Table 2 Relationship between snail densities and snail mortality rates and egg production
Snail density (snails/litre) | Mortality rate/week | Mean egg masses/snail/week | Mean eggs/egg mass | Mean eggs/snail/week | |
|---|---|---|---|---|---|
(95% CI) | (95% CI) | (95% CI) | (95% CI) | ||
B. stanleyi | 1 | 0.166 (0.131-0.200) | 0.538 (0.473-0.603) | 12.2 (11.7-12.8) | 6.81 (5.79-7.83) |
2 | 0.232 (0.189-0.276) | 0.404 (0.351-0.458) | 11.6 (10.9-12.4) | 4.90 (4.04-5.76) | |
4 | 0.351 (0.300-0.402) | 0.183 (0.140-0.227) | 9.5 (8.7-10.4) | 1.93 (1.39-2.46) | |
p < 0.0001 | p < 0.0001 | p < 0.0001 | p < 0.0001 | ||
B. sudanica | 1 | 0.332 (0.258-0.406) | 2.54 (2.29-2.79) | 17.5 (16.8-18.2) | 46.1 (40.5-51.7) |
2 | 0.28 (0.212-0.348) | 1.21 (0.97-1.45) | 14.4 (13.0-15.8) | 19.4 (15.1-23.6) | |
4 | 0.308 (0.245-0.371) | 0.71 (0.53-0.89) | 13.4 (11.8-14.9) | 11.4 (7.8-14.9) | |
p = 0.6 | p < 0.0001 | p < 0.0001 | p < 0.0001 |