Embed Size (px)
Citation preview
EU Craft Project: Cod Light TechEU Craft Project: Cod Light TechLight Scanning ResultsLight Scanning Results
Collafirth and Vidlin SitesCollafirth and Vidlin Sites12-9-0612-9-06
Scanning Provided by IoA, University of StirlingScanning Provided by IoA, University of Stirling
Ambient Light Daytime Scan (W m-2)Daytime ambient intensity changes with depth
Depth (m)
-2 0 2 4 6 8 10 12 14 16
Inte
nsi
ty (
Wat
ts m
-2)
0.1
1
10
100
CCL Horizontal Intensity Scan (W m-2)
NOTE: scan performed on clean CCL unit.
NOTE: Comparisons are made with Metal Halide lights from data for other sites.
CCL Performance: Site comparisons
Site DescriptionsCollafirth20 x 100w CCL
1.5m under surface, 0.5m between units~15m deep 30m diam circles
Conical net~60,000 0.9kg cod/cage
Vidlin6 x 400w Metal Halide
Four @ 4m Two @ 8m depth
~15m deep 30m diam circles
Cut-down Volume net
~10,000 2.5kg cod/cage
Position of Light measurements
• Measurements at 2m intervals along each transect line (broken line)
• Transect lines denote direction of scans for interpretation from figures
• Depth readings taken at 1m intervals from surface to cage floor
• All results watts/m2
5m
5m
Effect of Bio-fouling?
NOTE: Before making intensity comparison between sites, CCL units had between 5-7weeks bio-fouling accumulation, undoubtedly will have had significant
effects on profiles obtained for working cages.
Vidlin 6x400W MHSURFACE
0.004
0.004
0.004
0.004
0.004
0.0040.004
0.002
0.002
0.002
0.002
0.002
0.0020.002
0.002
0.002
0.002
0.004
0.004
0.004
0.004
0.0040.004
0.006
0.006
0.006
0.006
0.012
0.0100.0100.0080.008
0.0060.006
0.0060.006
0.002
0.002
0.004
0.004
0.004
0.004
0.0040.004
0.004
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
Collafirth 20 x 100W CCLSURFACE
0.0350.0300.025
0.0200.020 0.0150.0150.0100.010
0.005
0.005
0.005
0.0350.0300.025
0.0200.020 0.0150.0150.0100.010
0.005
0.005
0.005
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
Surface
Note: red line denotes approximate cage circumference for the given depth
Note: average intensity and variation at each depth given in bold type below
0.0021 ± 0.0080 W/m2 0.0043 ± 0.0021 W/m2
Vidlin 6x400W MH1m
0.003
0.003
0.003
0.002
0.002
0.002
0.002
0.002
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.0010.001
0.001
0.001
0.001
0.003
0.003
0.004
0.004
0.004
0.004
0.0020.002
0.003
0.003
0.003
0.002
0.0060.006
0.005
0.005
0.005
0.007
0.0020.002
0.003
0.002
0.002
0.003
0.004
0.002
0.002
0.003
0.002
0.002
0.002
0.003
0.003
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
1m DepthCollafirth 20 x 100W CCL
1m
0.001
0.001
0.001
0.001
0.001
0.002
0.003
0.0100.0090.0080.0070.0060.0050.004
0.0040.003
0.002
0.002
0.001
0.001
0.001
0.001
0.001
0.002
0.003
0.0100.0090.0080.0070.0060.0050.004
0.0040.003
0.002
0.002
0.001
0.001
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
Note: red line denotes approximate cage circumference for the given depth
0.0018 ± 0.0025 W/m2 0.0033 ± 0.0012 W/m2
Vidlin 6x400W MH2m
0.002
0.002
0.002
0.0020.002
0.001
0.001 0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.0030.003
0.003
0.003
0.003
0.0030.003
0.004
0.0040.004
0.0020.002
0.0020.002
0.002
0.0020.002
0.0020.002
0.0020.002
0.002
0.0020.003
0.003
0.002
0.002
0.003
0.003
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
2m DepthCollafirth 20 x 100W CCL
2m
0.002
0.002
0.0020.002
0.002
0.002
0.001 0.001
0.001
0.001
0.001
0.0010.001
0.001
0.0070.0070.0060.006
0.005
0.005
0.0050.004
0.0040.004
0.0040.003
0.003
0.003
0.0030.003
0.003
0.0120.0110.010
0.0090.0090.0080.008
0.002
0.002
0.0020.002
0.003
0.0030.003
0.002
0.0040.0040.002
0.004
0.002
0.003
0.0070.007 0.0060.006
0.005
0.005
0.005
0.0120.0110.010
0.0090.009 0.0080.008
0.001
0.001
0.001
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
Note: red line denotes approximate cage circumference for the given depth
0.0033 ± 0.0036 W/m2 0.0029 ± 0.0008 W/m2
Vidlin 6x400W MH3m
0.002 0.002
0.002
0.002
0.0020.002
0.002
0.002
0.002
0.004
0.004
0.0160.0140.012
0.0100.0100.0080.008
0.006
0.006
0.006
0.004
0.004
0.006
0.004
0.004
0.004
0.004
0.0160.0140.012
0.0100.010 0.0080.008
0.006
0.006
0.006
0.004
0.0040.006
0.004
0.004
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
3m DepthCollafirth 20 x 100W CCL
3m
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.0070.0050.005
0.0030.003
0.005
0.0050.005
0.003 0.003
0.0030.003
0.003
0.0030.003
0.003
0.009 0.0070.007
0.007
0.005
0.005
0.005
0.005
0.003
0.0070.0050.005
0.001
0.003
0.003
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
Note: red line denotes approximate cage circumference for the given depth
0.0037 ± 0.0026 W/m2 0.0048 ± 0.0039 W/m2
Vidlin 6x400W MH4m
0.02 0.02
0.02
0.02
0.010.01
0.01
0.01
0.010.01
0.01
0.01
0.01
0.04
0.03
0.030.03
0.03
0.020.02
0.02
0.050.050.050.04
0.040.04
0.03 0.03
0.03
0.03
0.030.05
0.040.04
0.01
0.010.01
0.01
0.02
0.03
0.02
0.04
0.02
0.02
0.04
0.02
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
4m DepthCollafirth 20 x 100W CCL
4m
0.001 0.001
0.001
0.001
0.0010.001
0.001
0.001
0.001
0.0190.0160.0130.0100.007
0.004 0.004
0.004
0.0100.007
0.007
0.007
0.004
0.0040.004
0.0070.004
0.004
0.004
0.0070.0070.010
0.007
0.004
0.0190.0160.013
0.0100.0100.007
0.007
0.010
0.007
0.004
0.004
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
Note: red line denotes approximate cage circumference for the given depth
0.0063 ± 0.0059 W/m2 0.0260 ± 0.0177 W/m2
Vidlin 6x400W MH5m
0.05
0.050.05
0.03 0.03
0.030.03
0.01
0.01
0.01
0.01
0.01
0.010.01
0.01
0.01
0.01
0.05
0.05
0.05
0.05
0.030.03
0.030.03
0.03 0.07
0.070.07
0.07
0.07
0.07
0.190.170.150.13
0.110.110.090.09
0.11 0.090.09
0.05
0.07
0.03
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
5m DepthCollafirth 20 x 100W CCL
5m
0.004
0.002 0.002
0.002
0.002
0.0100.008
0.006
0.006
0.006
0.006
0.006
0.006
0.004
0.004
0.002
0.002
0.002
0.004
0.0080.008
0.004
0.004
0.004
0.004
0.0060.0060.006
0.0120.010
0.0080.008
0.008
0.004
0.0100.002
0.0020.004
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
Note: red line denotes approximate cage circumference for the given depth
0.0058 ± 0.0038 W/m2 0.0589 ± 0.0469 W/m2
Vidlin 6x400W MH6m
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.030.03
0.03
0.070.07
0.05
0.05
0.05
0.09
0.030.03
0.030.03
0.050.05
0.03
0.03
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
6m DepthCollafirth 20 x 100W CCL
6m
0.0030.002
0.002
0.001 0.001
0.001
0.001
0.0010.001
0.001
0.001
0.003
0.003
0.0030.003
0.002
0.0020.002
0.002
0.003
0.004
0.002
0.0100.0090.0080.007
0.0060.006 0.0050.0050.004
0.004
0.004
0.002
0.003
0.003
0.0040.003
0.0030.002
0.002
0.002
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
Note: red line denotes approximate cage circumference for the given depth
0.0032 ± 0.0021 W/m2 0.0390 ± 0.0242 W/m2
Vidlin 6x400W MH7m
0.01
0.01
0.01
0.01
0.010.01
0.01
0.01
0.03
0.03
0.03
0.030.03
0.05
0.130.11
0.090.090.070.07
0.05
0.05
0.05
0.03
0.03
0.05
0.03
0.03
0.05
0.03
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
7m DepthCollafirth 20 x 100W CCL
7m
0.0010
0.0015
0.0015
0.00150.0015
0.0010
0.00100.0010
0.0010
0.0020
0.0025
0.0025
0.00250.0020
0.0020
0.00300.0030
0.0035
0.0015
0.00150.0020
0.0010
0.0010
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
Note: red line denotes approximate cage circumference for the given depth
0.0017 ± 0.0009 W/m2 0.0397 ± 0.0358 W/m2
Vidlin 6x400W MH8m
0.03
0.030.03
0.03
0.01
0.01
0.010.01
0.01
0.01
0.05
0.05
0.05
0.150.13
0.110.110.090.09
0.070.070.17
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
8m DepthCollafirth 20 x 100W CCL
8m
0.001
0.001
0.001
0.001
0.001
0.0010.002
0.002
0.002
0.002
0.005
0.0040.0040.0030.003
0.0010.002
0.001
0.001
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
Note: red line denotes approximate cage circumference for the given depth
0.0018 ± 0.0014 W/m2 0.0663 ± 0.0651 W/m2
Vidlin 6x400W MH9m
0.025
0.0250.025
0.0250.015
0.0150.015
0.015
0.005
0.005
0.0050.005
0.005
0.005
0.0350.0350.0650.055
0.0450.045
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
9m DepthCollafirth 20 x 100W CCL
9m
0.0005
0.0005
0.0005
0.0005
0.0005
0.0005
0.0015
0.0015
0.0015
0.0035
0.00250.0025
0.0005
0.0005
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
Note: red line denotes approximate cage circumference for the given depth
0.0011 ± 0.0011 W/m2 0.0362 ± 0.0257 W/m2
Vidlin 6x400W MH10m
0.005
0.0050.005
0.005
0.0250.015
0.015
0.015
0.035
0.0250.025
0.025
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
10m DepthCollafirth 20 x 100W CCL
10m
0.0010
0.0010
0.0010
0.0010
0.00250.0020
0.00150.0015
0.0010
X Dist (m)
0 5 10 15 20 25 30
Y D
ist (
m)
0
5
10
15
20
25
30
Note: red line denotes approximate cage circumference for the given depth
0.0010 ± 0.0009 W/m2 0.0284 ± 0.0123 W/m2
