• 한국양식학회지
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• 제19권3호
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• pp.183-187
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• 2006

넙치, Paralichthys olivaceus (Temminck et Schlegel)에서 급이와 절식이 생존과 성장 및 표현형질에 미치는 영향을 파악하기 위해 12주에 걸친 급이와 절식 실험을 수행하였다. 실험 기간중 절식군의 생존율은 급이군에 비해 낮았다. 기아는 비만도, 일일성장률, 체중 성장률 및 실험 종료시 체중에서의 감소를 보이는 성장 저해를 나타낸 반면, 급이군은 지속적이고 양호한 성장을 보였다. 절식군은 급이군에 비하여 유사한 dressing비와 내장괴지수를 보였으며, 낮은 내장괴제거 체중을 보였다(P<0.05). 본 연구 결과, 급이와 절식 파악에 사용된 표현형질은 본 종의 영양 상태 확인의 지표로 유용하며, 넙치 표본시의 성장 시기 평가 결정에 유용하리라 사료된다.

• Ecology and Resilient Infrastructure
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• 제5권4호
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• pp.264-275
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• 2018

The experiment was conducted to investigate the effects of various dietary conditions on external morphometric traits, and sectioned morphometric traits in the cultured cyprinid loach, (Misgurnus anguillicaudatus) for 28 days. For the fed group there was an increase in body weight, standard length, and morphometric dimensions of the head and body cavity regions compared with the starved and initial groups. Sectioned morphometric trait analysis revealed that relative to the starved group, the fed group had greater body circumference, cross-sectional area, and total height (P<0.05). Our results provide data on external and sectioned morphometric changes under starvation conditions, and can be used as a guide to assist in the regulation and scheduling of feeding, and as indices of the nutritional status of cyprinid loach.

• 한국환경과학회지
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• 제27권6호
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• pp.383-399
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• 2018

In the present study, the community distribution, functional feeding groups, and habitat groups of the benthic macroinvertebrates from Gayasan National Park were investigated at eight different sites from 2015 to 2016. The correlation between habitat altitude and each group type was analyzed statistically. Biodiversity indices, including dominance, diversity, richness, and evenness indices, were calculated. The results showed a total of 4,216 individual benthic macroinvertebrates were collected, including 4 phyla, 6 classes, 16 orders, 40 families, and 100 species. Gammarus sobaegensis was dominant with 0.141% dominance, and the subdominant species was Epeorus nipponicus with 0.088% dominance. The EPT group(Ephemeroptera, Plecoptera and Tricoptera) accounted for 71.00% of the total species and 67.69% of the total individuals. The number of scraper species was highest, and the number of gathering collector individuals was highest among functional feeding groups. The individual number of scrapers(r=-0.358, p < 0.05) and gathering collectors(r=-0.343, p < 0.05) decreased with increasing altitude. The numbers of species and individuals of clingers and sprawlers were highest among the habitat groups. The individual number of clingers(r=-0.547, p < 0.01) and burrowers(r=-0.331, p < 0.05) significantly decreased with increasing altitude. The diversity and richness indices were higher in St. 3 than in the other sites. The dominance index was highest in St. 2, and the evenness index was highest in St. 7. We evaluated the biological water quality with several known methods, and concluded that ESB(Ecological score of benthic macrovertebrates community) and GPI(Group polution index) were more suitable than KSI(Korean saprobic index) and BMI (Benthic macrovertebrate index) to assess the biological water quality of Gayasan mountain stream water.

• 한국잠사곤충학회지
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• 제37권1호
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• pp.27-32
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• 1995

광식성계통 Fb잠은 1991년 춘잠기부터 양배추에 대한 섭식성을 기준으로 선발되었다. 선발 7세대째에 상엽분말을 전혀 함유하지 않은 합성사료에 의해 인공사료육을 실시하였으며 그 결과 양배추에 대한 섭식율은 급격히 증가하였다. 1994년 추기까지 14세대 동안 선발을 계속한 결과 95%이상의 양배추 섭식율을 나타냈다. 이 계통은 일반 인공사료뿐 만 아니라 수종의 채소류와 과일류에 대해서도 높은 섭식률을 나타냈으며, 견형질면에 있어서도 상당히 우수하였다.

• Asian-Australasian Journal of Animal Sciences
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• 제8권4호
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• pp.375-378
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• 1995

Three month old 600 ducklings of Khaki Campbell/KC Desi and KC X Desi were reared for a period of 13 months in the villages surrounding Bangladesh Agricultural University in order to study the economic traits of duck with and without extra feed to scavenging system of rearing. KC attained earlier sexual maturity followed by KC X Desi and Desi ducks and crossbred showed closeness to sire breed for this trait, KC X Desi found heavier and produce more eggs than their parental breeds. KC showed higher hatchability followed by KC X Desi and Desi ducks were more resistant followed by KC X Desi and KC to diseases. Extra feeding were found more beneficial to ducks irrespective of breed and types.

• Animal Bioscience
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• 제34권2호
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• pp.233-242
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• 2021

Objective: The aim of this study was to determine the effect of pineapple cannery by-product (PCB) level on the growth performance and carcass characteristics of finishing Hanwoo steers. Methods: The feeding stage was divided into early and late finishing stages. A total of 60 castrated Hanwoo steers (13.9±0.8 months old, 418.8±36.5 kg initial body weight [BW]) were blocked by initial BW and then randomly allotted into 12 pens (five head/pen). The pens were randomly assigned to control (CONT), low PCB (LPCB), or high PCB (HPCB) treatments. These diets contained 0%, 1.5%, or 3.0% of PCB (on a dry matter [DM] basis; as-fed basis was 0%, 10.6%, or 21.2%), respectively. Results: For the early finishing stage, body weight gain (BWG) and average daily gain (ADG) of the CONT and LPCB feeding groups were greater (p<0.05) than those of the HPCB feeding group. In addition, there were linear and quadratic effects on BWG and ADG with increasing dietary PCB level (p<0.05). The gain to feed (G:F) ratio tends to quadratically decrease with an increasing PCB level in the early finishing stage (p = 0.076). Growth performances of late finishing stage were not affected by PCB level. The marbling score of the LPCB feeding group was similar to that of the CONT feeding group. However, there was a linear decrease (p< 0.05) in marbling score and quality grade among treatments as PCB was increased in the diet. In the longissimus muscle free amino acid profile, histidine composition increased linearly (p<0.05) with an increasing level of PCB. Conclusion: The level of PCB 1.5% DM in diet can be used for finishing steers without any adverse effects on growth and carcass performances. However, there were some negative effects on growth and carcass performance in the HPCB feeding group.

• Asian-Australasian Journal of Animal Sciences
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• 제29권10호
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• pp.1500-1507
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• 2016

Myostatin (MSTN) can negatively regulate the growth and development of skeletal muscle, and natural mutations can cause "double-muscling" trait in animals. In order to block the inhibiting effect of MSTN on muscle growth, we transferred zinc-finger nucleases (ZFN) which targeted sheep MSTN gene into cultured fibroblasts. Gene targeted colonies were isolated from transfected fibroblasts by serial dilution culture and screened by sequencing. Two colonies were identified with mono-allele mutation and one colony with bi-allelic deletion. Further, we introduced the MSTN-ZFN mRNA into sheep embryos by microinjection. Thirteen of thirty-seven parthenogenetic embryos were targeted by ZFN, with the efficiency of 35%. Our work established the technical foundation for generation of MSTN gene editing sheep by somatic cloning and microinjection ZFN into embryos.

• Asian-Australasian Journal of Animal Sciences
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• 제15권6호
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• pp.838-843
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• 2002

The objectives of this study were to examine growth performance and meat quality by three different feeding patterns in Korean native cattle (KNC). In each of 3 years, fifteen KNC were randomly assigned in a (3 feeding management)${\times}$(3 sex) factorial design experiment; thus, in total, there were 5 animals in each of the 9 treatments. The three feeding management treatments were longterm (24 month) restriction feeding (LTFR), long-term restriction feeding-hormone implant (LTFR-tH), and short-term (18 month) nonrestriction feeding (STFNR). Three sexes were bull, steer, and heifer. Concentrate diet was fed restriction-feeding method based on body weight in LTFR and LTFR-tH. However, the diet was fed ad libitum in STFNR. Hormonal implantation was made three times with M-$PO^{TM}$ for bulls and with F-$TO^{TM}$ for heifers at 18, 20, 22 month of age in LTFR-tH. Animal were purchased from the local cattle market and managed in two local farms and at the university research unit. Animals were slaughtered at 24 months for long-term trial and at 18 month for short-term trial. The growth rate was the highest in bulls and the lowest in heifers. However, the differences were diminished in F-$TO^{TM}$ implanted heifers. The average daily gain was high in STFNR due to ad libitum feeding. The carcass grade was similar among the treatments on percentage bases. Hormonal implants improved significantly the meat quality grade in all sexes. Castration increased body fat content and improved meat quality grade by intramuscular fat deposition. In conclusion, long-term feeding and hormone treatment increased meat quality grade more than short-term feeding. However, ADG was higher in the short-term trial although feedefficiency was lower.

• 여성건강간호학회지
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• 제12권2호
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• pp.97-105
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• 2006

Purpose: The purpose of this study is to verify the effects of the Qigong training program on the anxiety and labor pains of primipara. Method: The research subjects were a total of 60 primipara who consulted a doctor regularly concerning their antenatal care. Among them, 30 people were the experimental group, and the other 30 people were the control group, and were selected as homogeneous with the experimental group. The degree of anxiety and labor pains were measured by State-Trait Anxiety Inventory(STAI) and Graphic Rating Scale(GRS). SPSS WIN 11.0 was used for data analysis. Obstetric and general characteristics between experimental and control groups, and a homogeneity test of state and trait anxiety were done by both $X^2$ test and t-test. The hypothesis testing was analyzed by ANCOVA with a covariate of pretest value. Result: The first hypothesis, 'Primipara who join the Qigong training program have lower anxiety than those who do not join' was supported (F=28.8, p<.000). The second hypothesis, 'Primipara who join the Qigong training program have lower labor pain than those who do not join' was unsupported. Conclusion: It was verified that the Qigong training program was effective in alleviating anxiety; however it did not have any effect on relieving labor pain, so more in-depth research is needed later on.

• 농업과학연구
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• 제48권4호
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• pp.719-727
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• 2021

This study was conducted to evaluate the effects of mixed and separate gender feeding on the growth performance and carcass traits of Korean native chickens (KNC) compared to white semi-broilers (WSB) and a commercial broiler (CB) from hatching to 35 days. Here, 240 chicks were used with eight birds per cage in a randomized design with six replicates per breed. For the KNC lines, three groups of males (KNC-M), mixed-gender birds (KNC-FM) and females (KNC-F) were used. The two-phase feeding program used here consisted of a starter phase (days 1 - 21: crude protein [CP] 20% and metabolizable energy [ME], 3,050 kcal·kg^-1) and a grower phase (days 22 - 35: CP 18%, 3,100 kcal·kg^-1) for a commercial broiler. The WSB and CB were fed the only starter commercial diet. Fresh water and feed were provided ad-libitum. The results revealed that the KNC group had a lower (p < 0.05) body weight (BW) from day 7 and day 35 compared to that of the CB. Furthermore, the KNC group showed a lower (p > 0.05) average daily gain (ADG) relative to that of the CB during the entire experimental period. No difference (p > 0.05) was observed in the shank length among the treatments. There were also no significant differences in the growth performance or carcass traits between the KNC-M and WSB groups or in the genders of the KNC group.