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수중 비열 유전체장벽 방전 플라즈마를 이용한 양식어류의 병원성세균 3종 및 Tetracycline계 항생제 제거
조규석,박종호 한국수산과학회 2022 한국수산과학회지 Vol.55 No.6
The purpose of this study is to evaluate the effect of underwater non-thermal dielectric barrier discharge plasma (DBD plasma) on the sterilization of three types of pathogenic bacteria that cause diseases in freshwater fish and the reduction of a tetracycline antibiotics. This experiment was conducted in the DBD plasma generator, and the voltages used to generate plasma were 11.6 kV and 23.1 kV. The measurement intervals were 0, 1, 5, 10 and 15 min. As a result of DBD plasma treatment, Aeromonas hydrophila, Edwardsiella tarda and Pseudomonas fluorescens were removed 93–99% after 5 min at 23.1 kV, and the tetracycline antibiotics were reduced 70–95% after 15 min at 23.1 kV. In this study, as a result of treating the effluent with DBD plasma at a fish farm where the medicinal bath was conducted with oxytetracycline-HCl (OTC-HCl) products, OTC-HCl decreased by 62% after 10 min at 23.1 kV.
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연어(Oncorhynchus keta) 치어의 생존, 성장 및 생리학적 반응에 미치는 염분의 영향
조규석,장석우,이유진,강동양,강한승 (사)한국해양생명과학회 2022 한국해양생명과학회지 Vol.7 No.2
본 연구는 연어(Oncorhynchus keta) 치어의 성장, 생존 및 혈액 성상에 미치는 염분 농도의 영향을 파악하고자 실시되었다. 실험은 염분 농도 0, 10, 20 및 30‰에서 30일간 실시되었으며3반복으로 진행되었다. 4주 후 생존율은 0, 10 및 20‰ 실험구에서 87.5% 이상이었으나, 30‰ 실험구는 75%로 유의한 감소를 보였다. 증중율(Weight gain), 일간 성장률(specific growth rate), 사료효율(feed efficiency), 일간 사료섭식량(daily feed intake), 일간 단백질섭취율(daily protein intake), 단백질효율(protein efficiency ratio)은 10‰ 실험구에서 가장 높았다. 혈장성분 중 ALT (alanine aminotransferase)는 10, 20 및 30‰ 실험구가 0‰ 실험구에 비해서 유의한 감소를보였으나, Na+ (sodium)과 Cl- (chloride)는 유의한 증가를 보였다. 또한, 실험기간 중 TP (total protein)과 K+ (potassium)은 변동을 보이지 않았다. 결론적으로 연어 치어(11~33 g)의 성장과생존에 적합한 최적의 염분 농도는 10‰로 보이나, 혈액 성상의 영향은 향후 추가적인 연구가 필요한 것으로 판단된다.
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Bacillus subtilis을 활용한 바이오플락 시스템에서 사육한 대농갱이(Leiocassis ussuriensis)의 성장 및 사육수 수질 변화
조규석,박종호,강한승 (사)한국해양생명과학회 2022 한국해양생명과학회지 Vol.7 No.2
본 연구는 Bacillus subtilis를 활용한 바이오플락 양식 기술(Biofloc technology, BFT)을 이용하여대농갱이(Leiocassis ussuriensis) 양식의 가능성을 확인하기 위해 90일 동안 생존, 성장지수와사육수 수질의 변화를 관찰하였다. 대농갱이를 입식하기 전 BFT 수 제조를 위해 실험수조에사료와 당밀을 첨가한 후 B. subtilis를 접종하여 40일간 수질을 안정화시켰다. 실험결과, 대농갱이의 생존율은 대조구 92.7±3.2%와 BFT 실험구 95.8±3.3%로 조사되었다. 증체율은 대조구118.1±9.0%와 BFT 실험구 197.7±15.6%을 보였고, 일간 성장율은 대조구 0.87±0.5%, BFT 실험구 1.21±0.06%로 나타났다. 사료효율은 대조구가 43.7±2.6%이었고, BFT 실험구는 70.1±4.1%로측정되어 BFT 실험구의 사료효율이 더 높은 것으로 조사되었다. 실험기간 동안의 수질 변화를측정한 결과, pH는 대조구와 BFT 실험구 모두 감소되었고, MLSS는 대조구에서 변화를 보이지않았지만, BFT 실험구에서는 90일째부터 유의한 증가를 보였다. NH4+-N와 NO2--N는 대조구에서 실험 30일째부터 유의한 증가를 보였으나, BFT 실험구에서는 변화를 보이지 않았다. 결론적으로 B. subtilis를 활용한 BFT 시스템을 대농갱이 양성 과정에 적용한 결과, 수질은 안정화되는 경향을 보였고, 성장도와 사료효율은 대조구에 비해 높은 것으로 조사되어 긍정적인 효과가 있는 것으로 확인되었다.
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조규석,김계웅:김석은 공주대학교산업개발연구소 2000 産業開發硏究 Vol.8 No.-
This research was undertaken in order to obtain the technological skill and good information on the feeding and raising of ostrich in Korea. Ostrich meat have been confirmed with edible meat in Korea since May, 2000. Ostrich meat contains reddish color, which is low calorie, high protein, and low fat. Most of people preferred to high protein meat contained plenty of nutrients except high fat including high cholesterol. We could utilize as edible and palatable foods such as pure meat, large egg, bone including bone extraction, and fur. Therefore, this animals could be called as an economical poultry. Ostrich husbandry, in the future, should be maintained with environmental agriculture. Without our desirable environment, we as well as animals also could eventually be destruction. The characteristics of raising ostrich as well as duck is the use of remains of extra food as a recycling. Especially, ostrich eats very well voraciously everything to be edible. Especially, ostrich, in poultry, grows very well in early stage in course of growth. On the other hand, it is difficult for most of farmer to market and to improve the strategy of high qualities of meat. Accordingly, many farmers who are raising ostrich try to improve and to enhance feeding skill as well as reproductive and genetic breeding. And then, we should establish logical and systematical marketing strategy through good management including improvement of meat.
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曺圭錫 公州大學校 資源科學硏究所 1997 資源科學硏究論文集 Vol.5 No.-
This study was carried out to investigate the status of deer farms in terms of management, economics of scale, feed stuffs and so on. Sixty five deer farms were selected for survey from west region of Chung-Nam. Among which, 35 deer farms were selected from Asan. The results obtained were as follows; 1. The average number of deer were 15.76 heads of Elk or 21.66 heads of Sika deer in Asan, while 17.58 heads of Elk or 31 heads of Sika deer were found in the other region. 2. Considering management, farm owner management was 65.7%, Cooperative management was 28.8%, employer management was 5.71% in Asan and those of in the other region were 60%, 33.3%, and 6.6%, respectively. Sizes of farm land in Asan city were below 2,000 pyeong(6,605㎡): 68.5%, below 4,000 pyeong(13,210㎡): 17.1%, below 6,000 pyeong(19,815㎡): 8.57%, above 6,000 pyeong: 5.7% and those in the other region were 53.3%, 26.6%, 13.3%, 6.7%, respectively. 3. The major location of deer farms were southern exposure was rarely found. Fifty percent of deer farms were located along road side. In Asan city, 74.2% of deer farms were located at hilly area below 20°, while 66.6% in the other region. 4. Regarding to merit of deer farm, 51.4% of farmers in Asan responded to the comparatively easy management while 46.6% in the other region responded to high income. 5. More than 80% of deer farms used commercial feed of cattle, leisure than 20% used mixed deer feed. Fifty percent of roughages was leave in fall oak and below 10% used corn. As results, more scientific feeds for should be developed and hurb stuffs were recommended for enhancing efficiency and marketing.
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