Skip to main content

Advertisement

Table 2 Prevalence of the larval trematodes (% infected snails in the pooled samples) in the two hosts studied in the four Ruhr reservoirs and significance of differences (p) for between-reservoir comparisons (contrasts in overall prevalence and the prevalence of the dominant species).

From: Larval trematode communities in Radix auricularia and Lymnaea stagnalis in a reservoir system of the Ruhr River

   Radix auricularia Lymnaea stagnalis
Trematode species Final hosts Baldeneysee Hengsteysee Harkortsee Kemnader See p Baldeneysee Hengsteysee Harkortsee Kemnader See p
Diplostomum spathaceum* GUL 0.59 5.64 (1) - 4.55 0.027 - - - - -
Trichobilharzia franki* ANA 0.59 8.72 (2) - - 0.0001 - - - - -
Paryphostomum radiatum* COR 3.55 (1) 4.10 (1) - - ns - - - - -
Echinoparyphium recurvatum* ANA 11.24 (3) 4.10 (1) - - 0.007 1.48 - - - -
Opisthioglyphe ranae* AM 1.18 (1) - - 2.27 ns - - - 6.25 -
Plagiorchis elegans VAR - 0.51 4.55 - - 0.74 - - - -
Australapatemon burti ANA - 1.03 - - - - - - - -
Echinostoma sp. ANA 0.59 1.54 - - - - - - - -
Hypoderaeum conoideum ANA - 1.03 - - - - - - - -
Isthmiophora melis MAM - 1.03 - - - - - - - -
Notocotylus attenuatus ANA 0.59 0.51 - - - - - - - -
Tylodelphys clavata GRE - 1.03 - - - - - - - -
Diplostomum pseudospathaceum* GUL - - - - - 3.70 9.10 17.39 (1) 12.50 0.036
Echinostoma revolutum ANA - - - - - 5.19 - 4.35 - -
Trichobilharzia szidati ANA - - - - - 2.96 - - - -
Overall prevalence (%)   18.3 28.2a 4.6 4.6b 0.0001 14.1 9.1 21.7 18.8 ns
No. of species in component communities (range)   1-4 1-7 1 - - 1-2 - 2 - -
No. of dominant species in component communities (range)   0-2 0-3 - - - - - 1 - -
  1. Dominant species are indicated by an asterisk and the number of communities where dominant given in parentheses following the overall prevalence. Abbreviations for the definitive host groups of trematodes: AM, amphibians; ANA, anatids; COR, cormorants; GRE, grebes; GUL, gulls; MAM, small mammals; VAR, various lariform and passeriform birds.
  2. atwo double infections; bone double infection.