• 한국패류학회지
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• 제32권2호
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• pp.103-109
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• 2016

본 연구는 3년산 북방전복의 해상가두리의 먹이공급비율에 따른 성장 및 생존율을 조사하여, 미역과 다시마등의 천연먹이의 적정 공급율을 제안하여 북방전복 성패의 생산성 향상을 유도하고자 실시하였다. 먹이공급율은 실험전복 어체중량을 기준으로 일간공급율 (daily feeding rate, DFR) 5, 10, 15, 20% (5 DFR, 10 DFR, 15 DFR, 20 DFR) 를 설정하여, 해상가두리에서 2반복으로 13개월간 실시하였다. 해상가두리에서 사육한 전복 (최초 수용 시 평균각장 $73.77{\pm}11.27mm$) 성장에서 각장과 각폭의 성장율 (growth rate, GR), 일간성장율 (daily growth rate, DGR) 및 특수생장율 (specific growth rate, SGR) 과 체중의 증중률 (weight gain, WG), 일간증중률 (daily weight gain, DWG) 및 특수증중률 (specific weight gain, SWG), 그리고 생존율에서 5 DFR이 유의적으로 높았다 (P < 0.05). 생존율은 모든 실험구가 유의적 차이가 없었으며, 30%이하로 나타났다. 따라서 3년산 북방전복을 해상가두리에서 사육 시 미역, 다시마 등의 생먹이의 일간 공급율은 어체중량의 5-10%에서 공급되는 것이 성장에 유리하지만, 생존율을 향상 시킬 수 있는 다각적 검토가 필요하다.

• 한국패류학회지
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• 제30권3호
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• pp.227-234
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• 2014

본 연구는 해상가두리의 먹이공급비율에 따른 성장 및 생존율을 조사하고, 실내육상양식의 먹이 공급율과의 비교를 통해 국내 주요 북방전복 양성방법인 해상가두리와 함께 실내 사육 수조의 적정 천연먹이의 공급율을 제안하여 북방전복 생산성 향상을 유도하고자 실시하였다. 먹이공급율은 전복 어체중량을 기준으로 일간공급율 (daily feeding rate, DFR) 5, 10, 15, 20% (5DFR, 10DFR, 15DFR, 20DFR) 를 설정하여, 해상가두리와 실내육상수조에서 2반복으로 13개월간 실시하였다. 해상가두리에서 사육한 전복 (최초 수용 시 평균각장 $54.18{\pm}7.39mm$) 성장에서 각 장과 각폭의 절대성장율 (absolute growth rate, ARG), 일간 성장율 (daily growth rate, DGR) 및 특수생장율 (specific growth rate, SGR) 과 중량의 증중률 (weight gain, WG), 일간증중률 (daily weight gain, DWG) 및 특수증중률(specific weight gain, SWG), 그리고 생존율에서 20DFR이 유의적으로 낮았다 (P < 0.05). 실내육상수조에서 사육한 전복 (최초 수용 시 평균각장 $49.70{\pm}2.28mm$) 의 각장, 각폭의 ARG, DGR, SGR과 중량의 WG, DWG, SWG에서는 5DFR, 10DFR이 유의적으로 높았고 (P < 0.05), 생존율은 20DFR이 유의적으로 낮았다 (P < 0.05). 따라서 해상가두리와 실내육상수조 전복양식 자연먹이의 일간 공급율은 성장과 생존율, 그리고 경제적 측면까지 고려하면 어체중량의 5-10%에서 공급해야 한다.

• 한국수산과학회지
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• 제45권5호
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• pp.523-526
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• 2012

This study evaluated the effects of the number of feeding days and feeding rate on the growth of growing-out flounder Paralichthys olivaceus. Three replicated groups of fish ($141{\pm}1.9g$) were hand-fed a commercial feed under different feeding regimes for 9 weeks. Fish in group 6F-1S were fed to satiation twice daily for 6 consecutive days and starved for 1 day. Fish in groups 4F-1S and 3F-1S 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-1S twice daily for 6 consecutive days and starved for 1 day. The weight gain, feed efficiency and daily feed intake of the fish groups in 4F-1S and 3F-1S were not significantly different from those of group 6F-1S. The weight gain and feed efficiency of fish in group 6F-90% were not significantly different from those of group 6F-1S. 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 1 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.

• Asian-Australasian Journal of Animal Sciences
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• 제18권8호
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• pp.1075-1079
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• 2005

The main objective of this study is to examine genetic changes in growth rate and carcass composition traits in group housed, ad libitum fed pigs, from lines of Large White divergently selected over four years for high and low post-weaning daily gain on a fixed but restricted ration. Genetic parameters for production and carcass traits were also estimated by using average information-restricted maximum likelihood applied to a multivariate individual animal model. All analyses were carried out on 1,728 records of group housed ad libitum fed pigs, and include a full pedigree of 5,324 animals. Estimates of heritability (standard errors in parentheses) were 0.11 (0.04) for lifetime daily liveweight gain (LDG), 0.13 (0.04) for daily carcass weight gain (CDG) and 0.28 (0.06) for carcass backfat (CFT). Genetic correlations between LDG and CDG were highly positive and between LDG and CFT negative, suggesting that selection for lifetime daily gain under commercial conditions of group housing with ad libitum feeding would result in favourable improvement in carcass traits. CFT showed negative genetic correlations with CDG. Correlated genetic responses evaluated as estimated breeding values (EBVs) were obtained from a multivariate animal model-best linear unbiased prediction analysis. After four years of divergent selection for 6 week post-weaning growth rate on restricted feeding, pigs performance tested on ad libitum feeding in groups exhibited changes in EBVs of 6.77 and -9.93 (g/d) for LDG, 4.25 and -7.08 (g/d) for CDG, and -1.42 and 1.55 (mm) for CFT, in the high and low lines, respectively. It is concluded that selection for growth rate on restricted feeding would significantly improve genetic performance and carcass composition of their descendants when group housed and ad libitum fed as is a common commercial practice.

• 대한간호학회지
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• 제48권5호
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• pp.545-553
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• 2018

Purpose: The increasing survival rate of colorectal cancer demands various nursing interventions and continuous care for patients to adapt to their psychosocial daily lives. The purpose of this study was to identify factors associated with psychosocial adjustment in colorectal cancer survivors. Methods: A cross-sectional descriptive study with face-to-face interviews was conducted of 156 colorectal cancer survivors after surgery visiting an outpatient cancer clinic at a tertiary hospital in S city, Korea. Posttraumatic growth, health-promoting behavior, length of treatment, difficulty in activities of daily living, and having a stoma were entered into the linear regression model. Results: The strongest factor influencing the level of psychosocial adjustment was health-promoting behavior (${\beta}=.33$, p<.001), followed by difficulty in activities of daily living (${\beta}=-.24$, p=.001), posttraumatic growth (${\beta}=.20$, p=.004), and having a stoma (${\beta}=-.19$, p=.004). Conclusion: Nursing interventions for psychosocial adjustment in colorectal cancer survivors need to include the contents for posttraumatic growth, as well as health-promoting behavior, and activities of daily living.

• 한국양식학회지
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• 제11권3호
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• pp.363-369
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• 1998

본 연구에서는 북해도의 연어(Oncorhynchus keta) 치어에 있어서 1일 4회, 1일 2회, 1일 1회, 하루건너 4회 및 하루건너 2회의 각기 다른 사료 공급 조건에 의한 성장을 비교 분석하였다. 또한, 주 1회 및 2회의 사료공급 중지에 따른 영향을 조사하였다. 치어의 성장은 배일 2회 및 4회의 사료공급군이 다른 실험군에 비해 성장률, 비만도, 사료전환효율을 및 생존율에서 좋은 성장 결과를 나타내었다. 그리고 주 5회 사료공급한 실험군보다 매일 공급 및 주 6회 사료공급한 실험군이 좋은 성장을 나타내었다. 어류의 간세포 핵의 크기는 매일 공급한 실험군이 큰 수치를 나타내어 체내물질대사가 좋은 것으로 나타났다. 이러한 결과로 보아, 연어 치어의 사육에 있어서는 주 6일이상, 1일 2회이상의 사료공급이 적합한 것으로 판단된다.

• 한국동물학회지
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• 제9권2호
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• pp.12-20
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• 1966

Studies on the rate of growth, the rate of feeding and the efficiency of food conversion on the stage of new-born fries to the near adult size for three species of cuttlefishes , Sepia esculenta, Sepia subaculeata, Sepiella maindroni and two species of squids, Sepioteuthis lessomiana, Euprymna berryi were carried out in the process of artificial raising, and then argued about a feasibility of the propagation of cuttlefishes and squids. 1. The relation between the daily age (D) and the body weight(W) of Sepia exculent is expressed in a logarithmic equation, log W=3.0649 log D-4.2768. The daily rates of growth through 121 days of the raising period were 1.46 per cent for the man시 length and 1.67 percent for the body weight. The raipidest growth of Sepia esculenta is observed at the stage of 1 to 4 cm in the mantle length . At that time the daily rates of growth reach 3.3 to 5.5 percent for the mantle length and 10.4 to 12.0 percent for the body weight, respectively. The growth of Sepia esculenta varies a great deal to the bait. When fed on a dead bait the rates of growth decrease 17 per cent for the mantle length and 26 percent for the body weight compared with those fed on a live bait. 2. The relation between the daily age and the body weight of Sepia subaculeata is expressed in a logarithmic equation, log W=3.7447 log D-4.9003. The daily rates of growth through 110 days of the raising period were 1.63 percent for the mantle length and 1.83 percent for the body weight. The rapidest growth of Selia subaculeata is observed at the stage of 1.5 to 9.0 cm in the mantle length. At that time the daily rates of growth reach 3.1 to 7.4 percent for the mantle length and 6.8 to 16.7 percent for the body weight , respectively. 3. The relation between tehdaily age and the body weight of Sepiella maindroni is expressed in a ogarithmic equation , log W=2.9332 log D-3.8224 . The daily rates of growth through 133 days of the rearing period were 1.39 percent for the mantle length and 1.51 percent for the body weight . The rapidest growth of Sepiella maindroni is observed at the stage of 0.4 to 5.8 cm in the mantle length. At that time the daily rates for growth reach 4.6 to 7.3 percent for the mantle length and 8.5 to 15.4 percent for the body weight , respectively. 4. The daily rates of growth onthe stage of 0.5 to 6.0 comin the mantle length of Sepioteuthis lessoniana were 4.1 to 5.9 percent for the mantle length and 7.1 to 10.7 percent for the body weight . 5. During the rearing period of 31 days immediately after the hatching , the daily rateof feeding of Sepia esculenta marked 11.0 to 39.4 percent (28.2 percent in an average), and the efficiency of food conversion of this species reached 9.0 to 71.0percent (38.7percent in an average). Even at the more growing stage of 4.5to 6.2 cm in the mantle length, the daily rate of feeding of three species of cuttlefishes wee maintained 17.7 percent for Sepia esculenta, 30.8 percent for Sepia subaculeata and 34.7percent for Sepiella maindroni on an average. 6. The efficiency of food coversion of cuttlefishes and squids are larger than those of other fishes, and all the species are rapid in their growth. Four to five months are thought to be enough for their growing into a fair commercial size.

• 한국작물학회지
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• 제48권5호
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• pp.397-401
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• 2003

This experiment was conducted to know the characteristics of kernel growth as affected by various temperature regimes during grain filling using the varieties Hwaseongbyeo, Ilpumbyeo and Chucheongbyeo. The rice plants tested were grown in the natural condition at 1/5000a Wagner pots until flowering. After flowering, the rice plants were moved to controlled temperature conditions in a phytotron. The minimum/maximum daily temperature in the phytotron was controlled by 12/18, 15/21, 18/24, 21/27, and 24/$30^{\circ}C$, respectively. The grain weights were measured every three days after treatment. The mean daily kernel growth rate during active grain filling period showed different responses among varieties under various temperature regimes. The kernel growth rate of Chucheongbyeo was seriously reduced as temperature regimes were decreased. However, that of Ilpumbyeo was not influenced so critically. Ilpumbyeo showed some advantages in grain filling under low temperature regimes compared to Chucheongbyeo. The lag phase in grain filling of Chucheongbyeo was the longest among tested varieties, followed by Hwaseongbyeo under daily mean temperature regime of $15^{\circ}C$. Kernel weight of Ilpumbyeo increased fast in early grain filling phase under low temperature. This characteristic may be favorable for grain filling in temperate zone where the daily mean temperature is drastically dropped during grain filling period. Regression analysis with kernel growth rate and temperature showed the estimated critical low temperature for grain filling among varieties were $9^{\circ}C$, $12^{\circ}C$, $13^{\circ}C$ in Ilpumbyeo, Hwaseongbyeo and Chucheongbyeo, respectively. Under moderate temperature the duration of grain filling of Ilpumbyeo was longer than that of Chucheongbyeo. However, Under low temperature that of Ilpumbyeo was more favorable than Chucheongbyeo.

• 한국수산과학회지
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• 제3권3호
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• pp.161-171
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• 1970

보리새우(Penaeus japonicus Bate)의 섭이량, 주간, 야간 섭이율과 일간 섭이율, 이료의 종류에 따른 섭이률의 차이, 보리새우의 성장과 이료의 전환효율등에 관해서 시험한 결과를 요약하면 다음과 같다. 1. 보리새우의 섭이율은 수온범위 $19\~30^{\circ}C$, 체중범위 $1.6\~14.9g$에서 수온이 높을수록, 또 새우의 크기가 작을수록 커지며, 평균 일간 섭이율은 $18\~44\%$에 달한다. 2. 항상 야간 섭이율이 주간 섭이율보다 크나, 무저질, 암상태 또는 직접광선을 피한 사육상태에서는 주간에도 일간 섭이률의 $22\~37\%$의 섭이를 이룩할 수가 있어, 그만큼 보리새우의 성장을 촉진시킬 수가 있었다. 3. 멸치와 바지락의 두가지 이료에서는 주야의 구별없이 멸치를 한층 더 많이 섭취하였으며, 일간 섭이율중에서 멸치 및 바지락육의 섭이율은 각각 $12.9\%$, $10.3\%$이었다. 4. 보리새우의 체중(W;g)과 일간 성장률 ($DGR;\%$) 사이에는 log DGR=0.7035-0.7864 logW의 관계식이 성립되고, 새우의 크기에 비예하여 일간 성장율은 작아진다. 5. 보리새우의 이료의 전환효율은 새우의 크기에 따라 큰 차이가 없이 평균 $2.8\~7.8\%$의 범위로 변동하며, 지금까지 알려진 어류 (문치가재미, 고등어, 방어 등)와 참오징어의 그것에 비교하면 매우 작은 값을 취한다.

• 대한수의학회지
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• 제10권1호
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• pp.1-4
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• 1970

Experiments were carried out in order to study the relationship of thyroid activity to growth potentiality in chicken. Further work was also performed to determine thyroid secretion rate and body gain of the different sexes. A correlation coefficient of 0.241 in the male and 0.237 in the female were obtained between daily gains and daily thyroid $^{131}I$ out put rate in the chicken. The correlation was not statistically significant, but the chicken with a lower thyroid activity tended to gain faster than those with a higher thyroid activity. The average daily gain of the female(12.13 gram) was significantly higher than the male (9.28 gram). The average daily thyroid secretion rate of male tended to have a higher rate, but it was not statistically significant.