Catch scenarios

Basis	Total catch*	Wanted catch** (2019)	Unwanted catch** (2019)	Fwanted (2019)	SSB (2020)	% SSB change ***	% TAC change ^	% Advice change ^^
	2019	2019	2019	2019	2020	2020	2020	2020
	(t)	(t)	(t)	(ratio)	(t)	(%)	(%)	(%)
ICES Basis Advice
MSY approach: FMSY	1272	1237	35	0.29	3882	-5.4	5.8	2.7
Other scenarios
F = FMSY lower	748	728	20	0.16	4379	6.7	-38	-40
F = FMSY upper	1456	1416	40	0.34	3709	-9.6	21	18
F = 0	0	0	0	0	5092	24	-100	-100
Fpa	1383	1346	38	0.32	3777	-8	15	12
Flim	1797	1748	49	0.44	3387	-18	50	45
SSB (2020) = Blim	3291	3202	89	1.05	2000	-51	174	166
SSB (2020) = Bpa= MSYBtrigger	2317	2254	63	0.61	2900	-29	93	87
F = F2018	980	953	27	0.22	4159	1.32	-18	-21
Management plan: F = 0.27 with 15% TAC constraint	1196	1163	32	0.27	3955	-3.7	-0.5	-3.5

Symbol	Footnotes
*	Total catch derived from the wanted catch and the unwanted catches ratio.
**	“Wanted” and “unwanted” catch are used to describe fish that would be landed and discarded, respectively, in the absence of the EU landing obligation, based on discard rate estimates for 2015–2017.
***	SSB 2020 relative to SSB 2019.
^	Total catch in 2019 relative to TAC in 2018 (1202 tonnes).
^^	Advice value for 2019 relative to the advice value for 2018 (1239 tonnes).