Influence of fish personality on infection rate is poorly studied. In the experiments on young-of-the-year Oncorhynchus mykiss and cercariae of the trematode Diplostomum pseudospathaceum, we tested the hypothesis that infection rate differs between more and less active ("bold" and "shy") fish. Will individual differences in infection persist upon re-infection? Fish serve as a second intermediate host for this trematode. Positive correlation was found between the results of consecutive infections. Accumulation of parasites with successive infections leads to an aggregated distribution of D. pseudospathaceum among the hosts, affecting individual fitness and polymorphism in fish populations. Persistent individual differences in parasite burden among fish and, as a result, vulnerability for predators confirms the role of parasites as an important factor of natural selection.

中文翻译：

---

人格影响鱼中寄生虫的风险。

鱼类个性对感染率的影响研究很少。在对年幼的气管双孢假单胞菌的Onmyhynchus mykiss和尾c的实验中，我们测试了这样的假说，即活跃程度（“大胆”和“害羞”）鱼的感染率不同。重新感染后个体感染差异是否会持续存在？鱼是该吸虫的第二中间宿主。在连续感染的结果之间发现正相关。带有连续感染的寄生虫的积累导致寄主中D. pseudospathaceum的聚集分布，影响了鱼类种群的个体适应性和多态性。鱼类中寄生虫负担的持久个体差异，因此，