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Impact of Aeration on the Growth Performance of Silver Barb, Puntius gonionotus, during Fingerling Rearing


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Impact of aeration on growth of silver barb, Puntius gonionotus during fingerling rearing was studied through a 100-d rearing experiment conducted in 18 concrete tanks of 50 m2 (10 × 5 × 1.2 m) size. Fry (0.74 ± 0.27 g, 35 ± 6 mm) were stocked in the experimental tanks at three stocking densities (25, 50, and 75 fry/m2) and were evaluated with and without provision of 6 h (2400–0600 h) of night time aeration. Aeration resulted in higher pH and dissolved oxygen regime and increased fingerling length and weight. The results suggest a rearing density of 75/m2 to be ideal for rearing fry to fingerling of this species when aeration is provided, whereas, under non-aerated condition, rearing the fry to fingerling stage at 50/m2 was found advantageous over those at 25 and 75/m2.