No abstract

No abstract

Sodium cyanide, is highly contaminating aquatic ecosystems as a toxic pollutant, was investigated in the present study for acute toxicity on freshwater fish Labeo rohita. The toxicity tests were conducted by static renewal bioassay method on the juveniles of fish was evaluated. The LC 50 value of sodium cyanide to Labeo rohita was found out to be 320 µg l-1. One third (106 µg l-1) and one fifth (64 µg l-1) of the LC 50 value was selected for sublethal studies. Behavioural patterns and oxygen consumption were observed in both (1/3 rd and 1/5 th) sublethal concentrations (1, 5, 10 and 15 days). Sodium cyanide is highly toxic to the animal tested. Fish behaved irregular, erratic, and dartic movements, by followed hyperexcitability, loss of balance, finally settles to the bottom of the test chamber. A decrease in oxygen consumption was observed in 1/3rd (11.62% and-4.52%) and 1/5 th (9.11% and-2.82%) sublethal concentrations. Fish under sublethal concentration were found to be under stress but not fatal.

No abstract

A total of 132 species of birds belonging to 34 families under 11 orders were recorded during the study period between April 2007 to March 2008 in the Lakkavalli range forest, Bhadra Wildlife Sanctuary, Western Ghat, Karnataka, India. There were 112 resident, 12 winter migratory, 7 local migratory and one summer migratory birds, respectively. Among the birds recorded in the study area, about 49% were insectivores and other dominating types included mixed diet 25%, omnivores 11% carnivores 9%, granivores 3% and frugivores 3%, respectively. Species richness was maximum in the early winter and relatively less in other seasons.