PATHOGENECITY OF THREE SPECIES OF ASPERGILLUS (A.FUMIGATUS , A.NIGER & A.SYDOWII) ON SOME FRESH WATER FISHES

  • R. CHAUHAN, S. A. LONE AND A. H. BEIGH DEPARTMENT OF ZOOLOGY AND APPLIED AQUACULTURE, BARKATULLAH UNIVERSITY, BHOPAL

Abstract

Role of Aspergillus in causing fish mycoses is of outmost importance because in recent years Aspergillus infections have increased in fresh water fishes. The study was carried out on randomly collected 102 infected fresh water fishes from different water bodies. Three different species of Aspergillus  viz. A.fumigatus, A.niger, A.sydowii have been isolated from 9  different species of fishes viz. Channa striatus, Cirrhinus mrigala, Clarias batrachus, Labeo rohita, Macrognathus aculeatus, Mystus seenghala Puntius sarana, Puntius ticto and Trichogaster fasciatus. Total 38 isolates were recorded from infected fishes. Maximum isolates were of A.fumigatus (71%) followed by A. niger(18%) and minimum of A.sydowii(11%). Among the fishes, the maximum infected specimens were of M.seenghala and P.sarana. Organ wise, most infected area was caudal region (53%) and least was gills (8%). On   Corn Meal Agar (CMA) fastest growth was observed in A.fumigatus (47mm) within 10 days duration. Pathogenecity tests showed all the isolated species of Aspergillus were pathogenic to fishes causing infection and mortality of most of the fishes.

Section
RESEARCH PAPER