Author(s): NC Ujjania, E Ansari, M Gadhia and PK Gadhia

Abstract: Growth of Indian major carps (Catla catla, Labeo rohita and Cirrhinus mrigala) reared in Guard pond containing treated wastewater of petrochemical industry (Oil and Natural Gas Corporation, Hazira, India) was investigated. Fingerlings of selected species were stocked at 9000/ha in ratio of 1:4:2 and reared for one year. Growth parameters viz., total length, standard length and weight of fishes were also measured quarterly. During the study period it was observed that catla attained 35.69±0.36 cm total length, 28.32±0.31 cm standard length and 546.54±18.96 gm weight; rohu attained 36.13±0.36 cm total length, 29.12±0.17 cm standard length and 551.46±17.23 gm weight while mrigal attained 33.50±0.22 cm total length, 27.56±0.21 cm standard length and 385.00±8.89 gm weight. Study revealed that maximum growth was observed in rohu compared to other fish (catla and mrigal) due to abundance of phytoplankton which is food rohu. Water qualities of treated water of ONGC were conducive for fish farming and growth of fishes was satisfactory.

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