• Journal of Aquaculture
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• v.9 no.3
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• pp.255-264
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• 1996

A 15-week growth trial was conducted to evaluate the economical feed formulations for Korean rockfish (Sebastes sehlegeli). Three replicate groups of fish averaging 33 g were fed one of 8 isoproteic ($49\%$) and isolipidic ($8\%$) diets containing various practical ingredients such as fish meal, meat meal, feather meal, blood meal, soybean meal, corn gluten meal, and wheat flour with or without supplemental essential amino acids. A control diet with white fish meal and brown fish meal as the only protein sources was included. Practical ingredients were substituted from $40\%$ up to $65\%$ for portions of the fish meals in the control diet. Essential amino acids (EAA) were added to the diets for balancing EAA composition of each dietary protein source. In addition, these experimental diets were compared with raw fish-based moist pellet containing $50\%$ frozen horse mackerel and $50\%$ commercial binder meal. Results indicated that animal and plant protein sources could substitute for fish meal up to $55\%$ in diet without any adverse effects on growth and chemical composition of fish. Fish growth, body composition, nutrient utilization, and cost of fish production are discussed in relation to nutritional values of the dietary protein sources.

• Journal of Aquaculture
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• v.9 no.4
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• pp.377-384
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• 1996

A 15-week of growth trial was conducted to evaluate practical diets for growing Korean rockfish (Sebastes schlegeli). Two replicate groups of the fish average weighing 125 g were fed one of four experimental diets containing $41\~45\%$ protein and $6\~8\%$ lipid. A control diet with $58\%$ fish meal as protein source was included and practical form diets with $40\%$ fish meal and various practical ingredients such as meat meal, blood meal, soybean meal, and corn gluten meal were included. These experimental dry pellet diets were compared with commercial diets containing $51\~53\%$ protein and $5\~13\%$ lipid for marine fish or raw fish-based moist pellet (RMP) diet containing $58\%$ protein and $9\%$ lipid consisted of $50\%$ frozen horse mackerel and $50\%$ commercial binder meal. Weight gain, feed efficiency, daily feed intake and protein efficiency ratio in the fish fed the experimental diets and commercial diets were not significantly different to those in the fish fed the control diet. However weight gain, feed efficiency and protein efficiency ratio in the fish fed the RMP diet were significantly higher than those in the fish fed the experimental diets and commercial diets. These differences of growth performance between experimental diets and RMP diet may be reason for different dietary protein and energy levels. The experimental diet can save up to $20\%$ cost of fish production compare with control diet, whereas RMP diet is more expensive than other diets in the fish production.

• Journal of Aquaculture
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• v.9 no.4
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• pp.385-394
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• 1996

A 15-week feeding experiment was conducted to determine the effects of feeding frequency from 2 different formulated diets on growth, feed efficiency and body composition in juvenile Korean rockfish (Sebastes schlegeli). Duplicate groups of the 30 fish averaging 25 g were fed the control diet containing $58\%$ fish meal and the experimental diet containing $40\%$ fish meal, $10\%$ meat meal, $3\%$ corn gluten meal, $3\%$ soybean meal, and $3\%$ blood meal as protein sources at different feeding frequencies of 2 times daily, once a day in the morning or afternoon, once in 2 days, or given no food. Growth and feed efficiency of the fish were affected by diets (P<0.05), whereas these values were unaffected by feeding frequencies (P>0.05). Feed intake (${\%}$ of body wt.) of the fish fed once in 2 days was lower than that of the fish fed 2 times daily and once a day (P<0.05), Moisture, protein, lipid and ash contents of liver and muscle were not influenced by different diets and feeding frequencies (P>0.05). These results indicate that once a day or once in 2 days feeding regimen must be more effective and economical than that of 2 times daily for juvenile Korean rorkfish.

• Korean Journal of Food Science and Technology
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• v.39 no.6
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• pp.630-636
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• 2007

Acidic citrus juices obtained from C. natsudaidai and C. grandis were electrodialyzed with bipolar and organic acid selective membrane (ion exchange membrane) cartridges. The pH levels of the acidic citrus juices gradually increased to 14.5% (C. grandis) and 25.2% (C. natsudaidai) by electrodialysis with the bipolar membranes, while levels remained consistent when organic acid selective membranes were applied. The total acidity levels decreased more with the organic selective membrane than with the bipolar membrane. Conductivity rose with the bipolar membranes while the value continued to fall rapidly with the organic selective membranes. Sugar and flavonoid contents remained relatively unchanged, without any significant differences before and after electrodialysis with each membrane. Also, ion contents were almost unchanged with the bipolar membranes and the electrolyte, $K_2SO_4$, as compared to rapid changes in sodium and potassium levels with the organic selective membranes and the electrolyte, $K_2SO_4$. In summary, the use of bipolar membranes provided juice with better sensory quality than that of the organic acid selective membranes.

• Journal of Aquaculture
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• v.10 no.2
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• pp.143-151
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• 1997

A six week feeding trial was conducted to determine the amount of fish meal analog (FMA) that can be replacing fish meal protein (FM) in Korean Rockfish. Seven experimental diets were formulated on isonitrogenous 52% crude protein and isocaloric basic 16.8KJ/g diet. Also, foreign commercial fish meal analog (CFMA) and attractants (ATT) were tested in this experiment. Percentage of the graded level of replacement of FM by FMA/CFMA on the basis of crude protein were as following : Diet 1, 100%FM ; Diet by 2, 60%FM : 40% CFMA ; Diet 3, 60%FM : 40$ CFMA+ATT ; Diet 4, 80%FM : 20%FMA ; Diet 5, 80%FM : 20% FMA+ATT ; Diet 6, 60%FM : 40%FMA+ATT ; Diet 7, 40%FM : 60% FMA+ATT. The FMA was made by mixing six animal protein source such as th blood meal, squid liver powder, meat and bond meal, leather meal, feather meal, poultry by-product and 3 essential amino acids (Met, Lys, Ile). Weight gain, feed efficiency, specific growth rate and protein efficiency ratio of fish fed diets 4, 5 and 6 were not significantly different (P>0.05) from those of fish fed the control (100% FM), while those of fish fed diets 2 and 3 were significantly lower (P<0.05) than those of fish fed the diet 6. There was no significant ATT effects in this study (P>0.05). Significant differences were found in hepatosomatic index, hemoglobin and condition factor. Therefore, these, results indicated that FMA can be used up to 40% as a substitute of fish meal protein in Korean Rockfish diets.

• Journal of Aquaculture
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• v.11 no.4
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• pp.487-493
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• 1998

This study was conducted to investgate the effect of fish meal analogue (FMA) on the growth of Israeli carp, Cyprinus carpio averageing 43g. Leather meal, meat and bone meal, feather meal, squid liver powder, poultry by-product and blood meal were used for ingredient of FMA. Four experimantal diets were formulated to contain 36% crude protein and 15.4 kJ available enery g-1. The percentage of follows ; Diet 1, 100% 3, 60% WFM + 40% FMA (40% FMA) ; Diet 4, 40% WFM + 60% FMA (60% FMA). In this expriment, fingerling Israeli carp averaging 43 g were assigned to each diet treatment. When the experiment was terminated, weigth gain (WG), feed conversion (FC), specific growth rate (SGR) and protein efficiency ratio (PER) were measured respectively. In the experiment, WG, FC, SGR and PER of Diet 2 were not significantly different from those of the control diet (P0.05). And WG, FC and SGR of Diet 3 were not significantly of the control Diet. In Diet 4, WG, FC and PER were not significantly different from those of the control Diet, but SGR was lower than that fo the control Diet. According to the results from this study, it might be possible to replace fish meal protein by FMA up to 60% in fingerling Israeli carp diets.

• Journal of Aquaculture
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• v.11 no.4
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• pp.421-428
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• 1998

This study was performed to determine the level of soybean meal (SM) or feather meal (FM) that could substitute for fish meal in fat cod(Hexagrammos otakii Jordan et Starks) diet. A control diet with fish meal as protein source was included. The amount of 5, 10, 15 and 20% of SM or FM substituted for fish meal in the control diet, respectively. Amino acids supplementation in the 20% SM diet was compared. In addition, combination of 5% SM, 5% corn gluten meal, 5% meat meal, 5% blood meal and 5% FM was substituted for fish meal in the control diet. Duplicate groups of the 40 fish averaging 21g were fed one of 11 isoproteic (45%) and isolipidic (15%) experimental diets to satiation twice a day for 2 months. No significant differences were found among fish fed the control, substituting up to 20% SM or 10% FM in weight gain, feed efficiency, daily feed intake, and protein efficiency ratio (P>0.05). It is concluded that SM or FM can be used as a partial substitute for fish meal up to 20% or 10% in the control diet, respectively.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.32 no.2
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• pp.149-154
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• 1999

A 16-week feeding trial was conducted to determine the amount of fish meal analogue (FMA) that can be replacing white fish meal (WFM) protein in Korean rockfish. Five experimental diets were formulated on isonitrogenous and isocaloric basis of $50\%$ crude protein and 15.6 KJ/g diet. The graded level of replacement of PM by Em on the basis of crude protein were as follows : Diet 1($100\%$ WFM), Diet 2($87.5\%$ WFM : $12.5\%$ FMA), Diet 3 ($75\%$ WFM : $25\%$ FMA), Diet 4($75\%$ WFM : $25\%$ FMA+2 EAAs), Diet 5 ($50\%$ WFM : $50\%$ FMA+2 EAAs). Methionine and Iysine were selected for 2 essential amino acids (EAA) to study the effect of adding EAA to the diets 4 and 5. Weight gain (WG), feed fed efficiency (FE) and protein efficiency ratio (PER) of fish fed diet 3, 4 and 5 were significantly lower (P< 0.05) than those of fish fed the control ($100\%$ WFM),while that of fish fed diet 2 was not significantly different diet(P>0.05) from those of fish fed the control diet. WG, FE and PER of fish fed diet 4 were significantly higher (P<0.05) than those of fish fed diet 3, but lower than those of fish fed the control diet. Therefore, these results indicated that FMA protein could substitute WFM protein up to $12.5\%$ without 2 EAAs supplementation in Korean rockfish. And, dietary supplementation of 2 EAAs could be benetficial when FMA is utilized as a fish meal replacer in juvenile Korean rockfish.

• Journal of Aquaculture
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• v.10 no.1
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• pp.87-95
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• 1997

This experiment was conducted for compare domestic experimental microparticulated diets with imported commercial microparticulated diets in olive flounder larvae, Paralichthys olivaceus (Temminck et Schlegel). Fish larve were fed four microparticulated diets from 8th day after hatching. Four diets were two commercial microparticulated diets D and H, and experimental microparticulated diets K1 and K2 formulated each with different protein sources (diet K1 ; squid meal, blood meal, yeast extract, chlorella powder, olive flounder muscle, Lys, and Met ; diet K2 ; whole egg protein, krill meal, short-necked clam meal, squid muscle, live yeast, yeast extract, and casein). There were no significant differences on body weight, body length and survival rates among four diet treatments up to the 40th day after hatching. At the 83th day after hatching, fish fed diet D had a significantly higher survival rate than that of fish fed diet K2, whereas there was no significant difference between to diet H and K1. Fish fed diet D had a significantly higher body weight than these of fish fed diaet K1 and K2, whereas there was no significant difference between fish fed diet D and H. There was no significant difference on EPA and DHA of body fatty acid composition among four diet treatments up to the 83th day after hatching. These results show that nutritionally well-ballanced domestic microparticulated diets for olive flouner lavae can be developed.

• Journal of radiological science and technology
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• v.37 no.4
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• pp.287-294
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• 2014

Gallstone is the most common disease of the biliary system. Korean has experienced an increase in the percentage of cholesterol gallstones. The major risk factors associated with cholesterol gallstones are age, gender as well as obesity. This study was designed to determine the prevalence of gallstones in the last three years and evaluate the associated risk factors in the population who underwent health screening. The study population consisted of 2,484 males and 2,212 females who visited the health promotion center in Dalseogu, Daegu in Korea from January 2011 to December 2013. Each participant in the study had their biliary system gallbladder examined using ultrasonography. Classified as underweight, normal weight or overweight using the population of obese according to the body mass index, and classified according to mood diagnosis of diabetes presented by the American Diabetes Association. Fasting blood glucose and number of liver function, the divided the control group by referring to the normal liver function values used herein. The geological map, I was classified as NCEP APT III. A showed of total 148 people were found to have gallstones. The prevalence of sex among 148 patients (3.15%) 84 men (1.79%) and 64 women 1.36%) which shows significantly there is little difference. 1.84% 40 years and below, 3.38% 40's showed age prevalence was 4.66% in 50's and above. In addition, Total-cholesterol was at the most in 52 people, LDL-cholesterol in 398 people, Triglyceride in 36 people, HDL-cholesterol in 19 people. The abnormal group, was created from the total-cholesterol categories from a physical examination of a subject that has been found to be gallstones in the gallbladder. A result of conducting the univariate analysis shows the prevalence of gallstones, a correlation that is meaningful. The logistic regression analysis of multiple ages was chosen to show risk factors age independent cholelithiasis. In spite of the conclusion, gallstones are not displayed in relation to the metabolic syndrome but in order to clarify this, not only the subject of a health examination is needed but, a further study of the general public when possible.