Catch scenarios

Basis	Total catch	Wanted catch*	Unwanted catch*	Ftotal ages 3–7	Fwanted ages 3–7	Funwanted ages 1–3	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: FMSY × SSB (2018)/MSY Btrigger	3866	3429	437	0.243	0.22	0.07	18697	2	42
Other scenarios
Constant TAC	2724	2418	306	0.168	0.15	0.05	19866	9	0
TAC (2017) +15% ^	3133	2780	353	0.192	0.17	0.05	19448	7	15
TAC (2017) -15% ^	2315	2056	259	0.139	0.13	0.04	20284	11	-15
F = 0	0	0	0	0			22660	24	-100
FMSY	4052	3593	459	0.256	0.23	0.07	18508	1	49
Fpa	4052	3593	459	0.256	0.23	0.07	18508	1	49
Flim	5424	4803	621	0.359	0.32	0.1	17108	-6	99
SSB (2019) = Blim	8731	7704	1027	0.657	0.59	0.19	13751	-25	221
SSB (2019) = Bpa	3325	2950	375	0.205	0.19	0.06	19251	5	22
SSB (2019) = MSYBtrigger	3325	2950	375	0.205	0.19	0.06	19251	5	22
F = F2017	3698	3280	418	0.231	0.21	0.07	18869	3	36
Proposed NWWAC management strategy with current FMSY	4052	3593	459	0.256	0.23	0.07	18508	1	49
Proposed NWWAC management strategy with FMSY as specified in the plan	4654	4124	530	0.3	0.27	0.09	17893	-2	71
A: Max.	6132			0.41			16634	-9
B: Min.	2254			0.13			20594	13
C: HAD	3012			0.18			20251	11
D: POK	3909			0.26			17902	-2
E: SQ effort	3517			0.22			19146	5
F: Value	3664			0.22			19151	5
G: Range	4018			0.26			18451	1

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.
**	SSB 2019 relative to SSB 2018.
***	Total catch in 2018 relative to TAC in 2017 (2724 t)^.
^	Version 2: corrected TAC in 2017 (2724 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).