Table 4
Number of Anisus spirorbis at the 30th day of experiment in pairs formed by A. spirorbis + Galba truncatula (40 + 40 snails, respectively, per life stage) and in controls (40 planorbids per life stage). The numbers noted for each pair of snails or each control group in the four experiments were reduced to an average with a standard deviation for a single experiment.
| Snail group | Number of Anisus spirorbis: mean value (SD) | ||
|---|---|---|---|
| Juveniles | Pre-adults | Adults | |
| Snail pairs with: | |||
| Juvenile lymnaeids | 32.0 (2.2) | 36.5 (0.5) | 39.2 (0.4) |
| Pre-adults | 17.5 (2.9) | 28.7 (2.8) | 38.5 (1.1) |
| Adults | 11.0 (2.5) | 20.3 (1.9) | 36.0 (1.5) |
| Controls | 37.5 (1.1) | 37.5 (1.1) | 38.2 (0.8) |
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