Open Access
Table 1
Prevalence of metazoan parasites (live and shell-trapped) in three helicid species: Cornu aspersum, Cepaea nemoralis and Cepaea hortensis. Estimates are based on pooling all sites together.
| Cornu aspersum | Cepaea nemoralis | Cepaea hortensis | |
|---|---|---|---|
| Number of snails sampled across all 20 sites | 303 | 74 | 15 |
| Number of sites with snail species present | 17 | 4 | 1 |
| − in which shell-trapped trematode cercariae were found | 7 | 1 | 0 |
| Prevalence, all sites pooled, of shell-trapped parasites: | |||
| − all metazoan parasites (trematodes and nematodes) | 59.4% | 83.8% | 93.3% |
| − trematode cercariae | 6.9% | 1.4% | 0.0% |
| − nematodes | 56.4% | 83.8% | 93.3% |
| Prevalence, all sites pooled, of live parasites: | |||
| − all metazoan parasites | 43.2% | 44.6% | 6.7% |
| − trematode sporocysts/cercariae (in digestive gland) | 6.6% | 1.4% | 0.0% |
| − trematode metacercariae (in kidney) | 31.7% | 33.8% | 6.7% |
| − nematodes (in genitalia, lung, space or body-shell space) | 13.9% | 0.0% | 0.0% |
| − mites (in lung) | 0.0% | 10.8% | 0.0% |
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