Pathological assessment of farmed yellowtail tetra Astyanaxaltiparanae infest…

This study registers for the first time the copepod Acusicola sp. infesting the gills of farmed yellowtail tetraAstyanax altiparanae, as well as new information on gross pathology and gill alterations. Five specimens ofyellowtail tetra showing slow swimming, respiratory difficulty, scaleness and darkened skin were exam-ined. Fish were analysed in situ for ectoparasites diagnosis. Fragments of t…