Stock assessment graphs

ICES Marine Data

Stock Assessment Graphs


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Herring (Clupea harengus) in Division 5.a, summer-spawning herring (Iceland grounds)
Species:	Stock Assessment Graphs
Stock code:	her.27.5a
Assessment Year:	2021
Key:	14593


Unit weights	tonnes
Unit recruitment	thousands
Fishing pressure description	HR
Fishing pressure units	ratio
Stock size description	SSB
Stock size units	tonnes


Fish reference points

Management plan	SSB_MP
Management plan	F_MP
MSY approach	MSYB_trigger	273000
MSY approach	F_MSY	0.22
Precautionary approach	B_lim	200000
	B_pa	273000
	F_lim	0.61
	F_pa	0.45

Age and Length

Recruitment	3
F	5-10

Fish data

Year	Recruitment	SSB	Landings	Catches	F
1987	529826	383813	75439	75439	0.181652411
1988	270994	423300	92828	92828	0.205210455
1989	447323	385511	101000	101000	0.25110149
1990	300817	349852	105097	105097	0.280577563
1991	840526	309707	109489	109489	0.344415541
1992	1033074	343171	108504	108504	0.307353352
1993	635401	423563	102741	102741	0.226261777
1994	691691	440691	134003	134003	0.290160424
1995	202685	406130	125851	125851	0.288227588
1996	131870	307415	95882	95882	0.297463693
1997	772482	268810	64931	64931	0.243063772
1998	320427	298282	87238	87238	0.266204511
1999	552469	289567	92896	92896	0.311858906
2000	391176	306259	100332	100332	0.308291161
2001	468427	271805	95675	95675	0.331647381
2002	1455459	297139	96208	96208	0.34564967
2003	1074872	389334	125717	125717	0.313485786
2004	663282	486223	114237	114237	0.217773833
2005	991082	525516	103043	103043	0.19081033
2006	736809	612062	135303	135303	0.200814194
2007	658324	568650	158917	158917	0.265408242
2008	526782	564453	151780	151780	0.25421972
2009	444698	488656	46332	46332	0.084152615
2010	468500	451143	43533	43533	0.085670634
2011	532877	429167	49446	49446	0.103844138
2012	394177	433957	71976	71976	0.157576023
2013	478673	384251	72058	72058	0.179236461
2014	240452	407597	94975	94975	0.21896426
2015	223088	347379	69729	69729	0.19154167
2016	288877	321353	60403	60403	0.181190513
2017	122792	295711	35034	35034	0.106828351
2018	191513	267619	40683	40683	0.139287092
2019	346725	229399	30038	30038	0.122982874
2020	1286453	260281	36099	36099	0.140464022
2021	571995	377115

Custom reference points

CustomRefPointName	CustomRefPointValue	CustomRefPointNotes
custom1
custom2
custom3
custom4
custom5

Custom fish data column names

CustomName1	CustomName2
F (5-10)	B 4+

Custom fish data

Year	Custom1	Custom2
1987	0.347354854	415358
1988	0.265669054	452286
1989	0.322395741	401085
1990	0.399685558	371473
1991	0.435886673	310169
1992	0.415071593	349462
1993	0.248105798	453585
1994	0.312423633	460617
1995	0.34345992	435353
1996	0.360778139	322252
1997	0.250105448	266621
1998	0.279865412	323347
1999	0.377169481	296830
2000	0.335008888	324051
2001	0.414624826	282333
2002	0.418241729	277647
2003	0.279741226	410920
2004	0.244326032	516049
2005	0.252913058	536907
2006	0.143650054	646197
2007	0.321804278	595421
2008	0.310411717	592696
2009	0.088459052	543393
2010	0.100736456	506777
2011	0.125957522	475606
2012	0.20735224	456770
2013	0.175201936	398658
2014	0.296050305	433879
2015	0.240477129	364131
2016	0.216185062	333279
2017	0.115958551	326178
2018	0.170558683	292279
2019	0.150557358	243846
2020	0.228367351	256697
2021		481594

Sensivity data