the cod day marine laboratory, aberdeen, 2 october 2012 the cod day - science coby needle, nick...
TRANSCRIPT
![Page 1: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/1.jpg)
The Cod DayMarine Laboratory, Aberdeen, 2 October 2012
The Cod Day - Science
Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes
Marine Laboratory
Aberdeen
![Page 2: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/2.jpg)
Outline
• North Sea cod• West of Scotland cod• Future developments
![Page 3: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/3.jpg)
North Sea cod – Outline
• Data– Stock area– Catch data– Survey data– Stock distribution– Value estimates– Sampling and observer coverage– Biological data
• Assessment• Advice
![Page 4: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/4.jpg)
North Sea cod – stock area
![Page 5: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/5.jpg)
North Sea cod – official landings
Belgium2%
Denmark18%
France2%
Germany8%
Netherlands7%
Norway18%
Sweden1%
Scotland36%
England & Wales8%
![Page 6: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/6.jpg)
North Sea cod – Int. effort
TR1 = Trawl gear with mesh ≥ 100mm
![Page 7: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/7.jpg)
North Sea cod – Int. effort
TR2 = Trawl gear with mesh ≥ 70mm & < 100mm
![Page 8: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/8.jpg)
North Sea cod – Int. effort
GN = Gill nets & entangling nets
![Page 9: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/9.jpg)
Reg. gear 2011
TR1 68.8%
TR2 11.6%
GN 10.8%
BT2 5.2%
BT1 1.6%
GT 1.3%
LL 0.7%
TR3 V small %
North Sea cod – Int. cod catch
![Page 10: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/10.jpg)
North Sea cod – catches
2011 Removals = 67 ktLandings = 35 kt (52%), discards = 11.7 kt (17%), unaccounted = 20.3 kt
Unaccounted
Discards
Landings
![Page 11: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/11.jpg)
North Sea cod – surveys
• Available surveys:– IBTS Q1 1983-2012– IBTS Q3 1991-2011– ScoGFS Q3 1982-2011– EngGFS Q3 1992-2011– North Sea Commission Fishers’ Survey
• Only IBTS Q1 used in assessment– Possible changes in catchability in Q3– Fishers’ Survey not quantitative
![Page 12: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/12.jpg)
North Sea cod – surveys
IBTS Q1
2008 age 1 2009 age 1 2010 age 1 2011 age 1 2012 age 1
2008 age 2 2009 age 2 2010 age 2 2011 age 2 2012 age 2
2008 age 3+ 2009 age 3+ 2010 age 3+ 2011 age 3+ 2012 age 3+
![Page 13: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/13.jpg)
North Sea cod – surveys
IBTS Q1
![Page 14: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/14.jpg)
North Sea cod – surveys
North SeaCommission
Fishers’Survey 2011
![Page 15: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/15.jpg)
North Sea cod – modelled abundance distribution
![Page 16: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/16.jpg)
North Sea cod – modelled abundance distribution
![Page 17: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/17.jpg)
North Sea cod – modelled abundance distribution
![Page 18: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/18.jpg)
North Sea cod – modelled abundance distribution
![Page 19: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/19.jpg)
North Sea cod – modelled abundance distribution
![Page 20: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/20.jpg)
North Sea cod – modelled abundance distribution
![Page 21: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/21.jpg)
North Sea cod – VMS-based landings distribution
4°E0°4°W8°W12°W
62°N
58°N
54°N
50°N
Cod LPUE 2007
Legend
kg year
0 - 5,000
5,001 - 15,000
15,001 - 30,000
30,001 - 45,000
45,001 - 75,000
75,001 - 125,000
125,001 - 270,000
![Page 22: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/22.jpg)
North Sea cod – VMS-based landings distribution
4°E0°4°W8°W12°W
62°N
58°N
54°N
50°N
Cod LPUE 2008
Legend
kg year
0 - 5,000
5,001 - 15,000
15,001 - 30,000
30,001 - 45,000
45,001 - 75,000
75,001 - 125,000
125,001 - 270,000
![Page 23: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/23.jpg)
North Sea cod – VMS-based landings distribution
4°E0°4°W8°W12°W
62°N
58°N
54°N
50°N
Cod LPUE 2009
Legend
kg year
0 - 5,000
5,001 - 15,000
15,001 - 30,000
30,001 - 45,000
45,001 - 75,000
75,001 - 125,000
125,001 - 270,000
![Page 24: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/24.jpg)
North Sea cod – VMS-based landings distribution
4°E0°4°W8°W12°W
62°N
58°N
54°N
50°N
Cod LPUE 2010
Legend
kg year
0 - 5,000
5,001 - 15,000
15,001 - 30,000
30,001 - 45,000
45,001 - 75,000
75,001 - 125,000
125,001 - 270,000
![Page 25: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/25.jpg)
North Sea cod – VMS-based landings distribution
4°E0°4°W8°W12°W
62°N
58°N
54°N
50°N
Cod LPUE 2011
Legend
kg year
0 - 5,000
5,001 - 15,000
15,001 - 30,000
30,001 - 45,000
45,001 - 75,000
75,001 - 125,000
125,001 - 270,000
![Page 26: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/26.jpg)
North Sea cod – observer coverage 2011
Fleet Declared landings (tonnes)
Number of trips sampled
Discard weight (tonnes)
Discard rate
All 10505 39 3414 24.5%
TR1 (whitefish)
10228 28 2529 19.8%
TR2 (Nephrops)
222 11 885 79.9%
![Page 27: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/27.jpg)
North Sea cod – observer coverage 2011
![Page 28: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/28.jpg)
North Sea cod – observer coverage 2011
![Page 29: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/29.jpg)
North Sea cod – observer coverage 2011
![Page 30: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/30.jpg)
North Sea cod – port sampling coverage 2011
Fleet Declared landings (tonnes)
Number of trips
Number of trips sampled
Number of fish measured
Number of otoliths taken
All 10773 5180 39 10205 4546
![Page 31: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/31.jpg)
North Sea cod – mean weight-at-age in catches
0
2
4
6
8
10
12
14
16
1960 1970 1980 1990 2000 2010
kg
Mean weights-at-age in stock/catch
Age 1
Age 2
Age 3
Age 4
Age 5
Age 6
Age 7
Age 8
Age 9
![Page 32: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/32.jpg)
North Sea cod – natural mortality estimates
0.000
0.200
0.400
0.600
0.800
1.000
1.200
1.400
1958 1968 1978 1988 1998 2008 2018
Age 1
Age 2
Age 3
Age 4
Age 5
![Page 33: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/33.jpg)
North Sea cod – maturity estimates
0
0.2
0.4
0.6
0.8
1
1.2
0 1 2 3 4 5 6 7
Age
Pro
port
ion
mat
ure
![Page 34: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/34.jpg)
North Sea cod – assessment
• Assessed using the SAM method– Includes IBTS Q1 survey, landings, discards– Landings and discards from 1993-2011 are
scaled by an estimated parameter– Indicates unaccounted removals
• SAM is a robust approach and is increasingly widely used at ICES– SAM: NS cod, western Baltic plaice, NS sole,
Kattegat cod, NS herring– TSA: Cod VIa, haddock VIa
![Page 35: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/35.jpg)
North Sea cod – assessment
![Page 36: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/36.jpg)
North Sea cod – assessment
Fmp
![Page 37: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/37.jpg)
North Sea cod – assessment
![Page 38: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/38.jpg)
North Sea cod – assessment
Removals
![Page 39: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/39.jpg)
North Sea cod – assessment
Removals multiplier
![Page 40: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/40.jpg)
North Sea cod – forecasts & advice (June 2012)
• Reduce F in steps from 2008 onwards:– 2009 F = 75% 2008 F– 2010 F = 65% 2008 F– 2011 F = 55% 2008 F– And so on…
• Most recent estimate of 2008 F used at each step.
• Apply sliding-F rule:
Management plan has two phases:
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0 50 100 150 200
SSB at start of current year (000 tonnes)
Targ
et F
Blim Bpa
#1 used until suggested TAC is lower than that from #2,or F = 0.4 for three years
![Page 41: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/41.jpg)
North Sea cod – forecasts & advice (June 2012)
• For both management plan phases:– Maximum effort reduced in line with F (but with bycatch rules).– ± 20% constraint on annual quota changes.– Forecasts based on estimate total removals, which are then split
into:• Landings (quota).• Discards.• Unaccounted removals.
• Other Articles relevant also, e.g.:– Article 9: data-poor situations.– Article 10: different approach if recovery not working.– Article 13: derogations to reduce effort cuts.
![Page 42: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/42.jpg)
North Sea cod – forecasts & advice (June 2012)
• MSY:– F(msy)
• MSY framework:– F’ = F(msy) * SSB(2012) / B(pa)
• MSY transition rule:– More gradual shift to F(msy)
• Zero catch• Roll-over landings• [Mixed-fisheries advice]
![Page 43: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/43.jpg)
North Sea cod – forecasts & advice (June 2012)
• Two versions of advice depending on intermediate year (2012) assumptions:– Table A: management plan followed in 2012,
giving 18% reduction in F.– Table B: recent trend in F continues, giving
12% reduction in F.
• ICES recommends Table B.
![Page 44: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/44.jpg)
North Sea cod – forecasts & advice (June 2012)
Rationale Basis Ftotal 2013
Landings 2013
Discards 2013
Unalloc 2013
SSB 2014
dSSB dTAC
Management plan
TAC cons.
0.26 25.4 6.5 8.6 107 +37%
-20%
Table A: (note 2012 TAC = 31.8)
![Page 45: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/45.jpg)
North Sea cod – forecasts & advice (June 2012)
Rationale Basis Ftotal 2013
Landings 2013
Discards 2013
Unalloc 2013
SSB 2014
dSSB dTAC
Management plan
TAC cons.
0.27 25.4 6.6 8.6 103 +36%
-20%
MSY F msy
0.19 19 4.9 6.4 112 +47%
-41%
MSY framework
F’ 0.10 10 2.5 3.4 123 +63%
-69%
MSY transition
Rule 0.29 28 7.2 9.4 101 +33%
-13%
Zero catch F = 0 0.00 0 0.0 0.0 136 +80%
-100%
Rollover landings
Landings 2012
0.49 43 11.5 14.6 82 +8% +34%
Table B: (note 2012 TAC = 31.8)
![Page 46: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/46.jpg)
West of Scotland cod
• See next file…
![Page 47: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/47.jpg)
North Sea cod – TR1 value maps
![Page 48: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/48.jpg)
North Sea cod – TR1 value maps
![Page 49: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/49.jpg)
North Sea cod – TR1 value maps
![Page 50: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/50.jpg)
North Sea cod – TR1 value maps
![Page 51: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/51.jpg)
North Sea cod – TR2 value maps
![Page 52: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/52.jpg)
North Sea cod – TR2 value maps
![Page 53: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/53.jpg)
North Sea cod – TR2 value maps
![Page 54: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/54.jpg)
North Sea cod – TR2 value maps
![Page 55: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/55.jpg)
Future developments – CCTV estimates of discard rates
• Work progressing on discard-rate estimation
• Potentially a very important data source• Several current limitations:
– Resources (equipment and staff)– Methodology– Quality of data
![Page 56: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/56.jpg)
Future developments – CCTV estimates of discard rates
![Page 57: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/57.jpg)
Future developments – CCTV estimates of discard rates
• Work progressing on discard-rate estimation
• Potentially a very important data source• Several current limitations:
– Resources (equipment and staff)– Methodology– Quality of data
• Hope to maintain cameras at least for scientific observation
![Page 58: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/58.jpg)
Future developments – draft management area proposals
North Sea, Skaggerak,Eastern ChannelRockall
IrishSea
Baltic
West ofScotland
North Sea, Skaggerak,Eastern ChannelRockall
IrishSea
Baltic
West ofScotland
![Page 59: The Cod Day Marine Laboratory, Aberdeen, 2 October 2012 The Cod Day - Science Coby Needle, Nick Bailey, Rui Catarino, Steven Holmes Marine Laboratory Aberdeen](https://reader030.vdocument.in/reader030/viewer/2022032722/56649ceb5503460f949b61ee/html5/thumbnails/59.jpg)
Future developments – draft management area proposals
Northern NS and Shelf
Southern NS
Rockall
Wider Celtic Seas
IrishSea
Baltic