Stock assessment graphs

ICES Marine Data

Stock Assessment Graphs


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Four-spot megrim (Lepidorhombus boscii) in Divisions VIIIc and IXa
Species:	Lepidorhombus boscii
Stock code:	mgb-8c9a
Assessment Year:	2016
Key:	7581


Unit weights	tonnes
Unit recruitment	thousands
Fishing pressure description	F
Fishing pressure units	Year-1
Stock size description	SSB
Stock size units	tonnes


Fish reference points

Management plan	SSB_MP
Management plan	F_MP
MSY approach	MSYB_trigger	4600
MSY approach	F_MSY	0.19
Precautionary approach	B_lim	3300
	B_pa	4600
	F_lim	0.57
	F_pa	0.41

Age and Length

Recruitment	0
F	2-4

Fish data

Year	Recruitment	TBiomass	SSB	Landings	Catches	Discards	F
1986	71931	5178	4299	1124	1408	284	0.4476
1987	52338	7308	6037	1688	2021	333	0.4514
1988	57185	7835	6746	2223	2586	363	0.4793
1989	53613	7805	6742	2629	3037	408	0.6258
1990	40371	6756	5981	1945	2354	409	0.4585
1991	63379	6635	5766	1682	2129	447	0.3914
1992	58918	6386	5448	1916	2353	437	0.6161
1993	29523	6035	5330	1384	1822	438	0.5046
1994	47963	6422	5601	1402.63306	1920	517	0.4802
1995	59500	5933	5000	1652.14742	2058	406	0.6008
1996	42792	5230	4422	1097.6869	1466	368	0.5468
1997	30264	4443	3895	895.594196893958	1204	308	0.3573
1998	21406	5056	4563	1123.018	1501	378	0.4107
1999	36281	4566	4064	1124.74786575655	1442	317	0.4249
2000	35916	4417	3816	1040.560968	1414	373	0.4872
2001	37099	3814	3216	930.78478	1221	290	0.5403
2002	39793	4133	3388	719.623077	1028	308	0.423
2003	50899	4725	3737	875.53158	1067	191	0.325
2004	36780	4988	4063	1005.9341857	1354	348	0.4475
2005	52507	4903	4069	982.760944	1358	375	0.382
2006	51472	5643	4660	1091.7805145	1427	335	0.4546
2007	37528	5460	4602	1104	1396	292	0.3652
2008	27845	5977	5308	979.8569522	1182	202	0.2756
2009	63439	5949	5236	1134.292347885	1413	279	0.3013
2010	46987	6362	5705	1297.367005286	1562	265	0.2713
2011	47921	5947	5262	1127.9455069676	1397	269	0.2671
2012	75809	7473	5967	951.596891354	1321	369	0.2364
2013	48207	6396	5514	931.118959575	1427	496	0.315
2014	90047	7319	6389	1154.3457184	1942	787.55	0.3667
2015	43283	7908	6615	1147.59391567	1745	597.369	0.4062
2016	43283		7180

Custom reference points

Custom fish data column names

Custom fish data

Sensivity data

Age	M	Mat	WeSt	F	WeCa	Fd	WeCad
0	0.2	0	0.0052	0	0.0022	0.0059	0.0052
1	0.2	0.55	0.024	0.000313477500813781	0.0352	0.1615	0.024
2	0.2	0.86	0.044	0.0295	0.0656	0.2458	0.0412
3	0.2	0.97	0.0708	0.1855	0.0844	0.1672	0.0542
4	0.2	0.99	0.1006	0.4051	0.1046	0.0548	0.0778
5	0.2	1	0.131	0.5039	0.1318	0.0123	0.104
6	0.2	1	0.1646	0.4447	0.1646	0.0032	0.128
7	0.2	1	0.2202	0.4475	0.2202	0.00050862748348027	0.1046