CRD 02-02

Table 5a. 1999 Discard estimation procedure for Gulf of Maine cod based on 1999 VTR records.
D/K Ratio
Month of the Year
1
2
3
4
5
6
7
8
9
10
11
12
Total
Trawls 0.164 0.149 0.149 0.176 0.785 8.403 5.706 0.820 1.153 1.227 2.548 2.157
Gillnets
0.428
0.006 0.041 0.019 1.135 10.731 13.596 3.718 4.393 6.027 7.216 3.136
Other
0.114
0.052 0.318 0.011 0.042 3.651 4.837 0.014 0.016 0.028 0.208 0.208
Total
Landings
1
2 3 4 5 6 7 8 9 10 11 12 Total
Trawls
141.6
68.1 112.5 112.5 185.4 44.9 20.5 22.2 21.1 18.9 30.3 57.8 835.8
Gillnets
81.1
36.2 30.3 111.4 109.8 29.2 38.9 36.2 38.9 31.4 24.3 38.4 606.1
Other
38.9
17.3 30.3 26.5 23.2 2.7 3.8 4.9 9.2 9.2 11.4 16.8 194.1
Total
261.7
121.6 173.0 250.3 318.4 76.8 63.3 63.3 69.2 59.5 66.0 113.0 1636.0
Disc
1
2 3 4 5 6 7 8 9 10 11 12 Total
Trawls
23.2
10.2 16.8 19.8 145.5 377.1 117.2 18.2 24.3 23.2 77.1 124.8 977.4
Gillnets
34.7
0.2 1.3 2.1 124.6 313.3 529.2 134.7 171.0 189.0 175.6 120.4 1795.9
Other
4.5
0.9 9.6 0.3 1.0 9.9 18.3 0.1 0.1 0.1 0.3 3.5 48.6
Total
62.4
11.3 27.7 22.1 271.0 700.2 664.8 152.9 195.4 212.3 253.0 248.6 2821.9
Catch
1
2 3 4 5 6 7 8 9 10 11 12 Total
Trawls
164.9
78.3 129.3 132.2 330.9 421.9 137.8 40.3 45.4 42.1 107.4 182.6 1813.2
Gillnets
115.8
36.4 31.5 113.4 234.3 342.5 568.2 170.9 209.9 220.3 199.9 158.8 2402.0
Other
43.4
18.2 39.9 26.8 24.2 12.6 22.1 4.9 9.3 9.3 11.7 20.3 242.7
Total
324.1
132.9 200.7 272.5 589.5 777.0 728.0 216.2 264.6 271.8 319.0 361.6 4457.9

Table 5b. Discard estimation procedure for Gulf of Maine cod based on 2000 VTR records.
D/K Ratio
Month of the Year
1
2
3
4
5
6
7
8
9
10
11
12
Total
Trawls 1.223 0.506 0.555 0.193 0.389 0.346 0.581 0.285 0.414 0.476 0.426 0.345
Gillnets 0.816 0.258 0.282 0.447 0.287 0.876 1.039 0.567 1.764 0.674 1.127 0.694
Other
0.242
0.056 0.041 0.183 0.164 0.017 0.233 0.556 0.554 0.200 0.088 0.117
Total
Landings
1
2 3 4 5 6 7 8 9 10 11 12 Total
Trawls 170.6 92.1 90.2 58.4 398.1 215.9 133.6 77.6 57.0 68.7 170.1 340.2 1872.5
Gillnets 58.9 25.7 69.6 55.6 169.6 357.5 253.7 192.5 108.9 116.4 115.0 121.5 1644.9
Other
30.4
15.9 20.1 8.9 30.8 22.0 7.9 4.2 14.0 9.8 4.2 44.4 212.6
Total
259.8
133.6 179.9 122.9 598.6 595.3 395.3 274.3 179.9 194.9 289.3 506.1 3730.0
Disc
1
2 3 4 5 6 7 8 9 10 11 12 Total
Trawls 208.6 46.5 50.1 11.3 155.0 74.6 77.6 22.1 23.6 32.7 72.4 117.4 891.8
Gillnets 48.0 6.6 19.6 24.9 48.8 313.2 263.7 109.1 192.1 78.4 129.5 84.3 1318.2
Other
 7.4 0.9 0.8 1.6 5.1 0.4 1.8 2.3 7.8 2.0 0.4 5.2 35.6
Total
 264.0 54.1 70.5 37.8 208.8 388.2 343.1 133.5 223.4 113.1 202.3 206.8 2245.6
Catch
1
2 3 4 5 6 7 8 9 10 11 12 Total
Trawls 379.2 138.6 140.3 69.7 553.1 290.5 211.2 99.7 80.6 101.4 242.5 457.6 2764.3
Gillnets 106.9 32.3 89.3 80.5 218.4 670.6 517.4 301.7 301.0 194.8 244.5 205.8 2963.1
Other
37.7
16.8 20.9 10.5 35.9 22.3 9.8 6.5 21.8 11.8 4.6 49.6 248.2
Total
523.9
187.7 250.4 160.7 807.4 983.5 738.4 407.9 403.3 308.0 491.6 712.9 5975.6

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