Table 7 Estimates of sea louse prevalence and intensity on wild chum and pink in 2008 (N = 30,240) and 2009 (N = 26,371) for fish sampled under ‘non-lethal’ and ‘lethal’ sampling protocols respectively in sub-zone 3.3.
Non-lethal | 2008 | 2009 | |||||
|---|---|---|---|---|---|---|---|
Apr | May | June | Apr | May | June | July | |
All fish | 5669 | 9451 | 7997 | 3174 | 9929 | 5495 | 528 |
Not infested | 5216 | 8160 | 5978 | 3049 | 8160 | 4489 | 396 |
Infested | 453 | 1291 | 2019 | 125 | 1769 | 1006 | 132 |
All lice | 504 | 1738 | 3114 | 128 | 2322 | 1386 | 187 |
Prevalence | 8.0% | 13.7% | 25.2% | 3.9% | 17.8% | 18.3% | 25.0% |
Intensity | 1.11 | 1.35 | 1.54 | 1.02 | 1.31 | 1.38 | 1.42 |
Lethal | |||||||
All fish | 1432 | 3348 | 2343 | 1092 | 2988 | 2904 | 261 |
Not infested | 1374 | 3138 | 2025 | 1070 | 2776 | 2486 | 206 |
Infested | 58 | 210 | 318 | 22 | 212 | 418 | 55 |
All lice | 70 | 302 | 494 | 26 | 251 | 776 | 104 |
Prevalence | 4.1% | 6.3% | 13.6% | 2.0% | 7.1% | 14.4% | 21.1% |
Intensity | 1.21 | 1.44 | 1.55 | 1.18 | 1.18 | 1.86 | 1.89 |
Compare Lethal / Non-lethal | |||||||
Prevalence | 51% | 46% | 54% | 51% | 40% | 79% | 84% |
Intensity | 109% | 107% | 101% | 116% | 90% | 135% | 133% |
