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Thornback ray (Raja clavata) in divisions 7.a and 7.f-g (Irish Sea, Bristol Channel, Celtic Sea North) (Link to advice)	Download graphs and tables(.doc) Download stock data (XML) Download standard graphs (zip) - regular size Download standard graphs (zip) - powerpoint size View on the map View source data

Species: Raja clavata
Stock code: rjc.27.7afg
Assessment Year:2022
Purpose:Advice
Assessment Key: 17523
Stock Key: 169204

Year	Biomass index	97.5%	2.5%	Landings

	Kilograms per hour			tonnes
1993	1.26	2.23	0.52
1994	1.38	2.16	0.7
1995	2.17	3.31	1.11
1996	1.74	2.73	0.96
1997	1.72	2.9	0.81
1998	2.23	3.32	1.26
1999	1.87	2.87	1.05
2000	1.17	1.91	0.55
2001	1.89	2.94	0.95
2002	1.82	2.67	1.1
2003	2.05	3.04	1.11
2004	4.37	8.2	1.78
2005	1.69	2.54	1.01
2006	1.81	2.89	0.9
2007	1.47	2.24	0.78
2008	2.06	3.16	1.21
2009	2.62	3.62	1.68	671
2010	2.61	3.56	1.68	780
2011	1.79	2.61	1.11	944
2012	1.93	2.69	1.27	1165
2013	3.26	4.5	2.1	1048
2014	3.42	4.75	2.36	790
2015	2.18	3.2	1.32	903
2016	4.64	6.39	3.05	862
2017	5.47	7.43	3.78	878
2018	6.79	9.22	4.6	840
2019	6.96	9.57	4.88	960
2020				909
2021	7.42	9.63	5.53	971
Average	2.85	4.15	1.76	902

Fishing pressure

Stock size

2019

2020

2021

2019

2020

2021

Maximum sustainable yield

F_{MSY proxy}

Below

MSY B_{trigger proxy}

Above

Precautionary approach

F_pa,F_lim

Unknown

B_pa,B_lim

Undefined

Management plan

F_MGT

Not applicable

B_MGT

Not applicable