Abstract

The presente study report the first occurrence of T. elongatus in P. pardalis, a fish of the order Siluriformes. Were analyzed 44 individuals of P. pardalis caught in Lake Araca (Amazon state, Brazil). The mean fish standard length was 24.5cm ± 8.8 and the mean weight was 213.9g ± 102.6. The specimen found a postmetamorphic female, penetrated deep into the gill arch. Until the present moment there was the registration of T. elongatus only for fish of order Perciformes and Cichliformes, thus this is the first records for host of order Siluriformes. Keywords: Amazonian; Copepoda; fish; freshwater.

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