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사료원료 공급량 및 스크류 회전속도를 달리하여 제조한 배합사료가 넙치(Paralichthys olivaceus)의 성장 및 체조성에 미치는 영향
김경덕 ( Kyoung Duck Kim ),김강웅 ( Kang Woong Kim ),이봉주 ( Bong Joo Lee ),배기민 ( Ki Min Bae ),안철민 ( Cheul Min An ),한현섭 ( Hyun Sob Han ) 한국수산과학회 2014 한국수산과학회지 Vol.47 No.5
The aim of this study was to investigate the effect of diet extruder conditions, such as feed-loading rate and screw speed, on growth performance and biochemical responses in olive flounder Paralichthys olivaceus. Over 8 wks, we used four identical diets (triplicated per treatment) with differing ratios of feed-loading rate (kg/h):screw speed (rpm/min) in a laboratory-scaled twin-screw extruder of 50:640, 80:640, 120:640, and 80:400, designated as EP1, EP2, EP3, and EP4, respectively. Screw speed impacted the buoyancy of experimental diets. Diets produced at a screw speed of 640 rpm/min floated for > 24 hrs, whereas those produced at a speed of 400 rpm/min sank between 10 s and 5 min. Fish that were fed EP1 and EP4 diets grew significantly faster than those fed EP2 and EP3 diets. Fish fed EP1 diets ate and gained weight most efficiently among treatments, a result that is likely to be related to feed-loading rate, i.e., ingredients extruded at a low feed-loading rate may have more time to cook in the pre-conditioner of the extruder. A cooked diet may be easier to digest in fish. Fish fed EP4 diets also showed significant weight gain, as compared to those fed EP2 and EP3 diets. However, we found no differences among treatments in proximate compositions of dorsal muscle, liver, and viscera of fish. Our results suggest that extruder conditions, may influence feed quality, impacting feed efficiency and growth of fish.
어린 해삼(Apostichopus japonicus)용 사료 개발을 위한 실험사료의 사육효능 평가
김경덕,배기민,김강웅,이봉주,허상우,장지원,한현섭,Kim, Kyoung-Duck,Bae, Ki-Min,Kim, Kang-Woong,Lee, Bong-Joo,Hur, Sang-Woo,Jang, Ji Won,Han, Hyon-Sob 한국수산과학회 2017 한국수산과학회지 Vol.50 No.4
Six experimental diets for juvenile sea cucumbers Apostichopus japonicus were evaluated and compared with current commercial diets. Sea cucumbers (50 per tank; initial mean weight $2.3{\pm}0.1g$) in three replicates of seven groups were fed one of six experimental diets (ED1, 20% wild-harvested Sargassum thunbergii powder; ED2, 20% commercial S. thunbergii powder; ED3, 20% Undaria pinnatifida and Ascophyllum nodosum powders; ED4, 40% U. pinnatifida and A. nodosum powders; ED5, 10% brewer's yeast; and ED6, 10% sea shell powder) or a commercial diet (CD) for 28 weeks. The survival rate in all groups was 85-94%, with no significant difference among the experimental groups. The mean body weight of the sea cucumbers was significantly different among the experimental groups 6 weeks after the feeding trial. The final mean weight of the sea cucumbers was highest in ED1, ED3, and ED4, followed by ED6, ED5, ED2, and CD, in decreasing order. The results of this study suggest that U. pinnatifida and A. nodosum powders could provide a substitute for the S. thunbergii powder commonly used in commercial sea cucumber diets. Thus, the EP4 diet formulation, which contains no S. thunbergii, could be used as a practical feed for juvenile sea cucumbers.
배합사료 내 펄 분말 첨가가 어린 해삼(Apostichopus japonicus)의 성장 및 체조성에 미치는 영향
김경덕 ( Kyoung Duck Kim ),배기민 ( Ki Min Bae ),한현섭 ( Hyon Sob Han ),김강웅 ( Kang Woong Kim ),이봉주 ( Bong Joo Lee ),김성삼 ( Sung Sam Kim ),박기영 ( Kie Young Park ),권오남 ( O Nam Kwon ) 한국수산과학회 2016 한국수산과학회지 Vol.49 No.1
This study investigated the effects of dietary inclusion of sea mud on growth and body composition of juvenile sea cucumber Apostichopus japonicus. In experiment 1, three experimental diets containing sea mud at the level of 0, 30 and 60% were prepared. After feeding trial for 7 weeks, survival was not significantly different among groups. Final mean weight of sea cucumber fed the experimental diet without sea mud supplementation was significantly higher than that of sea cucumber fed the diet containing 30 and 60% sea mud. In experiment 2, three experimental dietscontaining sea mud at the levels of 0, 15 and 30% were prepared. After feeding trial for 19 weeks, survival was not significantly different among groups. Final mean weight of sea cucumber fed the diet without sea mud supplementation was not significantly different from that of 15%, but was significantly higher than that of sea cucumber fed the diet containing 30% sea mud. It was concluded that dietary inclusion of sea mud may inhibit growth of sea cucumber.
타피오카 전분을 이용한 넙치( Paralichthys olivaceus )용 고효율 배합사료 개발
김강웅 ( Kang Woong Kim ),이진혁 ( Jin Hyuck Lee ),배기민 ( Ki Min Bae ),김경덕 ( Kyoung Duck Kim ),이봉주 ( Bong Joo Lee ),한현섭 ( Hyon Sob Han ),이경준 ( Kyeong Jun Lee ),김성삼 ( Sung Sam Kim ) 한국수산과학회 2014 한국수산과학회지 Vol.47 No.6
This study compared the effects of feeding diets consisting of an experimental extruded pellet with tapioca starch (EEP), commercial extruded pellet (CEP), and raw-fish-based pellet (MP) on the growth, flesh quality, and apparent digestibility coefficient of the olive flounder Paralichthys olivaceus . Two replicated groups of 4,000 fish each (initial mean weight: 81.8±3.5 g) were fed one of the experimental diets for 5 months. After the feeding trial, the final mean weight, weight gain, specific growth rate, and feed efficiency of fish fed the EEP was significantly higher than those of fish fed the CEP and MP. Moisture content in the whole-body of fish fed MP was significantly higher than those of fish fed other diets. However, the highest crude protein in the whole-body was found in fish groups fed the EEP. Significantly higher contents of 24:1n-9, 20:5n-3, 22:6n-3 and lower 18:1n-7 was observed in fish fed the EEP compared with fish fed the MP. The amino acid contents in the whole-body showed significant differences in the composition depending on the feed, but the distribution of free amino acids showed similar patterns. Among amino acids, glutamic acid showed the highest content in all the experimental groups, and the threonine, cysteine, and lysine contents were significantly higher in the groups fed with EEP and CEP than in the group fed with MP. Digestibility of nutrients of the EEP was significantly higher than that of fish fed the CEP. This suggests that extruded pellets can be used to feed olive flounder without compromising growth and flesh quality in comparison to raw-fish-based moist pellets. Formulation of the EEP could be used as a practical feed for olive flounder.
실험 배합사료, 상품사료 및 생사료 공급이육성기 조피볼락(Sebastes schlegeli)의 성장, 육질 및조직 성상에 미치는 영향
김경덕 ( Kyoung Duck Kim ),김강웅 ( Kang Woong Kim ),이봉주 ( Bong Joo Lee ),배기민 ( Ki Min Bae ),서정수 ( Jung Soo Seo ),안철민 ( Cheul Min An ),한현섭 ( Hyon Sob Han ) 한국수산과학회 2013 한국수산과학회지 Vol.46 No.6
This study compared the effects of diets consisting of experimental extruded pellets (EP), commercial soft extruded pellets (SEP),and raw-fish-based moist pellets (MP) on the growth, flesh quality, and histology of the Korean rockfish Sebastes schlegeli. Three replicated groups of 60 fish each (initial mean weight 152 g) were fed one of two experimental EPs (EP1 and EP2), two commercial SEPs (SEP1 and SEP2), or MP for 11 weeks. The survival, weight gain, and final mean weight of the fish did not differ significantly among the groups. The highest feed efficiency was in fish fed MP (P<0.05), and the protein efficiency ratio of fish fed MP was significantly higher than that of fish fed EP1, EP2, or SEP1, but not significantly different from that of fish fed EP2. The daily feed intake of the fish fed the EPs and SEPs was significantly higher than that of the fish fed MP (P<0.05). The condition factor,Hepatosomatic Index, and Viscerasomatic Index of the fish did not differ significantly among the groups. No notable differences in the textural properties of the dorsal muscle, plasma biochemical parameters, or histological features of the fish were observed in fish fed any diet. This suggests that extruded pellets can be used to feed growing Korean rockfish without compromising growth,flesh quality, or histopathological change in comparison to raw fish-based moist pellets.
배합사료 및 습사료 공급에 따른 넙치( Paralichthys olivaceus )의 성장 및 어체성분 비교
김강웅 ( Kang Woong Kim ),이진혁 ( Jin Hyuck Lee ),배기민 ( Ki Min Bae ),김경덕 ( Kyoung Duck Kim ),이봉주 ( Bong Joo Lee ),한현섭 ( Hyon Sob Han ),김성삼 ( Sung Sam Kim ) 한국수산과학회 2014 한국수산과학회지 Vol.47 No.6
Two consecutive feeding trials were conducted to evaluate the effects of extruded pellet (EP) and raw fish-based moist pellet (MP) in the juvenile (experiment I) and sub-adult (experiment II) stages of olive flounder, Paralichthys olivaceus . The fish were distributed randomly to three aquarium tanks, as a group of 1,200 fish (initial mean weight 13.5±1.76 g) in experiment I, and as a group of 390 fish (initial mean weight 385±15.3 g) in experiment II. In experiment I, the weight gain, specific growth rate, feed efficiency, protein efficiency ratio, and survival of fish fed EP were all significantly higher than those of fish fed MP. In experiment II, no significant differences were observed in weight gain, specific growth rate and survival between the EP and MP groups. However, the feed efficiency and protein efficiency ratios of fish fed EP were significantly higher than those of fish fed MP. The results of this study indicate that EP could be developed to replace MP for market size production of olive flounder without any adverse effects on the growth performance. The dietary formulation used in this study could be used as an appropriate feed for olive flounder.
사료 공급일수 및 공급율이 육성기 넙치 (Paralichthys olivaceus)의 성장에 미치는 영향
김경덕 ( Kyoung Duck Kim ),김강웅 ( Kang Woong Kim ),배기민 ( Ki Min Bae ),손맹현 ( Maeng Hyun Son ),안철민 ( Cheul Min An ) 한국수산과학회(구 한국수산학회) 2012 한국수산과학회지 Vol.45 No.5
This study evaluated the effects of the number of feeding days and feeding rate on the growth of growing-out flounder Paralichthvs olivacesis. Three replicated groups of fish (14 1±1.9 g) were hand-fed a commercial feed under different feeding regimes for 9 weeks. Fish in group 6F-J S were fed to satiation twice daily for 6 consecutive days and starved for I day. Fish in groups 4F-IS and 3F-IS were fed to satiation twice daily for 4 and 3 days, respectively, and starved for 1 day. Fish in group 6F-90% were fed a diet of 90% of 6F- IS twice daily for 6 consecutive days and starved for I day. The weight gain, feed efficiency and daily feed intake of the fish groups in 4F-IS and 3F-1S were not significantly different from those of group 6F-lS. The weight gain and feed efficiency of fish in group 6F-90% were not significantly different from those of group 6F- IS. The results of this study suggest that the growth of growing-out flounder fed to satiation twice daily for 4 or 3 days after starving I day was similar to that of fish fed to satiation for 6 days, and that the proper feeding rate for growth could be lowered to 90% of satiation without growth suppression.
해조류 분말 종류를 다르게 첨가한 배합사료가 어린 해삼(Apostichopus japonicus)의 성장 및 체조성에 미치는 영향
김경덕 ( Kyoung-duck Kim ),김강웅 ( Kang-woong Kim ),이봉주 ( Bong-joo Lee ),한현섭 ( Hyon-sob Han ),배기민 ( Ki-min Bae ) 한국수산과학회(구 한국수산학회) 2018 한국수산과학회지 Vol.51 No.2
This study was conducted to investigate the effects of practical diets containing different seaweed powders on the growth and body composition of juvenile sea cucumber Apostichopus japonicus. Six experimental diets were formulated to contain 40% of the following seaweed powders: Sargassum thunbergii (ST), Undaria pinnatifida (UP), Ascophyllum nodosum (AN), Hizikia fusiformis (HF), fermented Laminaria japonica (FLJ), and fermented Hizikia fusiformis (FHF). Sea cucumbers (30 per tank; initial mean weight 0.4±0.01 g) in three replicates of six groups were fed one of the six experimental diets for 15 weeks. Survival in all groups was 83-93%, with no significant differences among the experimental groups. The specific growth rates of the sea cucumbers fed the ST and UP diets were significantly higher than those of sea cucumbers fed the HF, FLJ, and FHF diets, but did not significantly differ from those of sea cucumbers fed the AN diet. The results of this study suggest that S. thunbergii, U. pinnatifida, and A. nodosum could be useful sources of seaweed powder for practical diets of juvenile sea cucumber.