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Stock Assessment Graphs
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Witch (Glyptocephalus cynoglossus) in Subarea 4 and divisions 3.a and 7.d (North Sea, Skagerrak and Kattegat, eastern English Channel)
Species:
Stock Assessment Graphs
Stock code:
wit.27.3a47d
Assessment Year:
2021
Key:
16770
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
F
MP
MSY approach
MSYB
trigger
4381
F
MSY
0.147
Precautionary approach
B
lim
3077
B
pa
4381
F
lim
0.321
F
pa
0.277
Age and Length
Recruitment
1
F
4-8
Fish data
Year
Low Recruitment
Recruitment
High Recruitment
Low SSB
SSB
High SSB
Landings
Catches
Discards
Low F
F
High F
1950
17851
29065
47324
1794
3881
8397
2379
0.141
0.27
0.519
1951
18612
29811
47749
1728
3778
8258
2568
0.146
0.282
0.547
1952
20363
32116
50654
1610
3609
8092
2554
0.145
0.288
0.57
1953
22191
34617
54000
1485
3443
7983
2263
0.134
0.275
0.563
1954
22441
35344
55666
1424
3372
7984
1590
0.116
0.245
0.517
1955
20878
33673
54310
1427
3388
8044
2027
0.121
0.252
0.527
1956
18006
29653
48833
1468
3435
8042
1936
0.122
0.252
0.52
1957
15352
25612
42730
1540
3504
7977
1991
0.129
0.26
0.521
1958
13862
22818
37561
1574
3498
7772
2678
0.149
0.289
0.561
1959
12954
21057
34230
1531
3374
7435
2333
0.154
0.298
0.576
1960
11729
19398
32081
1410
3154
7053
2563
0.162
0.314
0.612
1961
10454
17572
29535
1253
2889
6664
2093
0.151
0.303
0.606
1962
9451
15838
26542
1133
2679
6333
1419
0.134
0.274
0.561
1963
8554
14422
24317
1043
2501
5999
1523
0.138
0.283
0.577
1964
7576
13149
22822
933
2281
5575
1760
0.15
0.307
0.631
1965
6971
12349
21873
819
2047
5118
1356
0.143
0.301
0.633
1966
7262
12632
21974
722
1847
4725
1137
0.137
0.294
0.632
1967
8617
14375
23981
633
1668
4400
1125
0.137
0.303
0.667
1968
11265
17980
28696
544
1502
4152
1174
0.136
0.312
0.717
1969
13881
21948
34704
479
1388
4016
891
0.116
0.282
0.685
1970
15656
25069
40142
471
1374
4011
597
0.096
0.24
0.6
1971
16138
25927
41656
515
1452
4094
843
0.102
0.247
0.596
1972
16108
26222
42688
601
1592
4217
908
0.11
0.254
0.585
1973
16100
26270
42863
711
1764
4375
1494
0.131
0.282
0.606
1974
16583
27101
44290
827
1943
4562
1138
0.129
0.272
0.574
1975
18170
29507
47917
922
2098
4770
1841
0.147
0.296
0.598
1976
21413
34091
54277
983
2206
4952
1496
0.142
0.286
0.576
1977
27017
41829
64762
1037
2317
5175
1618
0.142
0.283
0.566
1978
33390
50905
77608
1102
2445
5423
1664
0.139
0.276
0.548
1979
37200
58106
90761
1221
2644
5730
1572
0.134
0.263
0.514
1980
37735
60432
96782
1427
2949
6095
1883
0.14
0.262
0.493
1981
36726
58930
94557
1746
3370
6501
1933
0.147
0.262
0.467
1982
35627
56863
90757
2144
3834
6857
3155
0.18
0.296
0.485
1983
35300
55891
88492
2515
4209
7044
3606
0.204
0.318
0.496
1984
36650
57238
89390
2771
4438
7110
3903
0.218
0.332
0.505
1985
37790
58287
89900
2893
4537
7116
3979
0.222
0.334
0.502
1986
37348
58026
90152
2949
4586
7132
3579
0.217
0.324
0.484
1987
34304
54234
85743
2995
4634
7171
3700
0.214
0.319
0.475
1988
30840
49434
79238
3074
4715
7231
3290
0.208
0.306
0.451
1989
28598
45694
73011
3176
4801
7256
3841
0.216
0.312
0.452
1990
28636
44958
70584
3233
4806
7143
3862
0.22
0.313
0.447
1991
30087
46234
71045
3244
4751
6958
3641
0.215
0.304
0.43
1992
32699
49519
74993
3223
4672
6773
3164
0.202
0.286
0.404
1993
34505
52277
79204
3215
4638
6691
2673
0.187
0.266
0.377
1994
35224
54223
83471
3238
4661
6709
2696
0.183
0.259
0.368
1995
35191
54388
84056
3299
4739
6807
2810
0.183
0.26
0.369
1996
35124
53757
82273
3376
4832
6915
2790
0.189
0.267
0.379
1997
33842
51498
78363
3408
4873
6969
3494
0.211
0.298
0.422
1998
31579
48392
74156
3309
4766
6863
3786
0.233
0.333
0.476
1999
28987
44815
69284
3082
4509
6598
4024
0.258
0.372
0.537
2000
27632
42720
66044
2773
4124
6134
4422
0.287
0.415
0.6
2001
29088
43621
65416
2473
3690
5506
4206
0.309
0.441
0.629
2002
29471
43110
63060
2225
3272
4811
3813
0.325
0.455
0.638
2003
27065
38816
55668
2069
2937
4168
3308
0.335
0.455
0.618
2004
21001
29631
41807
1999
2698
3641
3059
0.344
0.451
0.591
2005
18329
25439
35306
2008
2566
3280
2960
0.344
0.434
0.548
2006
21017
27796
36762
2052
2510
3070
2335
0.32
0.392
0.48
2007
17908
24932
34712
2083
2473
2936
2271
0.307
0.37
0.446
2008
30140
38313
48702
2035
2378
2779
1999
0.299
0.361
0.435
2009
46115
58489
74182
1893
2209
2577
1894
2303
408.9
0.305
0.37
0.45
2010
40744
51592
65329
1866
2188
2566
1550
2074
523.6
0.262
0.322
0.396
2011
27144
34908
44892
2073
2432
2851
1772
2220
447.8
0.202
0.253
0.317
2012
25613
32987
42485
2470
2891
3384
2153
2600
446.6
0.178
0.224
0.283
2013
28393
36634
47265
2989
3512
4125
2033
2258
225.4
0.185
0.231
0.289
2014
25000
32553
42388
3327
3958
4709
2741
2992
251.3
0.217
0.272
0.34
2015
18357
24529
32776
3400
4119
4990
2363
2762
399.2
0.204
0.257
0.323
2016
15030
21361
30359
3366
4165
5153
3025
3312
286.8
0.203
0.259
0.331
2017
22750
32642
46835
3219
4117
5266
3360
3509
149.8
0.221
0.291
0.382
2018
23615
36419
56167
2917
3930
5294
3141
3293
151.5
0.21
0.291
0.404
2019
29218
48472
80414
2535
3643
5237
2707
2890
183.1
0.202
0.295
0.43
2020
22700
42309
78854
2222
3415
5247
1980
2164
184.1
0.18
0.279
0.434
2021
36419
3562
Custom reference points
Custom fish data column names
Custom fish data
Sensivity data