959 14206 6753 1.41 1.25 0.16 13311 -34 83
SSB (2019) = Blim 28588 18494 10094 2.7 2.4 0.31 6700 -67 139
SSB (2019) = Bpa= MSY Btrigger 24702 16415 8287 1.93 1.71 0.22 10000 -51 112
F = F2017 11267 7908 3359 0.58 0.51 0.06 22218 9.7 2
Mixed fisheries options
A: Max. 13193 0.77 18803 -7.2
B: Min. 7455 0.38 24213 20
C: Stock 7806 0.4 23880 17.9
D: SQ effort 11864 0.67 20047 -1.04
E: Value 10853 0.6 20998 3.7
F: Range 10913 0.55 22550 11.3




Symbol Footnotes
* SSB 2019 relative to SSB 2018.
** Landings in 2018 relative to TAC in 2017 (7751 t).  The % change is not indicated for the mixed fishery options as calculations are available for total catch.
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 2017 an 2018 is as in 2016.
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 of ach stock in th flt’s portfolio.
F Range scenario: where the potential or TAC mismatch in 2018 is minimised within the MSY range, or the demersal ish stocks or which such a range is available (Cod in divisions 7.e–k, Haddock in divisions7.b–k, and Whiting in divisions 7.b–ce–k).