Abstract

MYCOTIC INFECTION IN SOME ECONOMICALLY IMPORTANT FRESHWATER FISHES

S. A. Mastan*, S. A. Begum, Md. Osman Ahmed and S. Shamshad

ABSTRACT

A total five species of fungi were isolated from diseased fishes collected from local water bodies and fish markets of Gudiwada and Kaikalur mandals of Krishna district, Andhra Pradesh. The isolated fungal pathogens were belongs two genera and five species and were identified as Saprolegnia parasitica, S.diclina, Achlya americana, A.flagellata and A.prolofera. They were isolated from eight species of fresh water fishes namely Labeo rohita,Catla catla,Channa striatus, C.punctatus, Clarias batrachus, Mystus cavasius, M.seenghala and Tilapia mossambica. S.parasitica was associated with six species of fishes while A. prolifera was associated two fish species only. The maximum percentage (7.9%) of infection was observed in Channa striatus and minimum (2.5%) was observed in Tilapia mossambica. The artificial infection trails indicates that Saprolegnia parasitica is found to be more virulent to the freshwater fishes.

Keywords: Mycotic infection, Fungi, Fishes.