Mudiganti Ram Krishna Rao

Fishes adopt themselves to some extent when natural waters have high BOD, heavy metals and ozone contamination. The present work studied the effects of hypoxia, anoxia, ozone, copper sulphate and a combination of copper sulphate + ozone on the lipid and hematological profiles of  Clarias batrachus. In case of lipid profile, total cholesterol level (195.5 ± 1.5) was highest in normal condition, triglyceride (204 ± 3.162), HDL (38 ± 1.224) and VLDL (40.75 ± 1.478) in 2 hour hypoxia, and LDL (129 ± 2.236) in copper sulphate + ozone treated condition. Analysis of blood samples showed elevation Hemoglobin level (9.7 ± 0.070) was highest in 4 hour hypoxia condition, RBC count ( 3 ± .070) and glucose level (186.75 ± 1.478)  in 2 hour hypoxia , PCV percentage (28 ± 0.707) in anoxia , and total protein in normal (6 ± 0.070) and 2 hour hypoxia (6 ± 0.141) conditions.

The present study reports the physiochemical and biological parameters of water and identification of organisms present in Kolavai Lake, Tamil Nadu, India. The lake is heavily polluted due to the dumping of municipal and agriculture wastes from surrounding localities.  Water samples were collected from different places across the lake and examined. Eleven microorganisms were identified by primary and secondary biochemical assays and two bacterial samples were sequenced with 16S rRNA regimen to identify the species. Obtained results were compared with standard values. The new bacterial species identified belonged to taxa Brevundimonas nasdae and Microbacterium trichothecenolyticum which are uncommon in this area.