B. S. Vermaa, S. K. Srivastavab* and D. K. Paulb
aDept. of Zoology, R. R. M. Campus, Janakpur, Tribhuvan University,Nepal.
b*Dept. of Zoology, Patna University, Patna ,Bihar, India- 800005
Received 25th Jan., 2012; Revised 28th June.,2012
Abstract : The present study is aimed to investigate periodical variation of different physicochemical parameters of water of a perennial pond. The pond is situated in Saidpur campus of Patna University. It is used for culture of water chestnut (Trapa bispinosa) and fish also. No scientific literature is available about the ecology of this pond. For the present study water samples were taken from an undisturbed fixed station for six consecutive months from April to September and analyzed. Methods of water sampling and physicochemical analysis were based on APHA . Water temperature ranged from 25°C to 31°C, having maximum in May. Light penetration depth was 12 cm to 19 cm. pH of water varied from 6.7 to 8.6, more basic in April and May. Value of total acidity, free CO2 and alkalinity ranged from 0.0 to 78.18 mg/l, 0.0 to 70.4mg/l and 226mg/l to 410mg/l respectively. Dissolved oxygen value was 3.36 mg/l in April, 2.44mg/l in May and no dissolved oxygen were in months June to September. Chloride varied from 56.8mg/l to 78.1mg/l. TS ranged from 68 mg/l to 75 mg/l and hardness as CaCO3 from 244 mg/l to 350 mg/l. It needs further study to investigate into the influence of physicochemical parameters on biodiversities and productivity as well as microbial study of this pond ecosystem.