Wpływ zarażenia larwami tasiemca Taenia taeniaeformis na parametry morfometryczne piżmakow [Ondatra zibethicus]

An investigation aimed to check the influence of Taenia taeniaeformis larvae on morphometrical parameters of muskrat (Ondatra zibethicus) was carried. A total of 30 animals were hunted down in upper Vistula river basin in south Poland, then measured, weighed and dissected. Statistical comparison were done using U Mann-Whitney test. T. taeniaeformis larvae – cysticercus fasciolaris was found in the liver of 24 muskrats (80%). Significant differences between infected and non infected animals are reported, as regards their body mass, total length, abdomen circumference (p<0.01) and also in body length (total minus tail length), head length, or chest and neck circumference (p<0.05). The effect of infection on both muskrat condition and the presence of adult cestodes in definitive hosts are discussed.