Histological effects of prolonged sublethal hypoxia on channel catfish Ictalurus punctatus (Rafinesque) |
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| Authors: | A L SCOTT W A ROGERS |
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| Institution: | Department of Fisheries and Allied Aquacultures, Agriculture Experiment Station, Auburn University, Alabama, U.S.A. |
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| Abstract: | Abstract. A vacuum degassing apparatus was used to subject channel catfish Ictalurus punctatus (Rafinesque) to sublethal hypoxia for 24, 48 or 72 h. Spleen, liver, gills, anterior kidney and posterior kidney from the catfish exhibited histopathological changes that included necrosis, hyperaemia, oedema, haemorrhage, hyperplasia and hypertrophy. Of the organs examined, gills were most affected by the hypoxic conditions. After 5 days of reacclimatization to normoxic conditions, channel catfish continued to exhibit histopathological effects of prolonged hypoxia. |
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