Pasternak A F, Huntingford F A, Crompton D W
Division of Environmental and Evolutionary Biology, University of Glasgow, Scotland, UK.
Parasitology. 1995 May;110 ( Pt 4):395-9. doi: 10.1017/s0031182000064738.
In a population of copepods (Cyclops strenuus abyssorum), with a naturally high prevalence of infection with procercoids of Diphyllobothrium spp., no difference in body size was found between infected and uninfected hosts. However, a significant reduction in the reproductive capacity of infected females was observed, 87% of uninfected females having developed eggs in their gonads and sacs compared with 21% of infected females. The feeding rate of infected copepods was relatively high soon after infection occurred, but gradually decreased to less than half that of uninfected animals. Respiration rate was also lower in infected copepods. Infected copepods showed reduced motility and impaired escape responses, which is likely to make them more susceptible to predation.
在一群桡足类动物（深渊独眼水蚤）中，阔节裂头绦虫属原尾蚴的自然感染率很高，未发现受感染和未受感染的宿主在体型上存在差异。然而，观察到受感染雌体的繁殖能力显著下降，87%未受感染的雌体性腺和卵囊中已发育出卵，而受感染雌体的这一比例为21%。感染发生后不久，受感染桡足类动物的摄食率相对较高，但逐渐降至未受感染动物的一半以下。受感染桡足类动物的呼吸率也较低。受感染的桡足类动物活动能力降低，逃避反应受损，这可能使它们更容易被捕食。
