The present investigation was undertaken to investigate the acute toxicity of cadmium, a heavy metal widely detected in aquatic environment due natural effects and anthropogenic activities, freshwater teleost, Channa punctata (Bloch). experiments for bioassay were performed semi-static test condition according standard guidelines. behavioural changes fish observed all tested concentrations meta...

Gelatins from the skin of four different species of fresh water fish, namely pangas catfish (Pangasius pangasius), Asian redtail catfish (Hemibagrus nemurus), striped snakehead (Channa Striata), and Nile tilapia (Oreochromis niloticus) have been successfully extracted by citric acid. The gelatin from pangas catfish was found to possessed the highest rheology properties compared to the others. I...

The aim of this study was to examine the histological changes in the liver of fish Channa punctatus (Bloch) for a short term (8day) and long term (30 days) exposure in response to the Phenolic Industrial effluents of Bhilai Steel plant. Fishes were exposed in different concentration (low .01%, .015%, .02, .025%) and ( high concentration 10%, 20%, 30%) of Phenolic effluent. Tissu sections of the...

Adult Channa punctatus murrels of both sexes (60-80 g) were collected locally from Ramgarh Lake during the second week of every month (10 individuals of each sex/month) throughout the year. Blood samples were collected and analyzed for serum calcium and phosphate levels by the methods of Trinder (1960) and Fiske and Subbarow (1925), respectively. Gonads were fixed to judge the state of maturati...

The present investigation was undertaken to assess the effects of sublethal concentrations of zinc (0.1 and 0.2 mgl(-1)) on the nutritional value of fish Channa punctatus after exposure for 135 days. The parameters studied were, levels of total proteins, glycogen, total lipids, cholesterol and vitamins (A and D) in the muscle. Total proteins, glycogen, total lipids and vitamin D show highly sig...

In oviparous organisms, yolk accumulation in the oocytes is critical and indispensable for the development of the newly hatched young ones. In fish and many other oviparous vertebrates, the major constituents of the egg-yolk are synthesized as a precursor in the liver. The precursor is transported to the oocyte for uptake and cleaved into major yolk proteins lipovitellin, phosvitin and beta'-co...