Table 4.
Component communities in R. auricularia and L. stagnalis (reduced dataset) and within-reservoir variations in the levels of larval trematode infections (contrasts in overall prevalence and the prevalence of the dominant species).
| Snail species | Trematode species | Prevalence (%) | Significance of differences (p) | |||
|---|---|---|---|---|---|---|
| Baldeneysee | Site B1 | Site B3a§ | Site B3b§ | Site B6 | ||
| (n= 20) | (n = 76) | (n = 20) | (n = 22) | |||
| R. auricularia | Overall prevalence | 15.0 | 22.4 | 31.6 | 18.2 | ns |
| O. ranae | - | - | 10.5 | - | 0.018 | |
| D. spathaceum | - | - | 5.3 | - | ns | |
| E. recurvatum | - | 17.1 | 10.5 | 18.2 | ns | |
| P. radiatum | 15.0 | 2.6 | - | - | ns | |
| N. attenuatus | - | 1.3 | - | - | - | |
| Echinostoma sp. | - | 1.3 | - | - | - | |
| R. auricularia | Hengsteysee | Site He1 | Site He2 | Site He3 | Site He6a | |
| (n = 35) | (n = 30) | (n = 50) | (n = 51) | |||
| Overall prevalence | 2.9 | 76.7 | 44.0 | 2.0 | 0.0001 | |
| T. franki | - | 26.7 | 18.0 | - | 0.0001 | |
| E. recurvatum | - | 23.3 | - | 2.0 | 0.0001 | |
| D. spathaceum | - | 13.3 | 4.0 | - | 0.007 | |
| P. radiatum | - | - | 10.0 | - | 0.008 | |
| Echinostoma sp. | 2.9 | 3.3 | 2.0 | - | - | |
| P. elegans | - | 3.3 | - | - | - | |
| A. burti | - | 3.3 | - | - | - | |
| T. clavata | - | 6.7 | - | - | - | |
| H. conoideum | - | - | 4.0 | - | - | |
| N. attenuatus | - | - | 2.0 | - | - | |
| I. melis | - | - | 4.0 | - | - | |
| L. stagnalis | Baldeneysee | Site B1 | Site B3a | Site B4 | ||
| (n = 22) | (n = 51) | (n = 37) | ||||
| Overall prevalence | 4.5 | 13.7 | 8.1 | ns | ||
| D. pseudospathaceum | 4.5 | 5.9 | - | ns | ||
| E. revolutum | - | 7.8 | 5.4 | - | ||
| P. elegans | - | - | 2.7 | - | ||
§Same site sampled twice: on 26 September (a) and on 19 October (b).