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M icrocystis aeruginosa ( K ütz) incorporated diets increase immunity and survival of I ndian major carp L abeo rohita ( H am.) against A eromonas hydrophila infection
Author(s) -
Das Basanta Kumar,
Pradhan Jyotirmayee,
Sahu Swagatika,
Marhual Nilima Priyadarshini,
Mishra Bibudhendra Kumar,
Eknath Ambekar E
Publication year - 2013
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2012.03098.x
Subject(s) - labeo , aeromonas hydrophila , biology , lysozyme , microcystis aeruginosa , globulin , microbiology and biotechnology , carp , albumin , immunity , zoology , immune system , immunology , bacteria , fish <actinopterygii> , cyanobacteria , fishery , endocrinology , biochemistry , genetics
The aim of this study was to evaluate dietary dosages of M icrocystis on the immune response and disease resistance against infections due to the opportunistic pathogen A eromonas hydrophila in L abeo rohita fingerlings. L abeo rohita fingerlings were fed diet containing 0 ( C ontrol), 0.5, 1.0 and 5 g M icrocystis powder kg −1 dry diet for 90 days. Three replicate groups of fish averaging 20 ± 2 g were fed for 3 months daily. At 30 days interval, samples were assayed for different biochemical [serum total protein, albumin, globulin, albumin:globulin (A:G) ratio] and immunological (superoxide anion production, lysozyme and serum bactericidal activity) parameters. The results demonstrate that fish fed M icrocystis showed increased levels of lysozyme, serum bactericidal activity, serum protein and albumin ( P ≤ 0.05) as compared with the control group. After 90 days, fish were challenged with A . hydrophila and mortality (%) was recorded up to day 10 postchallenge. The group fed 1.0 g M icrocystis kg −1 dry diet showed the highest percentage survival (72%). These results indicate that M icrocystis aeruginosa stimulates the immunity and makes L . rohita more resistant to infection by A . hydrophila when fed in dried form in feed.