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Stock Assessment Graphs
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Norway lobster (Nephrops norvegicus) in Division 4.b, Functional Unit 8 (central North Sea, Firth of Forth)
Species:
Stock Assessment Graphs
Stock code:
nep.fu.8
Assessment Year:
2017
Key:
9246
Unit weights
tonnes
Unit recruitment
thousands
Fishing pressure description
Harvest Rate
Fishing pressure units
%
Stock size description
UW TV index
Stock size units
individuals
Fish reference points
Management plan
SSB
MP
F
MP
MSY approach
MSYB
trigger
292
F
MSY
16.3
Precautionary approach
B
lim
B
pa
F
lim
F
pa
Age and Length
Recruitment
0
F
Fish data
Year
Low SSB
SSB
High SSB
Landings
Discards
Low F
F
High F
1993
413
555
697
2368
567
19.2
24.1
32.4
1994
370
448
526
1850
1584
43.7
51.3
62.2
1995
1762
620
1996
287
375
463
1687
930
30.2
37.3
48.8
1997
2193
494
1998
211
292
373
2144
578
43.7
55.7
77.3
1999
385
463
541
2207
938
33.8
39.6
47.5
2000
373
443
513
1785
1032
29.2
33.7
40.2
2001
340
419
498
1527
436
21.3
25.3
31.2
2002
389
508
627
1340
421
17.1
21.1
27.5
2003
629
767
905
1127
546
10.5
12.4
15.1
2004
490
630
770
1657
406
13.4
16.4
21
2005
567
710
853
1989
602
16.2
19.4
24.3
2006
701
827
953
2458
1510
23.2
26.7
31.5
2007
560
692
824
2651
614
19.3
22.9
28.4
2008
584
881
1178
2450
796
15.8
21.1
31.8
2009
590
732
874
2663
573
21.7
26
32.2
2010
535
682
829
1950
407
15.8
19.2
24.5
2011
446
533
620
1889
231
19
22.1
26.5
2012
458
522
586
2129
379
22
24.6
28.2
2013
542
668
794
1503
301
13.1
15.6
19.2
2014
348
428
508
2371
353
24.4
29.1
35.6
2015
537
664
791
1897
311
14.2
16.8
20.9
2016
651
797
943
1935
165
10.4
12.3
15.1
2017
537
670
803
Custom reference points
Custom fish data column names
Custom fish data
Sensivity data