Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)
- Volume 32 Issue 2
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- Pages.144-148
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- 1999
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- 0374-8111(pISSN)
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- 2287-8815(eISSN)
Effects of Feeding Frequency on Oxygen Consumption of Nile Tilapia, Oreochromis niloticus, in a Recirculating Aquaculture System
순환여과식 사육 시설에서 사료 공급 횟수에 따른 나일틸라피아, Oreochromis niloticus의 산소 소비량
- KIM Youhee (Department of Aquaculture, Pukyong National University) ;
- JO Jae-Yoon (Department of Aquaculture, Pukyong National University)
- Published : 1999.03.01
Abstract
This study was conducted to test actual oxygen consumption rates of Nile tilapia (Oreochromis niloticus) at a commercial scale high density culture tank in the recirculating culture system, with a special emphasis on the oxygen consumption rate of this species with different daily feeding frequencies. Nile tilapia, an average of 400 g and a total wright of 390 kg, were stocked in a circular concrete tank of 2.9 m in diameter and 0.8 m in depth, in a recirculating culture system. The fish were fed commercial diet 1, 2, 5, and 9 times per day between 09:00 h and 19:00 h. feed was evenly supplied where the fish were fed more than once a day. Dissolved oxygen of influent and effluent water was monitored every 50 seconds by a computer with electrodes for 24 hours. The standard metabolic rate of tilapia was
상업적 규모의 순환여과식 탱크에서 사료 공급 횟수에 따른 산소 소비량의 변화를 조사하였다. 실험에 이용된 사육 장치는 순환여과식 시설내의 원형 콘크리트 탱크 (직경 270cm, 높이 80cm)를 이용하여 평균 체중 400g의 나일틸라피아 (Oreochromis niloticus)를 390kg 방양하여 실험에 이용하였다. 우선 3일간 사육 어류를 절식시킨 후 기초대사율을 측정하였고, 사료 공급 횟수를 1회, 2회, 5회 그리고 9회로 나누어 공급한 후 산소 소비량의 일간 변화를 측정하였다. 절식 상태에서 산소 소비량 (기초대사율)은 평균