Advice and Scenarios Database



Cod (Gadus morhua) in Subarea 4, Division 7.d, and Subdivision 20 (North Sea, eastern English Channel, Skagerrak)
StockCode
cod.27.47d20
Assessment Year
2017
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
9251
Link to Advice Sheet
https://doi.org/10.17895/ices.pub.3526






Catch scenarios


Basis
Total catch
Wanted catch*
Unwanted catch*
Ftotal
Fwanted
Funwanted
SSB
% 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: 53058 35725 17333 0.31 0.2 0.108 193248 6.8 -24
Other scenarios
EU–Norway Management Strategy (MS) with previous reference points 66224 44527 21697 0.4 0.26 0.14 180686 -0.168 -5.3
EU–Norway MS with new reference points 66224 44527 21697 0.4 0.26 0.14 180686 -0.168 -5.3
F = 0 0 0 0 0 0 0 244926 35 -100
Fpa 64805 43575 21230 0.39 0.25 0.136 182038 0.58 7.3
Flim 85121 56970 28151 0.54 0.35 0.189 162901 -10 21
SSB (2019) = Blim 148238 97786 50452 1.15 0.75 0.4 107000 -41 108
SSB (2019) = Bpa 99187 66220 32967 0.66 0.43 0.23 150000 -17.1 41
SSB (2019) = MSYBtrigger 99187 66220 32967 0.66 0.43 0.23 150000 -17.1 41
TAC (2017) – 20% 55919 37618 18301 0.33 0.21 0.115 190195 5.1 -20
TAC (2017) – 15% 59454 39970 19484 0.35 0.23 0.123 186777 3.2 -15
TAC (2017) – 10% 62998 42321 20677 0.38 0.25 0.132 183393 1.33 -10
TAC (2017) – 5% 66545 44672 21873 0.4 0.26 0.14 179881 -0.61 -5
Constant TAC 70094 47023 23071 0.43 0.28 0.149 176460 -2.5 0
TAC (2017) + 5% 73650 49374 24276 0.45 0.3 0.158 173105 -4.4 5
TAC (2017) + 10% 77207 51725 25482 0.48 0.31 0.167 169665 -6.3 10
TAC (2017) + 15% 80783 54076 26707 0.51 0.33 0.177 166176 -8.2 15
TAC (2017) + 20% 84378 56428 27950 0.53 0.35 0.186 162761 -10.1 20
F = F2017 62830 42277 20553 0.38 0.25 0.131 183927 1.62 -10.1
A: Max. 180241 1.44 91380 -55
B: Min. 47378 0.25 215196 5.4
C: HAD 60863 0.32 214510 5
E: POK 79380 0.53 156291 -23
E: SQ effort 70421 0.41 187234 -8.3
F: Value 63548 0.35 199183 -2.5
G: Range 63282 0.33 213162 4.4




Symbol Footnotes
* “Wanted” and “unwanted” catch are used to describe fish that would be landed and discarded in the absence of the EU landing obligation, based on discard rate estimates for 2016.
** SSB 2019 relative to SSB 2018.
*** Wanted catch in 2018 relative to TAC in 2017: North Sea (39 220 t) + Skagerrak (5744 t) + Eastern English Channel (2059 t) = 47 023 t.
A. Maximum scenario: Each fleet stops fishing when its last stock share is exhausted.
B. Minimum scenario: Each fleet stops fishing when its first stock share is exhausted.
C. HAD: Each fleet stops fishing when its individual haddock share is exhausted.
D. POK: Each fleet stops fishing when its individual saithe share is exhauste
E. SQ (status quo) effort scenario: The effort of each fleet in 2017 and 2018 is as in 2016.
F. Value scenario: The effort of each fleet is equal to the weighted average of the efforts required to catch the fleet’s quota share of each of the stocks, where the weights are the relative catch values of each stock in the fleet’s portfolio.
G. Range scenario: where the potential for TAC mismatches in 2018 are minimized within the FMSY range, for the demersal fish stocks for which such a range is available (cod.27.47d20; had.27.46a20; pok.27.3a46; ple.27.420; ple.27.7d; sol.27.4; sol.27.7d).