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    METASYSTOX INDUCED MOLECULAR IMMUNOLOGICAL MODULATIONS IN THE SOUTH-INDIAN EDIBLE FISH, CHANNASTRIATA
    (Department of Biotechnology, PSG College of Technology, Coimbatore Tamil Nadu, India, 2004-02-15) G, Sasikala; G M, Natarajan; N, Parthi; P, Esther Joice; S, Jacintha; G, Tamilselvi
    The body cells of fish are endowed with various molecular defense mechanisms. Shortterm (15 days) and long -term (30 days) exposure of Sublethal concentration (1.7mg/l) of organophosphorous pesticide, metasystox triggered many defense reactions in the South Indian edible fish, Channastriata. The lysozyme activity, plasma immunoglobulin profile, splenic antibody secreting cells and lymphocytes increased significantly (P<0.05). Though the phagocytic activity increased, the number of yeast cells phagocytized decreased in the pesticide-exposed fishes. The respiratory burst activity and migration of kidney granulocytes showed irregular oscillations. RBC, Hb and Ht increased at all times. An initial rise in the blood glucose and lactate fell abruptly at long term exposure. Sodium and Potassium balance was suppressed. It is therefore abundantly clear that the pesticide stress induces several adaptive immunological modulation in Channastriata.
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    ENVIRONMENT INDUCED CHANGES IN THE BIMODAL GAS EXCHANGE AND HAEMATOLOGY OF FACULTATIVE AIR-BREATHING FISH, MYSTUSPUNCTATUS
    (Department of Biotechnology, PSG College of Technology, Coimbatore Tamil Nadu, India, 2004-02-15) Devika R; Natarajan G M; Parthi N; Esther Joice P; Jacintha S; Parimala K; Sasikala G
    Many facultative air-breathing fishes augment their supply by utilizing a modified swim - bladder to breathe air. However, there is no direct evidence for the involvement of air bladder in the respiratory functions of any Indian air-breathing fish. Therefore, the present investigation was undertaken to study the environment-induced changes in the bimodal gas exchange and blood characteristics of Mystuspunctatus. Fish is a facultative air-breather. The air bladder extracts 27% of Оxygenfrom air under bimodal conditions. One-hour air exposure increased the air bladder Оxygenconsumption to 39%. 96 h starvation increased the gill respiration (70.5%) 35°C exposure increased the airbladder uptake to 34.18%. 96 h hypoxic exposure increased the gill respiration to 70.19%. Except blood glucose, RBC, Hb, Ht, О capacity, MCV, MCHC and MCH are more in male fishes than the females. One hr air- exposure decreased the, RBC, Hb, Ht, Оxygen capacity and blood glucose. Air exposure stress increased the MCV, MCHC and MCH. Present study demonstrates that environmental stress has pronounced effect on the bimodal exchange and hematology of Mystuspunctatus.