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The aim of the current study was to examine the gonadosomatic index fluctuations of Cyprinus carpio communis and Carassius carassius at different sites of dal lake Kashmir. The monthly fluctuations in gonadosomatic index in Cyprinus carpio communis ranged from a minimum of 2.49±0.14-2.52±0.10 in male in June and 3.30±0.17 _ 3.30±0.17 in female in July and from a maximum of 9.84± 0.51 _ 9.94±0.46 in male and 15.29±0.04 _ 15.52±0.06 in female in May. Seasonal fluctuations in gonadosomatic index in Cyprinus carpio communis ranged from a minimum of 3.56±0.70 _ 3.85±0.85 in male and 3.84±0.37 _ 3.96±0.41 in female in summer and from a maximum of 8.22±0.96 _ 8.93±0.50 in male and 13.44±0.62 _ 13.61±1.07 in female in spring. The monthly fluctuations in gonadosomatic index in Carassius carassius ranged from a minimum of 3.83±0.30-3.91±0.34 in male in October and 11.60±0.48-11.89±0.37 in female in April and from a maximum of 9.84± 0.51 _ 15.29±0.04 in male and 9.94±0.46 _ 15.52±0.04 in female in April. Seasonal fluctuations in gonadosomatic index in Carassius carassius ranged from a minimum of 4.80±0.31 _ 4.98±0.60 in male and 5.67±1.14 _ 5.85±1.22 in female in winter and from a maximum of 8.70±1.83 _ 8.80±1.89 in male and 8.90±1.59 _ 9.22±1.62 in female in spring. The Gonadosomatic Index in both the species revealed a significant variation between sites, months, and seasons of Dal Lake.

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