Limnological study of Shuksagaor Lake in Dinajpur District

Abstract

Shuksagar, a manmade lake and famous eco-park of Dinajpur district was studied
from February to July 2018 in order to observe the present condition of physico-chemical
water quality parametersas well as the abundance of planktonic community. Three sites
inside the lake were selected for research purpose. Water samples were collected fortnightly
from the selected sites and analyzed. Most of the parameters of water were found in suitable
ranges. The observed ranged of water temperature of Suksagar reservoir was within the
productive range (16° to 32°C). The average (±SD) values of transparency were
29.97±5.17, 30.20±4.99 and 30.53±4.82 cm in three sites. The highest water temperature
(35.50C) was recorded in the month of July while the lowest temperature was found 190C in
February.The alkalinity ranged from 58 to 124 mg/l during the study period. While the
maximum (10.60 mg/l) and minimum (4.8 mg/l) dissolved oxygen concentration occurred
in site 1 during the month of April and February. The highest pH value was found as 10.70
at site 3 during the month of February and the lowest (5.5) at site 2 during the month of
May. Twenty two phytoplankton species and 8 zooplankton species were detected in the
lake. Total phytoplankton abundance was found higher (25.90×103cell/l) in the month of
February, whereas the minimum value was observed (5.07×103cell/l) during
April.Chlorophyceae was found to be dominant throughout the study period followed by
Bacillariophyceae, Cyanophyceae and Euglenophyceae. The relative abundance of different
planktonic groups and other limnological condition indicate that the Shuksagarreservoir is
suitable for fish culture and for the survival of other aquatic life.