연구논문 : 배합사료의 크기, 공급횟수 그리고 사육밀도가 조피볼락 (Sebastes schlegelii) 치어의 성장에 미치는 영향
분야
수해양 > 수산생물학
저자
오대한 ( Dae Han Oh ) , 송진우 ( Jin Woo Song ) , 김민기 ( Min Gi Kim ) , 이봉주 ( Bong Joo Lee ) , 김강웅 ( Kang Woong Kim ) , 한현섭 ( Hyon Sob Han ) , 이경준 ( Kyeong Jun Lee )
발행기관
한국수산과학회(구 한국수산학회)
간행물정보
한국수산과학회지 2013년, 제46권 제4호, 407~412페이지(총6페이지)
파일형식
05907544.pdf [무료 PDF 뷰어 다운로드]
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    영문초록
    We performed four sets of feeding trials to establish optimum feed size (Exp-I), stocking density (Exp-II) and feeding frequency (Exp-III and IV) for Korean rockfish. In Exp-I, three different particle sizes of a commercial diet (small, 2.0-2.1 mm; medium, 2.4-3.2 mm; and large, 4.0-5.3 mm) were fed to four replicate groups of fish (22.8±0.1g), each of which was fed to apparent satiation for six weeks. In Exp-II, fish (44.3±0.4 g) were reared at four stocking densities (1.5, 3.0, 4.5 and 6.0 kg/m3) and fed a commercial diet to apparent satiation for four weeks. In Exp-III, fish (14.8±0.1 g) were fed a commercial diet once, twice, thrice, 4× or 5× a day at a feeding ratio of 3.25% of body mass. Another group of fish was fed the same commercial diet 5× a day to apparent satiation; this treatment was designated FS (five times satiation/day). In Exp-IV, fish (31.3±0.1 g) were fed a commercial diet once, twice, thrice or 4× a day to apparent satiation. Another group of fish was fed to apparent satiation once every 48 hours. In Exp-I, fish fed the large particle (4.0-5.3 mm) diet had a significantly higher feed conversion ratio and lower protein efficiency ratio than fish fed the small particle diet. In Exp-II, groups of fish reared at densities of 4.5 and 6.0 kg/m3 had significantly higher feed intake and growth performance than fish reared at 1.5 and 3.0 kg/m3. In Exp-III, fish fed to apparent satiation had significantly higher growth performances than fish fed once or 4× a day. A significantly higher feed conversion ratio and a lower protein efficiency ratio were obtained in the FS group. In Exp-IV, growth performance and feed utilization efficiency were not significantly affected by experimental variation in feeding frequency. Fish fed to apparent satiation once every 48 hours had better feed utilization than those in other treatments and growth performances of those were comparable. Therefore, the optimum feed particle size, stocking density and feeding frequency for Korean rockfish under conditions we used were 2.0-3.2 mm, 4.5-6.0 kg/m3, and once a day or once every 48 hour, respectively.
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