Table 1.
Summary of the number of replicates in each treatment, and the numbers of snails in used in each of the treatments A-D (that were all housed in water from Site 1)
| Treatment | No. of replicates | No. of B. pfeifferi Median (range) |
Location source of B. pfeifferi | No. of B. globosus Median (range) |
Location source of B. globosus |
|---|---|---|---|---|---|
| A | 6 | 20 (19–21) | Site 1 | 3 (2–3) | Site 1 |
| B | 6 | 20 (19–21) | Site 1 | 6 (3–6) | Site 1 |
| C | 6 | 10 (10–11) | Site 1 | 3 (3–3) | Site 2 |
| D | 6 | 10 (10–11) | Site 1 | 6 (5–6) | Site 2 |
| Ea | 6 | – | – | – | – |
| Fb | 2 | – | – | – | – |
aTreatment E was a negative control (using water from Site 1)
bTreatment F was a negative control (using tap water)
Notes: There is some slight variation in the numbers of snails in each replicate, as on inspection after the experiment some snails used were found to be empty shells containing only sediment, while some small snails had tucked into shells of larger snails