Cyathocephalus truncatus (Pallas, 1781) Brown

Cyathocephalus truncatus View in CoL

The mean and median intensity of infection with C. truncatus was low in 2011, with a prevalence varying from 23.5 % in age-class 3–4 to a maximum of 58.3 % in age-class 11–15 winters ( Table 3 View Table 3 ). There was a significant linear relationship between age-classes and the relative density of C. truncatus (linear regression, age: R 2 =0.69, df=6, F=11.15, p<0.05), and correspondingly between length-classes and relative density (linear regression; R 2 =0.71, df=5, F=9.65, p<0.05) ( Figure 4 View Figure 4 ). The positive relationship between relative volume of G. lacustris in stomach contents of brown trout age-classes 3 to ≥9 winters and the relative density of C. truncatus was also significant (linear regression; R 2 =0.82, df=6, F=23.26, p<0.01) ( Figure 5 View Figure 5 ).