• Journal of The Korean Society of Grassland and Forage Science
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• v.25 no.3
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• pp.185-190
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• 2005

The objective of this experiment was to compare the dry matter intake, nutrients digestibility and nitrogen and energy utilization of herbages from mixtures types; conventional mixtures(orchardgrass 50+ tall fescue 20+perennial ryegrass 10+Kentucky bluegrass 10+white clover $10\%$), complex mixtures (orchardgrass 40+ tall fescue 20+perennial ryegrass 10+Kentucky bluegrass 10+redtop 10+alfalfa 5+red clover $5\%$) and simple mixtures(orchardgrass 80+red clover $20\%$) by Korean native goats. This experiment was conducted by total collection method in laboratory, 2000. The voluntary DM intake per body weight was slightly higher f3r complex mixtures (30.2g) than those of other mixtures. but there was no significant difference. The digestibility of dry matter and cellular constituents were slightly higher for complex mixtures than those of other mixtures (p<0.05), but NDF and ADF digestibilities did not differ among mixtures. The retained nitrogen percent (apparently biological value) was slightly higher fer complex mixtures $(55.1\%)$ than those of other mixtures, but there was no significant difference among mixtures. Apparently retained digestible energy was slightly higher for complex mixtures $(60.2\%)$ than those of other mixtures (p<0.05). Based on the results, the nitrogen and energy utilization of herbage by Korean native goats were slightly higher for complex mixtures than those of other mixtures.

• The Korean Journal of Zoology
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• v.20 no.3
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• pp.141-147
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• 1977

The distribution of renal veins of fifty Korean native goats(100 kidneys) was observed. The results obtained were as follows: 1. In all goats a single renal vein, both on the left and right sides, emerged from the hilus of the kidney and then entered the posterior vena cava. 2. The ventral and dorsal surfaces of the kidney were drained through several segmental veins. These segmental veins were grouped into 2-3 Rami to formed the main trunk of the renal vein. The segmental veins drained into Rami dorsalis and ventralis, in 56 percentage of the left and 64 percentage of the right kidney and the remainder goats drained into Rami cranialis and caudalis; Rami cranialis, medius and caudalis; Rami ventralis, medius and dorsalis. 3. The ventral and dorsal surfaces of the kidney were divided into 2-4 venous segments. Among them three segments were mostly frequent (55 percentage). 4. A common segment vein was drained both dorsal and ventral surfaces at the cranial, caudal pole, and both poles. The frequency of the common segment was 32 percentage at the cranial, 18 percentage at the caudal pole, and 14 percentage at the both poles. 5. A polar renal vein was not observed. 6. The renal veins and the renal arteries did not match in arrangement and in course.

• Journal of Animal Science and Technology
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• v.52 no.4
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• pp.297-304
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• 2010

This study was conducted to investigate the effects of dietary quercetin on feed utilization, blood parameters, and meat quality of Korean native goats. Totally sixteen Korean native goats, 15 kg of average BW aged at 7 months, were employed in the experiment with eight replicates per treatment. One group was fed quercetin at 200 mg/kg level and the other group was fed none as control for 15 days. Dietary inclusion of quercetin did not affect feed intake, water intake, and the amount of urine and feces. Digestibilities of crude fat, NDF, and ADF for 5 days were not affected, but digestibility of crude protein was increased by the dietary inclusion of qurecetin (P<0.05). Quercetin increased rumen total VFA, propionate, and butyrate significantly (P<0.05). Acetate/propionate ratio (A/P) in the quercetin treated group was significantly higher than control. 2,2-Azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) ($ABTS^+$) reducing activity of the loin from goat fed quercetin was higher than that of control. Sensory analysis conducted at 24 hr post mortem revealed that color, texture, and overall acceptability of the loin from goat fed quercetin were significantly preferred to that of control. Feeding quercetin did not influence pH, water holding capacity, 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity, TBARS value, and fatty acid composition of the loin significantly. In conclusion, the dietary inclusion of quercetin increased the digestibility of crude protein, rumen total VFA, propionate, butyrate, and A/P ratio. In addition the higher color and texture preference and ABTS+reducing activity of loin indicating some beneficial effect on enhancement of meat qualityin goats.

• Korean Journal of Agricultural Science
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• v.9 no.1
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• pp.284-302
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• 1982

Development of protein resources as food has been a big issue especially in Southeast Asia region, and intake of protein is also insufficient in Korea. To cope with this shortage of protein resources and its improvement together with increased production of high nutritive animal protein, studies were carried out on feeding of Korean native goats. In the experiments were made absorption of carbohydrate and volatile fatty acid in miniature rumen, and absorption of amino acid in rumen as in vivo were conducted as part of studies on nutritional absorption in rumen. Those nutritional for improvement of feeding and management as described above are summarized as following. 1. According to the result of test on the nutritional absorption of native goat by means of miniature rumen method, absorption ratio of VFA measured at 0.5, 1 and 2 hours after injection of nutrition showed propionic acid 70-86%, acetic acid 74-87%, and lactic acid 76-89%. In the absorption of organic substances, ethyl alcohol of 0.5% showed 29-87% and lactic acid of 0.1M showed 12-27% of absorption ratio. 2. Result of absorption measurement in rumen from L-type free amino acid injection in the content of rumen vein showed lower rate at menthionine-free group compared to whole-egg amino acid injection in the content of rumen vein showed lower rate at methioine-free group compared to whole-egg amino acid group, and high absorption ratio was observed at methionine 3 times group and urea added group. Deficiency of methionine caused no change of the content in mucous membranes. 3. Absorption of amino acid in rumen muscular layer showed equal tendency as in the mucous membrane without exerting any influence of methionine deficiency. At the methionine3-times group, content of methionine and glutamine were increased by 14.7 and 4.4 times as compared to whole-egg amino acid group, an absorption ratio of glutamine, proline and valine were increased at urea added group. 4. In general, concentration of amino acid in rumen vein plasma was lower than in rumen mucous membrane and muscular layer. Absorption ratio of amino acid is decreased due to methionine deficiency, and tripling of methionine or urea adding caused increment of amino acid. Absorption pattern is thus varied depending on the composition of amino acid. 5. At the urea added group, content of ammonia-N, amino-N and urea were increased in rumen muscular layer. As the inside of goat's rumen was unable to clean thoroughly, investigation was made on remaining bacteria, however, variation of ammonia-N was affected by these bacterial content. 6. Variation in rumen structure by differential absorption of amino acid was observed by general microscope and fluorescent microscope. According to the result of observation in the methionine 3 times group, single cylinder epithelium of mucous membrane showed rather thin, and it was thick at urea added group though no significant differences existed among test groups in submucous membrane and muscular layer.

• Journal of Embryo Transfer
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• v.19 no.1
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• pp.67-73
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• 2004

본 연구는 우리나라 고유의 유전자원인 재래산양의 체내수정란 생산기술을 확립하고자 수행하였다. 흡입법(aspiration)과 세절법(slicing)에 의해 난소 한 개당 회수된 난자의 수는 3.9개와 4.1개를 나타내어 slicing방법이 aspiration방법보다는 많은 숫자의 난자를 회수하였으나 유의적인 차이는 나타내지 않았다. 회수된 난자의 등급별 분포는 aspiration방법에서 Grade I, Grade II, Grade III, Grade IV의 비율이 10.3%, 20.5%, 38.5%, 30.8%를 나타내었으며, slicing법에서는 9.8%, 22.0%, 39.0%, 29.3%를 나타내어 Grade III과 Grade IV의 비율이 70% 이상을 차지하였다. 회수된 난자를 체외성숙 시킨 결과 Grade I과 Grade II에서는 85% 이상이 metaphase H (MII)까지 도달하였으나, Grade III과 Grade IV는 40% 이하의 체외성숙율을 나타내었다. 체외수정용 배양액으로 BO를 사용하였을 경우 Grade I 및 II에서 84.4%의 난분할율을 나타내어 TALP를 사용하였을 때의 58.8%보다 높은 난할율을 보였다. 또한 배양액의 종류별 체외발달율에 있어서는 상실배 및 배반포기배로의 발달은 mSOF를 배양액으로 이용하였을 경우 15.0%의 발달율을 나타내었으며, 체외배양 시 항산화물질인 glutathione (GSH)을 첨가함으로서 26.8%의 상실배 및 배반포배로의 발달율을 나타내었다.

• Korean Journal of Agricultural Science
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• v.11 no.1
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• pp.108-113
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• 1984

This survey was carried out for two years from June of 1982 to May of 1984 to investigate factors influencing the Korean native goat rearing. The results were summarized as follows. 1. The daily gain of female goats from weaning age to yearling was 41.9g in average. The maximum and minimum gains were 55.1 and 30.1g, respectively. 2. The mean body weights when purchased from the market were 8.07kg for survived goats and 5.89kg for dead goats. 3. The kidding months of does were distributed throughout all the seasons, and the average litter sizes were 1.2 kids for first kidding and 2.0 kids for second kidding. 4. The amount of DM intake was 2.78% of the body weight. The DM digestibility was 62.91 % for the first pregnant goats under good feeding condition. 5. The amount of DM intake was 3.92% of the body weight. The DM digestibility was 47.01% for the growing female goats under fair feeding condition. 6. The goats seemed to prefer shrub plants to grass. About 65% of the total dry forage consumed was tumbergiana (kudzu).

• Journal of The Korean Society of Grassland and Forage Science
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• v.28 no.2
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• pp.119-128
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• 2008

The object of this experiment was to investigate the food habits of Korean native goats fed with various roughage sources. The feeding trials were conducted at Chungnam National University and Unbong Animal Genetic Resources Station in 2007. The experimental roughages sources were five including 25 species in all; grass sources: 5 species (Lolium perenne, Festuca arundinacea, Poa pratensis, Agrostis alba and mixed grass, legume sources: 5 species (Trifolium pratense, Medicago sativa, Trifolium repens, Melilotus officinalis and Vicia villosa), browse sources: 5 species(Quercus serrata Thunb., Prunus jamasakura Sieb., Quercus aliena Blume, Robinia pseudoaccacia and Pinus densiflora), weed sources: 5 species(Artemisia princeps Pampanini, Erigeron canadensis, Alopecurus aegualis Sobolewski, Echinochloa crusgalli var. frumentacea (Roxb.) Wight and Rumex crispus), and native grass sources: 5 species(Zoysia japonica Steudel, Agropyron tsukushiense var. transiens(Hack) Ohwi., Arundinella hirta(Thunb.) Tanaka, Miscanthus sinensis Anderss and Phragmites comunis Trin). Ten Korean native goats were selected which had nearly the same body weight(average 30.6kg, 남) as experimental animals. Experimental roughages were prepared by 0.5kg per 1 species fed to Korean native goats, and the experiment was carried out from 08:00 to 20:00. The chemical composition and dry matter digestibility of each roughage source and species were significantly different at the sampling area, plant species, growth stages and cutting period (p<0.05). The Korean native goats ate more roughages which had low fibrous contents, but high dry matter digestibility. Among all the 25 species of roughages, the favorite intake species order by Korean native goats was observed like this: Quercus serrata Thunb., Quercus aliena Blume, Trifolium repens, and Pinus densiflora and Artemisia princeps Pampanini which was lower intake compared to other domestic herbivores. On the other hand, compared to each roughage source, total intake amount by Korean native goats was showed as browse(29.9%), legumes(23.0%), weeds(21.6%), grasses(21.5%) and native grasses(4.0%), respectively. Based on the result, the food habit of Korean native goats seems to be closer to browser type.

• Korean Journal of Agricultural Science
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• v.12 no.2
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• pp.260-271
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• 1985

A study was carried out to improve the feeding practice of Korean native goats. Ten goats were used in this study to obtain basic information needed for the determination of energy and nitrogen requirements for maintenance and growth. The results obtained were as follows. 1. The daily gain of male and female goats were $80{\pm}13.9g(\bar{x}{\pm}S.E.)$ and $41{\pm}8.9g$, respectively. 2. The amounts of orchardgrass hay and formula feed consumption by goats were 0.60-0.75% and 1.80-2.80% of their body weights, respectively, when fed ad libitum. The daily consumption of orchardgrass hay by goats when fed alone was 1.98-3.16% of their body weights. 3. The amounts of metaholizable energy needed for daily maintenance were 61.6, 65.0 and $72.3Kcal/BW_{kg}{^.75}$ at the live weights of 30, 21 and 12kg, respectively. 4. The daily nitrogen requirements for maintenance were 7.07, 4.67 and $3.04g/BW_{kg}{^.75}$ at the live weights of 30, 21 and kg, respectively. 5. Daily energy retention was 138 kcal/head and nitrogen retention rate was 13.3-22.5%.

• Korean Journal of Veterinary Research
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• v.40 no.3
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• pp.421-430
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• 2000

The regional distribution and relative frequency of the pancreatic polypeptide (PP)-immunoreactive cells in the pancreas of the Korean native goat (Capra hircus) were studied by immunohistochemical methods (PAP methods) using specific antisera against to PP during developmental stage, fetus, neonate, 1-month-old, 6-month-old and adult. The different regional distribution and relative frequency of PP-immunoreactive cells in the pancreas of Korean native goat were observed during development. In the exocrine portions, they were detected in the all ages and distributed in the interacinar regions. PP-immunoreactive cells were increased from neonate to 1-month-old but thereafter decreased with developmental stage. In the pancreatic duct, PP-immunoreactive cells were demonstrated from 1-month-old but they were decreased with developmental stages in these regions. These cells were observed in the subepithelial connective tissue of the pancreatic duct with a few frequencies in 1-and 6-month-old. However, they were located in the interepithelial cells of the pancreatic duct in the adult with rare frequency. In the endocrine portion (pancreatic islets), PP-immunoreactive cells were observed from neonate, and the regional distribution of PP-immunoreactive cells from 1-month-old was divided into two patterns : dispersed 1) in the marginal regions of the pancreatic islets with moderate or a few frequencies, and 2) in the whole pancreatic islets (in a case of 1-month-old) or in the central cores (in a case of 6-month-old and adult) with numerous frequency. In conclusion, the different regional distribution and relative frequency of PP-immunoreactive cells in the pancreas of the Korean native goat were observed during development. It is suggested that the changing of feeding habits and physiological conditions during different developmental stages may cause these differences.

• Journal of Animal Science and Technology
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• v.45 no.6
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• pp.1019-1030
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• 2003

The study was conducted to isolate and identify highly fibrolytic anaerobic fungi from the guts of a Hanwoo steer and a Korean native goat, and then investigate the characterization of cellulolytic activity of an anaerobic fungus. Twenty-one anaerobic fungal colonies were isolated in the study, in which 16 colonies were isolated from the rumen contents of the Hanwoo steer and 5 colonies from the duodenal fluids of the Korean native goat. Four anaerobic fungi were selected based on higher cellulolytic enzyme activities to identify under a optical microscope. NLRI-M003 and -T004 belong to Neocallimastix genus and NLRI-M014 belongs to Piromyces genus based on the morphology of their thallus, sporangia, rhizoid and the number of flagella. NLRI-M001 appeared to be an unknown strain of anaerobic fungi due to its different morphology from existing types of anaerobic fungi, though the morpholgoy is similar to Orpinomyces sp. Supplementation of 2% anaerobic fungal culture(NLRI-M003) in rumen-mixed microorganisms increased in vitro DM degradability of rice straw and filter paper up to 4 and 11%, respectively, compared with non-supplementation(control). CMCase and xylanase activities in in vitro culture were also higher in 2% fungal supplementation than controls in both rice straw and filter paper substrates.