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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:
2020
Key:
13549
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
4745
F
MSY
0.154
Precautionary approach
B
lim
3069
B
pa
4745
F
lim
0.3
F
pa
0.2
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
14012.463
26092.053
48584.978
1729.518
3586.391
7436.869
2379
0.159
0.289
0.528
1951
14817.867
27043.967
49357.719
1704.66
3539.122
7347.732
2568
0.164
0.301
0.552
1952
16588.635
30070.69
54509.993
1600.922
3378.119
7128.197
2554
0.167
0.31
0.575
1953
18818.764
33611.02
60030.547
1431.339
3108.901
6752.608
2263
0.159
0.303
0.578
1954
19851.913
35467.683
63367.018
1296.166
2870.175
6355.594
1590
0.142
0.278
0.543
1955
18567.467
33889.208
61854.34
1287.363
2873.303
6413.009
2027
0.149
0.292
0.569
1956
15267.262
28582.373
53510.056
1310.436
2899.377
6414.953
1936
0.148
0.289
0.565
1957
12326.272
23516.51
44865.654
1389.407
3015.508
6544.729
1991
0.151
0.291
0.562
1958
11085.954
20808.424
39057.576
1486.843
3172.138
6767.67
2678
0.166
0.314
0.593
1959
10995.031
20107.747
36773.111
1476.708
3133.449
6648.913
2333
0.167
0.315
0.596
1960
10236.841
19119.624
35710.237
1382.154
2989.704
6466.956
2563
0.174
0.33
0.629
1961
8987.134
17021.009
32236.611
1188.982
2676.455
6024.826
2093
0.165
0.323
0.63
1962
8105.564
15159.131
28350.805
1027.551
2384.36
5532.742
1419
0.148
0.295
0.589
1963
7433.322
13898.288
25986.014
960.301
2253.882
5289.994
1523
0.154
0.306
0.606
1964
6374.299
12278.625
23651.956
899.745
2120.987
4999.849
1760
0.167
0.33
0.65
1965
5491.864
10724.16
20941.451
795.872
1879.089
4436.615
1356
0.161
0.322
0.64
1966
5552.022
10601.088
20241.825
704.966
1673.79
3974.052
1137
0.157
0.314
0.629
1967
6806.833
12460.875
22811.403
640.085
1525.875
3637.478
1125
0.163
0.325
0.649
1968
9554.078
16976.277
30164.498
568.458
1377.188
3336.477
1174
0.17
0.342
0.689
1969
12224.152
21685.433
38469.58
482.318
1195.652
2963.982
891
0.156
0.323
0.67
1970
13709.394
24555.196
43981.348
443.15
1095.113
2706.248
597
0.135
0.285
0.602
1971
13808.643
24666.601
44062.343
487.682
1164.944
2782.745
843
0.144
0.297
0.614
1972
13586.922
24574.078
44446.073
587.465
1324.885
2987.958
908
0.147
0.296
0.597
1973
13458.755
24317.663
43937.847
731.723
1580.015
3411.736
1494
0.161
0.314
0.613
1974
13654.491
24791.209
45011.125
841.24
1761.806
3689.743
1138
0.152
0.293
0.567
1975
14702.81
26682.188
48421.979
964.778
1989.003
4100.562
1841
0.167
0.314
0.59
1976
17132.174
30813.617
55420.812
1007.236
2065.321
4234.907
1496
0.162
0.302
0.563
1977
22076.81
39048.382
69066.87
1055.44
2159.028
4416.551
1618
0.164
0.302
0.556
1978
28994.522
50079.197
86496.547
1101.768
2238.098
4546.407
1664
0.166
0.3
0.545
1979
33291.801
58532.828
102910.984
1183.476
2353.872
4681.729
1572
0.162
0.29
0.519
1980
33301.802
59533.693
106428.496
1367.039
2613.552
4996.68
1883
0.167
0.29
0.505
1981
31371.995
56338.361
101173.385
1678.653
3033.229
5480.87
1933
0.168
0.283
0.475
1982
29682.772
53335.758
95836.839
2179.731
3714.602
6330.263
3155
0.192
0.305
0.486
1983
28927.315
51849.539
92935.504
2658.7
4305.408
6972.03
3606
0.205
0.315
0.484
1984
30278.422
53591.255
94853.775
2936.422
4630.557
7302.103
3903
0.213
0.32
0.482
1985
31885.168
55711.137
97340.894
3052.765
4773.985
7465.668
3979
0.215
0.32
0.476
1986
31739.393
55875.161
98364.631
3086.278
4815.832
7514.631
3579
0.21
0.31
0.459
1987
28478.259
50964.664
91206.312
3104.781
4846.791
7566.197
3700
0.209
0.308
0.455
1988
24882.031
45160.763
81966.558
3146.735
4877.009
7558.698
3290
0.202
0.296
0.432
1989
22692.857
41189.275
74761.689
3343.25
5119.65
7839.921
3841
0.207
0.299
0.432
1990
22851.098
41001.258
73567.72
3453.835
5204.374
7842.155
3862
0.208
0.296
0.422
1991
24252.242
43041.905
76389.046
3505.654
5205.196
7728.679
3641
0.202
0.285
0.403
1992
26723.144
46962.127
82529.264
3424.349
5041.899
7423.527
3164
0.191
0.269
0.379
1993
28471.937
49993.406
87782.598
3326.375
4890.646
7190.535
2673
0.179
0.253
0.358
1994
29065.063
51692.848
91936.859
3270.759
4803.213
7053.67
2696
0.178
0.252
0.356
1995
28890.192
51325.938
91184.991
3343.15
4910.982
7214.077
2810
0.18
0.254
0.36
1996
28802.071
50609.823
88929.514
3404.321
4971.938
7261.41
2790
0.184
0.26
0.368
1997
27545.139
48402.431
85052.949
3520.688
5137.45
7496.658
3494
0.203
0.286
0.405
1998
25451.681
45209.249
80304.172
3440.793
5059.592
7439.992
3786
0.222
0.316
0.45
1999
23176.373
41633.433
74789.216
3211.231
4812.1
7211.038
4024
0.243
0.35
0.505
2000
22090.716
39745.197
71508.804
2907.897
4453.988
6822.117
4422
0.268
0.39
0.565
2001
23952.474
41347.078
71373.876
2637.705
4068.424
6275.181
4206
0.286
0.412
0.593
2002
23677.69
40282.688
68532.652
2351.684
3613.052
5550.977
3812.681
5341.463
1528.781
0.299
0.423
0.601
2003
21215.182
35666.976
59963.339
2154.505
3222.653
4820.359
3307.901
3657.073
349.171
0.308
0.425
0.585
2004
16629.86
27864.384
46688.541
2020.583
2894.547
4146.528
3058.738
3428.049
369.31
0.319
0.425
0.566
2005
14466.62
24109.013
40178.321
2005.646
2723.857
3699.254
2960.375
3379.351
418.976
0.322
0.414
0.533
2006
15659.302
25321.78
40946.43
2012.643
2608.652
3381.16
2335.18
2630.859
295.679
0.3
0.376
0.471
2007
13774.404
22939.47
38202.69
2071.15
2607.772
3283.43
2271.031
2470.483
199.451
0.286
0.355
0.44
2008
31839.005
48201.735
72973.613
2020.882
2515.983
3132.381
1999.349
2316.942
317.593
0.278
0.346
0.431
2009
61466.569
89970.344
131692.119
1818.78
2293.687
2892.598
1863.351
2318.525
455.174
0.284
0.359
0.454
2010
58314.713
86319.188
127772.254
1731.156
2220.106
2847.157
1531.068
2090.389
559.321
0.245
0.316
0.407
2011
28243.038
42215.587
63100.709
2019.682
2621.486
3402.608
1567.264
2114.192
546.927
0.179
0.238
0.315
2012
21820.14
32683.085
48954.043
2619.776
3440.582
4518.555
1952.007
2506.519
554.511
0.15
0.203
0.274
2013
22784.362
34382.268
51883.847
3329.044
4450.711
5950.305
2013.302
2267.414
254.111
0.14
0.192
0.262
2014
22351.406
34253.487
52493.405
3995.314
5448.296
7429.686
2685.327
2992.196
306.868
0.152
0.207
0.283
2015
14457.035
22471.202
34927.971
4055.794
5641.844
7848.132
2240.222
2689.697
449.474
0.14
0.196
0.274
2016
8262.723
13405.876
21750.396
4154.335
5910.388
8408.732
2744.35
3134.77
390.419
0.132
0.189
0.27
2017
14819.653
24698.733
41163.407
4222.803
6217.403
9154.132
2849.893
3085.543
235.5643
0.14
0.204
0.297
2018
10509.394
18468.891
32456.67
4067.032
6275.709
9683.847
3010.094
3209.182
198.709
0.126
0.192
0.292
2019
18652.267
36285.063
70586.902
3642.161
5992.786
9860.487
2579.683
2796.673
215.901
0.128
0.202
0.318
2020
24698.733
5598.244
Custom reference points
CustomRefPointName
CustomRefPointValue
CustomRefPointNotes
custom1
custom2
custom3
custom4
custom5
Custom fish data column names
CustomName1
BMS
Custom fish data
Year
Custom1
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
0.0847
2018
0.378
2019
1.09
2020
Sensivity data