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| Article Name : | | | BEHAVIOURAL AND HISTOLOGICAL CHANGES INDUCED BY CADMIUM CHLORIDE ON ALIMENTARY TRACT OF FRESHWATER FISH, TILAPIA MOSSAMBICA (PETERS) | | Author Name : | | | Meenakshi Sundaresan | | Publisher : | | | Ashok Yakkaldevi | | Article Series No. : | | | ROR-709 | | Article : | |  | Author Profile | | Abstract : | | | The present work deals with Cadmium induced behavioral and histological changes in the alimentary tract of Tilapia mossambica (Peters). The fish were exposed to sub lethal concentration of 8 ppm Cadmium chloride for 6 and 22 days. Sections of buccal epithelium, stomach, intestine and rectum of control and treated fish were stained with H/E and Giemsa and studied for histological purposes. Treatment induced changes observed include overall thinning of the wall of alimentary canal leading to loss of tubular nature, separation of the mucosa layer from the underlying tissue, desquamatisation of the epithelial lining and the isolation of epithelial cells etc. Occurrence of cytoplasmic vacuoles and tearing of the epithelial layer is quite frequent. Loss of villar tips in the intestine and increase in the number of lymph glands in the rectum are the other noticeable changes. Occurrence and the extent of such changes are proportional to the dosages of treatment and also to the period of exposure. | | Keywords : | | - histological changes
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