Malaysian Applied Biology Journal

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05_SinghD

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Malays. Appl. Bio/. (June 2002) 31(1): 27-30

WATER QUALITY OF MAHESARA LAKE IN GORAKHPUR DISTRICT

SINGH, D.* and DEEPAK, P.K.

National Bureau of Fish Genetic Resources,

Canal Ring Road, P.O. Dilkusha

Lucknow-226002 (U.P.), India

ABSTRACT

Mahesara Lake (Rapti) is an important water body of Gorakhpur District. In this region, people are using synthetic pesticides/ pyrethroids for pest control in agricultural fields and other purposes. These pesticides are translocate in the aquatic ecosystem and shows adverse effect on aquatic organism. For the present study, the water samples collected from six different sampling stations during December - January, 2000 - 2001, respectively and physico chemical parameters were monitored. Accumulation features of total DDT also observed in all water samples and ranges from 0.002-0.069 (ftg/Lucknow). A low level of endosulfan (0.002 (jtg/L) was also detected in water samples collected from VI sampling station. Evidently, it is apparent that there is an urgent need, to take some hard decision needed for controlling the pesticidal magnification unless it will be become a great threat to fishes of this region.

ABSTRAK

Tasek Mahesara (Rapti) merupakan salah satu badan air yang penting di daerah Gorakhpur. Penduduk di kawasan ini menggunakan pelbagai pestisid untuk mengawal mahluk perosak. Pergerakan pestisid dari kawasan daratan ke dalam ekosistem akuatik akan memberi kesan negatif terhadap organisma akuatik. Untuk mengkaji kesan pencemaran ini, sampel air telah diambil dari Disember 2000 hingga Januari 2001. Julat kepekatan DDT dalam semua sampel didapati sekitar 0.002-0.069 /^g/L. Endosulfan juga telah dikesan stesyen VI tetapi pada kepekatan yang rendah (0.002 /ig/L). Hasil kajian ini menunjukkan bahawa langkah-langkah segera perlu diambil supaya kesan negatif terhadap ikan oleh pencemaran pestisid dapat dikurangkan.

Key words: Mahesara lake, water quality, Total BHC, Total DDT, endosulfan.

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