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Bacteriological study of shrimp, Penaeus monodon Fabricius, hatcheries in India
Author(s) -
Otta,
Karunasagar,
Karunasagar
Publication year - 2001
Publication title -
journal of applied ichthyology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 62
eISSN - 1439-0426
pISSN - 0175-8659
DOI - 10.1046/j.1439-0426.2001.00249.x
Subject(s) - penaeus monodon , biology , shrimp , hatchery , veterinary medicine , cloxacillin , vibrio , fishery , aquaculture , shrimp farming , ampicillin , microbiology and biotechnology , antibiotics , bacteria , fish <actinopterygii> , medicine , genetics
Shrimp hatcheries often face problems of mortality caused by diseases. To understand the bacteriological status of shrimp, Penaeus monodon Fabricius, hatcheries in India, a study of hatchery water at different points was conducted in several hatcheries located along the east and west coast of India. The species composition of the bacterial flora was also determined. The total plate counts of raw sea water on tryptic soya agar ranged from 10 2 to 10 4 ml –1 , whereas it ranged from 10 4 to 10 6 ml –1 in larval tanks. In the larval tanks, the proportion of Vibrio species ranged from 50% to 73%, as compared to 31% in raw sea water. A mixed bacterial flora was observed in hatchery water; however, in the larval tanks, the flora in the larvae was predominantly made up of Vibrio species. A few of the tested Vibrio isolates were non‐virulent to shrimp larvae under experimental conditions. Over 90% of the strains were resistant to amoxycillin, ampicillin, cephalexin, cephazolin, cloxacillin and sulphafurazole. Most strains showed sensitivity to tetracycline, chloramphenicol, and quinolones such as norfloxacin and ciprofloxacin.