Advice and Scenarios Database



Sole (Solea solea) in Subarea 4 (North Sea)
StockCode
sol.27.4
Assessment Year
2018
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
9906
Link to Advice Sheet
https://doi.org/10.17895/ices.pub.4458






Catch scenarios


Basis
Total catch*
Wanted catch**
Unwanted catch
Ftotal# (ages 2–6)
Fwanted (ages 2–6)
Funwanted (ages 1–3)
SSB
% 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
EU MAP^^^: FMSY 12801 11800 1001 0.202 0.168 0.063 54818 -1.13 -18.4 -18.6
F = MAP FMSY lower 7451 6871 579 0.113 0.094 0.035 59539 7.4 -53 -53
F = MAP FMSY upper 21644 19935 1709 0.367 0.3 0.114 47056 -15.1 38 38
Other scenarios
MSY approach: FMSY 12801 11800 1001 0.202 0.168 0.063 54818 -1.13 -18.4 -18.6
Fmp (former management plan) 12685 11694 992 0.2 0.166 0.062 54920 -0.95 -19.2 -19.3
F = 0 0 0 0 0 0 0 66140 19.3 -100 -100
Fpa 25155 23160 1994 0.44 0.37 0.136 43990 -21 60 60
Flim 33281 30614 2667 0.63 0.52 0.195 36935 -33 112 112
SSB (2020) = Blim 45702 41967 3735 1 0.83 0.31 26300 -53 191 191
SSB (2020) = Bpa 33206 30546 2661 0.63 0.52 0.194 37000 -33 112 111
SSB (2020) = MSYBtrigger 33206 30546 2661 0.63 0.52 0.194 37000 -33 112 111
F = F2018 13857 12772 1085 0.22 0.183 0.068 53889 -2.8 -11.7 -11.9
Rollover TAC 15694 14463 1231 0.25 0.21 0.078 52273 -5.7 0 -0.2
A: Max. 19091 0.324 47986 -13 22 21
B: Min. 4158 0.063 61136 10 -74 -74
C: COD 8797 0.138 57036 3 -44 -44
D: SQ effort 12696 0.205 53601 -3 -19 -19
E: Value 12623 0.203 53665 -3 -20 -20
F: Range[1] 11872 0.186 55792 1 -24 -25




Symbol Footnotes
# Fwanted and Funwanted do not sum up to the Ftotal as they are calculated using different ages.
* Differences between the total catch and the sum of wanted and unwanted catches result from rounding.
** “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 average discard rate estimates for 2015–2017.
*** SSB 2020 relative to SSB 2019.
^ Total catch in 2019 relative to TAC in 2018 (15694 t).
^^ Total catch in 2019 relative to advice value 2018 (15726 t).
^^^ Proposed EU multiannual plan (MAP) for the North Sea (EU, 2016)
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. COD: Each fleet stops fishing when its individual cod share is exhausted.
D. SQ (status quo) effort scenario: The effort of each fleet in 2017 and 2018 is as in 2016.
E. 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.
F. 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).