Ecology, Environment and Conservation Paper

Vol.09, Issue 04, 2003; Page No.(453-459)

PROSPECTS OF AQUACULTURE N A FRESHWATER POND OF JODHPUR IN RELATION TO ITS LIMNOLOGY

Anita Jhajhria

Abstract

This paper reports on the seasonal variations of different physico-chemical parameters and quality composition of plankton studied from the two sampling stations of the Shekhawat pond (26°49'02" North Latitude and 73°47'03" East Longitude) in Jodhpur between 8:30-1 1:30 a.m. from December I 998 to May 2000.A negative correlation occirred between temperature and dissolved oxygen (r= -0.470), dissolved oxygen and nitrate (r=-0.957), transparency and phytoplankton (r= -0.934), free CO2 and pH (r=-0.973), phosphate and nitrate with phytoplankton (r=-0.975 and -0.963) and phytoplankton with zooplankton (r=-0.924). Positive correlation was observed between pH and carbonate (r= +0.646), bicarbonates and total hardness (r=+0.983), total alkalinity and pH(r=+0.917), salinity and total hardness (r=+0.980) and dissolved oxygen with phytoplankton (r=+0.978).The pond was found suitable for aquaculture as low free CO2 (0-10 ppm), moderate dissolved oxygen (2.849 - 6.143 m1/1), alkaline pH (7.5 - 8.5), high alkalinity (76 - 180 ppm) coupled with abundant planktons (Zooplankton = 40 - 400 units/1; phytoplanktons = 300 - 1620 units/1) indicate the healthy nutrient rich aquatic environment of the pond.

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