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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:
2019
Key:
12855
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
0.932266613661341
2.2291989567552
3.71828339993957
4499
6427
0.349099708112947
0.711356606350608
1.39176516198727
1986
0.869851590395897
1.59112327414533
2.24004495504495
2858
4051
0.299675641920773
0.543763235892687
0.920934164963698
1987
0.88024467437262
1.49509496833416
2.08376213481411
4614
6488
0.531822287344315
0.953863976084791
1.57635595712371
1988
0.813494174315168
1.40702542048436
2.11060237709346
5212
7273
0.592877582061998
1.16659667146533
1.90619193787182
1989
0.675286668630991
1.12889749746802
1.61320638066104
3451
4778
0.457521460120162
0.89076940065015
1.42492626990528
1990
0.65608691117136
1.03211803118073
1.44560949855779
3047
4187
0.44158633871163
0.834650372123451
1.3057168268117
1991
0.625940593261539
0.970128938262709
1.32256196014254
3310
4514
0.528015805417826
0.958509643237494
1.46790051594419
1992
0.620461235006118
1.02433341152667
1.42105358471121
3574
4837
0.542873393999073
0.985427544492697
1.57411586205297
1993
0.669806896442454
1.10159612659998
1.5543924555017
3802
5107
0.520081018833003
0.978359837801587
1.54049365097004
1994
0.714577747670045
1.20938442397861
1.76410015832908
3900
5200
0.452881796726834
0.924017715625744
1.49611515331765
1995
0.721364003135469
1.23110543630461
1.82765828297622
4670
6181
0.524458455467098
1.10436207896313
1.77132374087729
1996
0.684817769863827
1.19305660092718
1.90000810031312
5253
6902
0.604524825821834
1.30797345868714
2.10000198716087
1997
0.608898439103725
1.00059540653978
1.42474200714103
4856
6334
0.648472611369043
1.39492673889346
2.20196297970785
1998
0.571146397773968
0.955547183468162
1.40252339729092
4253
5507
0.592584109126494
1.25586735090172
2.02152863354816
1999
0.546270040757763
0.926328983608528
1.45603739881342
3759
4833
0.486757820204094
1.12431043324983
1.80342402150463
2000
0.519616893880844
0.861535231330848
1.30476710250493
3494
4460
0.502646081629348
1.10168721652677
1.76031201101995
2001
0.481809642260223
0.792327522042471
1.14068860936227
3571
4527
0.600636707249583
1.21108395122092
1.98266042795668
2002
0.471382840951548
0.812361349364296
1.20220914021512
2803
3528
0.411300334272936
0.892055752513169
1.43702133815345
2003
0.489354858223212
0.84545886238114
1.27335960037747
2369
2961
0.328290930810862
0.712643511654235
1.17559402269099
2004
0.494638545756454
0.849968118188629
1.24359357687493
2067
2566
0.289014967581764
0.601783090677136
0.965636759244502
2005
0.529277693348186
0.844144731243779
1.14736381574818
1527
1883
0.2308468114557
0.42729925650676
0.683573719554793
2006
0.576929120537641
0.960660807557176
1.28984174262583
2054
2515
0.283338714342976
0.512862303868283
0.824015861890341
2007
0.663346833857883
1.09992052958355
1.51536800498699
2348
2856
0.288676968317901
0.517493329021646
0.809151651836198
2008
0.7184106098602
1.22248439517648
1.69797045129968
2894
3496
0.321487496775192
0.584013297692433
0.935225461870032
2009
0.821950007756033
1.33927816162212
1.86091066843258
2871
3445
0.287772838986903
0.529060833907887
0.830666426613043
2010
0.859070821939855
1.35266429754001
1.82692828811917
3197
3811
0.329068877538672
0.579537965645329
0.909686923208669
2011
0.871605952147312
1.39220807494545
1.91667231976612
3257
3857
0.326127628313205
0.57129742688311
0.879702935096424
2012
0.954277327902206
1.50566531403023
2.1181720216722
2545
3186
0.240559973508468
0.435750046176538
0.674361712359514
2013
1.03359554409962
1.71931919451643
2.50747229089036
2737
3064
327
0.205875790327951
0.376507478496719
0.586846345989333
2014
1.06999933876403
1.71741589704516
2.42557786136351
2500
2809
309
0.190007849469876
0.342210022167628
0.534483014213569
2015
1.0062577351661
1.59260636207507
2.12393103101774
2471
2623
152
0.205709133856935
0.336579683978412
0.509314105849332
2016
1.12284168989987
1.68352520048627
2.24498768198038
2792
2959
167
0.216767533090917
0.363631956075269
0.539681938378443
2017
1.21147907756453
1.85327533969227
2.6242500385471
2594
2788
193
0.174918454693316
0.318242553447355
0.483897493093117
2018
1.15387021157027
1.68102612332481
2.19810543462782
3003
3258
255
0.239823056937295
0.402037950700065
0.590846673723222
Custom reference points
CustomRefPointName
CustomRefPointValue
CustomRefPointNotes
custom1
custom2
custom3
custom4
custom5
Custom fish data column names
Custom fish data
Sensivity data
