Catch scenarios

Basis	Total catch *	Wanted catch**	Unwanted catch**	Fwanted	SSB	% SSB change ***	% TAC change^	% Advice change ^^
	2020	2020	2020	2020	2021	2021	2020	2020
	(t)	(t)	(t)	(ratio)	(t)	(%)	(%)	(%)
ICES Basis Advice
MSY approach: FMSY × SSB2020/MSY Btrigger	561	542	19	0.184	3028	-5.9	36	36
Other scenarios
F = FMSYlower× SSB2020/MSYBtrigger	457	441	16	0.147	3126	-2.9	10.3	10.3
F = FMSYupper× SSB2020/MSYBtrigger	663	640	23	0.22	2934	-8.8	60	60
F = FMSY	606	585	21	0.2	2987	-7.2	46	46
F = 0	0	0	0	0	3552	10.3	-100	-100
Fpa	634	612	22	0.21	2961	-8	53	53
Flim	844	815	29	0.29	2766	-14	104	104
SSB2021 = Blim	1130	1091	39	0.41	2500	-22	173	173
SSB2021=Bpa =MSYBtrigger	55	53	2	0.0168	3500	8.8	-87	-87
F = F2019	414	400	14	0.133	3165	-1.7	0	0

Symbol	Footnotes
*	Total catches are calculated from wanted catch (fish that would be landed in the absence of the EU landing obligation), based on the average discard rate in 2016–2018 (3.5% in weight).
**	The “wanted” and “unwanted catch” are used to describe fish that would be landed and discarded, respectively, in the absence of the EU landing obligation.
***	SSB 2021 relative to SSB 2020.
****	Total catch in 2020 relative to TAC 2019 (414tonnes).
*****	Advice value 2020 relative to the advice value 2019 (414tonnes).