Crepidostomum spp

Crepidostomum spp

C. metoecus was recorded in all examined trout and had a high mean and median intensity compared to C. farionis , which also had a much lower prevalence in all age-classes ( Table 3 View Table 3 ). The positive relationships between age-classes/length-classes, respectively, and relative density of Crepidostomum spp. were both significant (linear regression, age: R 2 =0.88, df=6, F=37.21, p<0.01; length: R 2 =0.66, df=5, F=7.83, p<0.05) ( Figure 6 View Figure 6 ). There was no significant relationship between the relative volume of G. lacustris in stomach contents and relative density of C. metoecus in the age-classes 3–≥9 winters (R 2 =0.34, df=6, F=2.62, p>0.05). Neither was there a significant relationship between relative volume percent of G. lacustris + mayflies in stomach contents (both expected intermediate hosts) and relative density of Crepidostomum spp. in age-class 3–≥9 winters (R 2 =0.54, df=6, F=6.02, p>0.05).