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자료유형
학술저널
저자정보
저널정보
한국수산과학회 Fisheries and Aquatic Sciences Fisheries and Aquatic Sciences 제18권 제4호
발행연도
2015.1
수록면
373 - 378 (6page)

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Postprandial ammonia excretion and oxygen consumption in olive flounder Paralichthys olivaceus fed two different feed types, moist pellet (MP) and expanded pellet (EP) diets, to satiation were determined at 12°C, 15°C, 20°C, and 25°C for 48 h. The ammonia excretion and oxygen consumption rates increased with increasing water temperature. However, the postprandial times for the maximum rates of ammonia excretion and oxygen consumption were shortened from 12 h to 6 h after feeding with increasing water temperature. The ammonia excretion and oxygen consumption rates of fish fed EP were significantly higher (P < 0.05) than those fed MP at 12 h post-feeding both for 12°C and 15°C. The highest (P < 0.05) weight-specific ammonia excretion rates at 12°C were observed in fish fed EP and MP at 12.1 mg NH3-N kg–1h–1 and 8.7 mg NH3-N kg–1h–1, respectively, for 12 h and 9 h after feeding. The highest (P < 0.05) weight-specific oxygen consumption rates at 12°C were observed in fish fed EP and MP at 116.4 mg kg-1h-1 and 101.0 mg kg-1h-1, respectively, for 12 h after feeding. The highest ammonia excretion rates at 25°C in fish fed EP and MP increased to 16.9 mg NH3-N kg–1h–1 and 18.3 mg NH3-N kg–1h–1, respectively, for 6 h after feeding. The highest (P < 0.05) weight-specific oxygen consumption rates at 25°C were observed in fish fed EP and MP at 184.3 mg O2 kg–1h–1 and 197.3 mg O2 kg–1h–1, respectively. These data are extremely valuable for the design of biofilters and development of effluent treatment technologies for land-based flounder farms.

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