A comparison of growth performance of Indian major carps, Catla catla (Hamilton) and Cirrhinus cirrhosus (Bloch) from natural and hatchery sources in Bangladesh
2008
Biswas, B.K.(Kinki Univ., Nachikatsuura, Wakayama (Japan). Fisheries Lab.) | Shah, S. | Takii, K. | Kumai, H.
Indian major carps, Catla catla and Cirrihinus cirrhosus from natural source of river were compared with hatchery source under the backdrop of popular claims of reduced growth rate of seed originated from the hatcheries. The seeds of natural and hatchery sources were originated from the river Halda, Chittagong, and local fry market, Jessore, Bangladesh, respectively. Rearing trial was performed for 8 weeks in 3 cubic m net cages set in an earthen pond. Fishes were sampled fortnightly for measuring body weight and length. C. catla fry from the natural source revealed 1.6% specific growth rate (SGR), 62.4% feed conversion efficiency (FCE), 1.5 condition factor (CF) and 93.3% survival, significantly higher than the fry from the hatchery with 0.8%, 28.0%, 1.4 and 89.3%, respectively. Also, C. cirrhosus from natural source revealed 2.0% SGR, 77.2% FCE, 1.1 CF and 94.7% survival, significantly higher than the fish from hatchery source with 0.8%, 24.3%, 1.0 and 90.7%, respectively. This could be attributed to breeding and broodstock management without proper genetic norms and practices often inviting inbreeding problems. Countermeasures for reducing inbreeding in brood stock populations are urgently required for the development of aquaculture industry.
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