• 수산해양교육연구
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• 제25권3호
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• pp.553-563
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• 2013

This study was conducted to evaluate the quality characteristics (proximate composition, fatty acids, amino acids and sensory properties) of whole body and dorsal muscle in olive flounder, which is switch size from juvenile to growing fed extruded pellets (EP) and raw fish-based moist pellet (MP) for 9 months. Sample was collected at 5 and 9 months to compare with those of EP and MP. Whole body crude protein of fish fed EP at 9 months was significantly higher than that of fish fed MP (P<0.05). Linolenic acid(18:3) and n-6/n-3 ratio in dorsal muscle of fish fed EP were significantly higher than those of fish fed MP (P<0.05). No significant differences were observed in the results of the flavor, color, taste and texture of the muscle of the fish fed EP compared to those fed MP (P>0.05). Based on the experimental results, we concluded that olive flounder cultured with EP is not inferior to those fed MP for quality characteristics of whole body and muscle.

• 한국수산과학회지
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• 제42권5호
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• pp.476-480
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• 2009

This study was conducted to evaluate the effect of extruded pellets (EP) containing different levels of protein (51%-55%) and lipid (9%-15%) for growth of flounder (Paralichthys olivaceus) comparing with raw fish-based moist pellet (MP). Two replicate groups of 40 fish per each tank (initial mean weight 106 g) were fed one of three experimental EP (EP1, EP2 and EP3) containing different protein and lipid levels, a commercial EP (EP4) and MP for 16 weeks. Survival was not significantly different among all groups. Final mean weight of fish fed MP was significantly lower than that of fish fed EP1, EP2 and EP4 (P<0.05), but not significantly different from fish fed EP3. Feed efficiency of MP-fed fish was significantly lower than fish fed all EP formulations (P<0.05), but no significant difference was observed among the EP groups. Daily feed intake of MP-fed fish was significantly higher than fish fed all EP formulations (P<0.05). Condition factor was not significantly different among all groups. Whole body moisture and crude lipid contents were significantly affected by diet (P<0.05). Growth and feed efficiency of flounder was not affected by EP protein and lipid levels. Dietary formulation used in EP1, EP2 and EP3 can be applied to the practical feeding of flounder.

• 한국수산과학회지
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• 제47권6호
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• pp.810-817
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• 2014

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 $13.5{\pm}1.76g$) in experiment I, and as a group of 390 fish (initial mean weight $385{\pm}15.3g$) 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.

• 수산해양교육연구
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• 제22권4호
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• pp.529-536
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• 2010

This study was conducted to effect of extruded pellets (EPs) and moist pellet (MP) diet on growth and fish health parameters in farm cultured olive flounder Paralichthys olivaceus. Two replicate groups of 2,600 fish per each tank (initial weight of $30.1{\pm}0.2$ g) were fed one of the three EPs (EP1, EP2 and CEP) and one MP for 13 months. In field feeding experiment conducted in commercial flounder farm, survival, growth (30-600 g) and condition factor of fish fed experimental EP1 and EP2 were comparable to those of fish fed MP, but considerably higher feed efficiency and protein efficiency ratio were observed in fish fed experimental EPs. Viable cell counts from diet and water from MP diet were considerably higher than those from EP diet, and lysozyme activity from EP diet was higher than that from MP diet. GOT and GPT of fish fed the EP diet were considerably lower than those from MP group, but total protein and glucose concentration of fish fed the EP groups were not significantly different from that of fish fed the MP. Therefore, these results strongly suggest that EP diets could be developed to replace MP diet without adverse effects on growth performance and to enhance the immunity and protective ability of olive flounder against fish disease such as Vibro, Edwardsiella and Strptococcus.

• 수산해양교육연구
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• 제26권3호
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• pp.667-675
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• 2014

Two types of diets, extruded pellet (EP) and raw-fish-based moist pellet (MP) were fed to compare growth, water quality and histology of olive flounder, Paralichthys olivaceus in Jeju fish farm. Two groups of 7000 fish per each tank (initial mean weight 51 g) were fed one of two diets for 7 months. At the end of the feeding trial, significant differences were found in weight gain and feed utilization. Dissolved oxygen (DO) level of the MP tank was decreased from 7.98 to 6.89 after feeding. There were no significant differences in hematocrit, hemoglobin, alanine aminotransferase and aspartate aminotransferase of fish fed the two diets. Whole body protein content of fish fed the EP was significantly higher than that of fish fed the MP. While the feeding rate by month indicated numerically decreased, fish fed the MP had higher feed intake than that of fish fed the EP. Histological examination of hepatopancreas, kidney, and anterior intestine of fish fed the EP did not show any negative effects compared to those of fish fed the MP. This study revealed that EP could substitute for MP in terms of growth performance, blood parameters, water quality and histology of olive flounder.

• 한국양식학회지
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• 제18권4호
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• pp.287-292
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• 2005

본 연구는 넙치 육성용으로 실험 부상배합사료와 시판사료 및 생사료의 효능을 비교하기 위해 평균 체중 43.5 g의 넙치를 8주 동안 사육하였다. 실험사료로 4종류의 부상배합사료(EPl-EP4), 시판사료 4종류(EP5-EP8)및 습사료(MP)를 준비하여 1일 3회 만복으로 공급하였다. 사육실험 결과, 생존율은 모든 실험구에서 $85\%$ 이상으로 양호하였으며, 증중률은 EP2-EP4 실험구에서 가장 높은 값을 보였으며, EP6 실험구에서 가장 낮았다. 사료효율과 단백질효율은 MP 실험구에서 가장 낮은 값을 보인 반면, 일일 사료섭취율과 일일 단백질섭취율은 MP 실험구에서 가장 높은 값을 보였다. 어체의 단백질 함량은 실험구간에 유의한 차이가 없었으나, 수분, 지질 및 회분 함량은 사료에 따라 유의한 차이를 보였다. 혈액의 총 단백질은 모든 실험구간에 유의한 차이가 없었으며 , 중성지방은 EP3 실험구에서 높은 값을 보이긴 하였지만, EP7 실험구를 제외한 모든 실험구간에 유의한 차이는 없었다. 이상의 결과들로 보아 평균체중 42 g${\~}$108 g인 넙치의 성장을 위해 EP2-EP4를 공급하여도 좋을 것으로 판단된다.

• 한국어병학회지
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• 제22권3호
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• pp.283-291
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• 2009

2008년 7월부터 12월까지 양식장 2개소에서 사육중인 넙치를 대상으로 상업용 배합사료 (extruded pellet, EP) 및 습사료 (raw fish moist pellet, MP)를 급이하고, 시험 사료별로 병원체 검출률과 혈액학적 성상의 차이를 조사하였다. 그 결과, EP 사료를 먹인 시험구 (EP 그룹)가 MP 사료를 먹인 시험구 (MP 그룹)에 비해 혈청 GOT, GPT 및 glucose 성분이 높게 나타났다. 시험기간 동안의 평균 생존율과 병원체 검출률에서는 뚜렷한 차이가 없는 것으로 나타났으나, 계절적으로 수온이 높은 7월부터 10월까지 EP 그룹에 비해 MP 그룹에서 병원체 검출률이 높게 나타났다. EP 그룹에서는 Dactylogyrus sp., E. tarda 및 red seabream iridovirus (RSIV)가 주로 검출되었으며, MP 그룹에서는 Trichodina sp., Streptococcus spp. 및 viral nervous necrosis virus (VNNV)가 우점적으로 검출되었다.

• 한국양식학회지
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• 제21권2호
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• pp.102-106
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• 2008

본 연구는 미성어기 넙치 사육용으로 부상배합사료를 제조하여 습사료와 그 효능을 비교함으로써 넙치 배합사료 개발을 위한 자료를 제공하고자 수행되었다. 최초 평균체중 594g의 실험어를 6개의 15톤 수조에 150마리씩 사료별 2반복으로 수용하여, 실험 부상배합사료 2종류와 습사료를 1일 2회 만복으로 공급하며 32주간 사육하였다. 사육기간 동안의 평균수온은 $13.2{\pm}4.0^{\circ}C$였다. 생존율은 실험구 간에 유의한 차이가 없었다. 최종체중은 MP 실험구가 EP1과는 차이가 없었으나, EP2 보다는 높았다. 사료효율은 MP 실험구가 EP 실험구보다 낮았으며, 사료섭취율은 MP가 EP 실험구보다 높았다. 실험어의 비만도는 모든 실험구 간에 차이가 없었다. 사육실험 종료 후, 실험어 등근육의 수분, 조단백질 및 조지질 함량은 실험사료에 유의한 영향을 받았다. 이상의 결과로부터, 본 연구에 사용된 EP의 사료조성은 미성어기에서 상품크기의 넙치 사육을 위한 MP 대체 배합사료 개발에 도움이 될 것으로 판단된다.

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 2000년도 춘계수산관련학회 공동학술대회발표요지집
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• pp.320-321
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• 2000

점농어, Lateolabrax maculatus는 담수적응력이 강할 뿐만 아니라 수온변화에도 강 특히 남해안과 서해안의 폐염전을 활용한 축제식 양식대상어종으로 선호하고 있는 실정이다. 다른 농어에 비해 성장이 빠르며 최근 인공종묘생산이 가능해짐에 따라 양식생산량이 증가하는 추세이다. 축제식 양식장어 적합한 점농어 전용사료가 개발되지 않아 대부분 숭어사료(Extruded Pellet, EP)를 급이 하거나 대만산 농어사료를 수입하여 급이 하고 있는 실정이다. 대만산 사료의 경우는 가격이 비싸 어민들이 기피하고 있는 설정이다. 점농어의 대량생산을 위해서는 이종에 적합한 EP사료가 개발되어야 할 것이다. 사료는 양식경영비의 절반이상을 차지하는 중요한 요소로 경제적이고 품질이 우수한 사료의 안정적 확보가 양식경영을 향상시킬 수 있다. (중략)

• 한국수산과학회지
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• 제47권6호
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• pp.785-789
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• 2014

An experiment was conducted to investigate the effects of feeding by different feed types (powder, crumble and pellet) of two different feed formulations with simple dried (D) or extruded (E) conditions on growth and body composition of juvenile sea cucumber Apostichopus japonicus. Triplicate groups of sea cucumber averaging $1.2{\pm}0.05g$ were fed each of the D1, D2, EP1 or EP2 diets for 12 weeks. Survival of sea cucumber fed D2-crumble was higher than that fed EP2-crumble diet (P<0.05). Weight gain of sea cucumber fed EP1-powder was higher than that fed EP1-crumble and EP2-crumble diets (P<0.05). These findings indicated that simple dried feed could use independently feed type for sea cucumber culture and powder type of extruded feed is also good for sea cucumber culture.