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Stock Assessment Graphs
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Megrim (Lepidorhombus spp.) in divisions 4.a and 6.a (northern North Sea, West of Scotland)
Species:
Stock Assessment Graphs
Stock code:
lez.27.4a6a
Assessment Year:
2021
Key:
14538
Unit weights
tonnes
Unit recruitment
thousands
Fishing pressure description
F/Fmsy
Fishing pressure units
ratio
Stock size description
B/Bmsy
Stock size units
ratio
Fish reference points
Management plan
SSB
MP
F
MP
MSY approach
MSYB
trigger
0.5
F
MSY
1
Precautionary approach
B
lim
0.3
B
pa
0.5
F
lim
F
pa
Age and Length
Recruitment
0
F
Fish data
Year
Low SSB
SSB
High SSB
Landings
Catches
Discards
Low F
F
High F
1985
1.14291186040662
2.35371853312902
3.68346968021138
4499
6427
1928
0.367237569901574
0.669104313509319
1.20088814989653
1986
1.03408517823775
1.64738206094854
2.27546141546591
2858
4051
1193
0.31564594868131
0.527921486871143
0.843813162867187
1987
1.00615123372229
1.54448119337791
2.07476579732886
4614
6488
1874
0.551781284928382
0.930164863057251
1.38020907307243
1988
0.914390856614883
1.44137831135381
2.03760719917602
5212
7273
2061
0.645654793199729
1.14172717871408
1.74007206599382
1989
0.768321349680305
1.16422685176681
1.61920499438855
3451
4778
1327
0.495659745598749
0.870165424938355
1.34287269879429
1990
0.716397903080248
1.06340224122281
1.46492885780925
3047
4187
1140
0.460014967935945
0.817641548452654
1.28183963813046
1991
0.681659721707933
0.997133622612202
1.3739991754149
3310
4514
1204
0.527843427784429
0.945026514577105
1.43543839702826
1992
0.701193696028769
1.05488482718322
1.47798601261799
3574
4837
1263
0.529905738702758
0.968556322572066
1.49023464538687
1993
0.756929473131833
1.13391218904704
1.59872465552438
3802
5107
1305
0.53848944636331
0.960255993951189
1.46221064410554
1994
0.824836181670963
1.24593943753524
1.79305735904712
3900
5200
1300
0.479674525229842
0.901074932788802
1.35880553154834
1995
0.828932885313042
1.27159884519173
1.87721892888337
4670
6181
1511
0.563945733361679
1.07472616183659
1.63532620668331
1996
0.788445298105804
1.22896869239124
1.85349456920779
5253
6902
1649
0.622148567112336
1.27026723658981
1.98692834562461
1997
0.695052363050483
1.029302418946
1.45521445428997
4856
6334
1478
0.713089629678299
1.36537895258817
2.11319895145946
1998
0.658394628231711
0.986195123256516
1.41491914670723
4253
5507
1254
0.617617352262362
1.21797953199542
1.85363959464073
1999
0.619371096521165
0.952510229415668
1.38344479297507
3759
4833
1074
0.547696172947347
1.09262783224326
1.67906316879839
2000
0.577754831722213
0.891170498183196
1.30543641285493
3494
4460
966
0.537466742676215
1.06349461456742
1.65066075483099
2001
0.54969960583951
0.824349020293965
1.16772871410707
3571
4527
956
0.61178650185051
1.16813538897141
1.78237462446245
2002
0.53616319029373
0.846390257287927
1.22748178857695
2803
3528
725
0.42929459152092
0.862278917755266
1.36609247568505
2003
0.561335671807594
0.882035465661001
1.31517534696235
2369
2961
592
0.338348486273607
0.68395068857612
1.08774217122968
2004
0.584042300478479
0.883689351512615
1.27861721830352
2067
2566
499
0.300677516189423
0.579499344040216
0.90277215071541
2005
0.617042493471669
0.884259070430997
1.18426587873173
1527
1883
356
0.2380606231772
0.411127648946202
0.635225945736279
2006
0.691545815668838
1.00739550057458
1.34166966532069
2054
2515
461
0.285293916611447
0.494455043832169
0.787537853167905
2007
0.796027375287581
1.15228246264169
1.5482874536275
2348
2856
508
0.283649838085017
0.499864521111788
0.772141256673378
2008
0.908523437723816
1.28287104842104
1.70668305335472
2894
3496
602
0.332616571094065
0.561711050726113
0.855926252230809
2009
0.97075269326135
1.40273019257642
1.86062895748277
2871
3445
574
0.2961768790874
0.510396739052996
0.772109640099241
2010
0.991544740792479
1.41611512119628
1.86447503259697
3197
3811
614
0.328194595655755
0.561679256032004
0.845898826935947
2011
1.03562437647054
1.45534298651367
1.93978893919002
3257
3857
600
0.344611219889853
0.554815961788051
0.853684034236954
2012
1.12810021447598
1.57521012284087
2.12936801051561
2545
3186
449
0.255893102169841
0.42317585255506
0.64125323884656
2013
1.22990468673624
1.782967323539
2.49480025391059
2737
3064
327
0.211139102220265
0.366896033510256
0.549535997517615
2014
1.25091420446461
1.79201436616563
2.46406159667913
2500
2809
309
0.200648093980123
0.332525725634022
0.509064580755233
2015
1.20935428613987
1.66377391772395
2.16542584143885
2471
2623
152
0.204755903347101
0.327104374836555
0.471379524716177
2016
1.26629157677725
1.75259608741418
2.31754163434777
2792
2959
167
0.220144972366439
0.35538612416456
0.520071640030573
2017
1.36087963248124
1.89872706054223
2.74493771750804
2594
2788
193
0.185264814529618
0.315589500124899
0.461644477600703
2018
1.20175284182858
1.69276063390409
2.24111392028925
3003
3258
255
0.249860539980454
0.405399103732741
0.604429237302207
2019
1.09984213638148
1.55600305408902
2.01735306285478
3197
3381
184
0.27539935283798
0.453403665384428
0.671716420409423
2020
1.06942952302145
1.56320370476998
2.08987417215852
3316
3530
214
0.289323106204275
0.474507409313312
0.74391728441371
2021
0.965500223758142
1.4650100711498
2.06775485967176
Custom reference points
CustomRefPointName
CustomRefPointValue
CustomRefPointNotes
custom1
custom2
custom3
custom4
custom5
Custom fish data column names
Custom fish data
Sensivity data
