An attempt has been made in the present investigation to determine the acute toxicity of hexavalent chromium and its toxicological effects on survival, physiological, hematological and biochemical parameters of the widely consumed Indian major carp, Labeo rohita. Short-term acute toxicity tests were performed adopting renewal bioassay technique (USEPA, 1975) over a period of 96 h, using different concentrations of potassium dichromate to the fish and the 96 h LC[50] value was found to be 111.45 mg/l (Cr(+6) as 39.40 mg/l). ANOVA results showed that the normal respiratory activity of the fish was significantly affected and there is a depression in the metabolic rate at the end of 24, 48, 72 and 96 h exposure. The metal also induced significant decrease (p<0.001) in the hematological parameters of the fish like total erythrocyte count, hemoglobin percent and absolute value Mean cell hemoglobin (MCH) both at the end of 24h and 96 h exposure indicating anemia. Appreciable decline in the biochemical profiles such as total glycogen, total lipids and total protein contents of the fish was also observed. However, the decrease in protein content was significant only at the end of 96 h. This study reflects the extent of the toxic effects of hexavalent chromium and the metal induced cumulative deleterious effects at various functional levels in the widely consumed freshwater fish, Labeo rohita.

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Acute Effects of Hexavalent Chromium on Survival, Oxygen Consumption, Hematological Parameters and Some Biochemical Profiles of the Indian Major Carp, Labeo rohita

https://repository.ubn.ru.nl/bitstream/handle/2066/16686/10874.pdf

Effect of ambient and dietary cadmium on pavement cells, chloride cells, and Na+/K+-ATPase activity in the gills of the freshwater teleost Oreochromis mossambicus at normal and high calcium levels in the ambient water

Effects of water-borne cadmium on plasma cortisol and glucose in the cichlid fish Oreochromis mossambicus

Lipid water barriers in biological systems.

Mercury alters the function of proteins by reacting with cysteinyl sulfhydryl (SH−) groups. The inorganic form (Hg2+) is toxic to epithelial tissues and interacts with various transport proteins in...

https://www.physiology.org/doi/pdf/10.1152/ajpcell.1999.277.4.C684

Inhibition of Na(+)-K(+)-2Cl(-) cotransport by mercury.

Histological observations in gills of the teleost Sarotherodon mossambicus with reference to mercury toxicity.

Phreodrilus (Phreodrilus) branchiatus (Beddard, 1894) is reported for the first time in the eastern hemisphere from Tasmania. Phreodrilus (Phreodrilus) mauienensis Brinkhurst, 1971 is reported for the first time from Australia and Tasmania.

Two species of phreodrilidae (oligochaeta) new to Australia and Tasmania

Histological alterations in liver and intestine of teleost Sarotherodon mossambicus in response to mercury toxicity

Nais pseudobtusa Piquet, 1906 is reported for the first time from Australia.

K. Abhinender Naidu

Papers

Histological observations in gills of the teleost Sarotherodon mossambicus with reference to mercury toxicity.

Two species of phreodrilidae (oligochaeta) new to Australia and Tasmania

Histological alterations in liver and intestine of teleost Sarotherodon mossambicus in response to mercury toxicity

Nais pseudobtusa Piguet, 1906 (Oligochaeta: Naididae) New to Australia

Water diffusion, ion transport and lipid composition of the skin of Rana cyanophlyctis Schneider under osmotic stress