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RISS 인기검색어
- 검색키워드
- 저자 : Gyurae Kim (검색결과 4 건)
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Mercury poisoning in Eurasian river otter (Lutra lutra)
Kim Gyurae,Ahn Sangjin,Lee Sang-Joon,Koh Ba-Ra-Da,Choi Soo-Young,Cho Ho-Seong,Oh Yeonsu 한국생태학회 2023 Journal of Ecology and Environment Vol.47 No.2
An adult male Eurasian river otter (Lutra lutra) with ataxia and lethargy was rescued. Through the necropsy of this otter with neurological symptoms, a broad range of vascular damage caused by mercury toxicity in several organs, hepatocellular necrosis, and vacuolation in the brain. In mercury examination, liver, kidney, and hair showed values of 0.878 ± 0.027, 1.807 ± 0.049, and 5.712 ± 0.102 μg/g, respectively. Compared with certified reference material, it was confirmed that the concentration of mercury were 6.7 times, 13.7 times, and 43.3 times higher, respectively. When the symptoms and diagnosis results were comprehensively reviewed, this otter’s demise was revealed due to mercury poisoning. The mercury concentration in the liver does not exceed the lowest observed effect level of 3.4 μg/g. However, even at low concentrations, long-term accumulation can cause symptoms including neuropathy, and the possibility that these heavy metals have accumulated in other wild animals cannot be ruled out. It seems that continuous monitoring using sentinel animals is necessary.
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Gyurae Kim,Sang-Joon Lee,Taeyeon Kim,Krisdianti,Sulhi Aufa,Hyunsook Min,Gyeongchan Go,Ho-Seong Cho,오연수 한국동물위생학회 2022 韓國家畜衛生學會誌 Vol.45 No.2
The purpose of this study is to evaluate the reduction effect of microbially activated peat on odor generated by livestock farms. The odor gas was measured by stirring the livestock manure sample with the existing litter and the microbially activated peat (Healtha Peat) was developed by this re-search team. In outdoor farm experiment, the measurements were performed by comparing broilers farm using rice husks and microbially activated peat as litter. The weight, mortality, shipment date, and odor levels (NH3) were measured before and after experiment. The result showed that NH3 levels were reduced by 100% in the Healtha Peat mixed group, Healtha Peat and rice husks mixed group. In the peat mixed group, Healtha Peat and saw dust mixed group showed reduce value at 99.6% and 99.1%, respectively. However the rice husks mixed group and saw dust mixed group showed a rela-tively weak NH3 reduction effect with values of 57.5% and 84.8%, respectively. After 3 months, the Healtha Peat mixed group and Healtha Peat and rice husks mixed group showed the highest NH3 reduction effect persistence. In the outdoor farm experiment, NH3 was present in farms using rice husks, but not in farms using Healtha Peat. In farms using Healtha Peat, the mortality and NH3 were reduced by 75% and >90%, respectively. The average body weight increased 18% and resulted to 10% decrease in the shipping date. These results implied that microbially activated peat has a clear effect on farm NH3 reduction and affects the productivity of farm animals.
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Productivity increase and odor reduction effect of fermented barley sprout extract in broiler farms
Gyurae Kim,Ho-Seong Cho,Sang-Joon Lee,Hyunsook Min,Gyeongchan Go,Dongseob Tark,오연수 한국동물위생학회 2022 韓國家畜衛生學會誌 Vol.45 No.4
The current study examined the impact of fermented barley sprout extract prepared using lactic acid bacteria (Lactobacillus sp.) in decreasing odor and increasing livestock productivity and measured the difference in the polyphenol and flavonoid contents of the extract after fermentation. Further-more, the effectiveness of fermented barley sprout extract was evaluated through order level and production index of livestock by supplying it to a broiler house. The results showed that with fer-mented barley sprout extract, the polyphenol and flavonoid contents were increased significantly by 174% and 562%, respectively. When the extract was applied as an additive to drinking water in the test farm, the productivity improved by about 10%, the mortality rate was reduced by about 66%, and there was a significant decrease in odor by about 80%. Compared with the control group, the produc-tion index increased by about 21%, the feed requirement decreased by about 8%, the odor showed a decrease in the NH3 level, and no other gas was detected. It was observed that lactic acid bacteria settle in the intestine, suppress the proliferation of bacteria that cause diarrhea and enteritis, and help digestion. The lactic acid bacteria effectively remove bad odor gases such as NH3, Amines, H2S and CH4S. Such odor reduction improves productivity. Our findings provide valuable information for quality water supply, production optimization and livestock management.
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Isolation and identification of mosquito-borne zoonotic diseases in slaughterhouse in Daejeon
Youngju Kim,Gyurae Kim,Sunkyong Song,Youngshik Jung,Seojin Park,Sang-Joon Lee,Ho-Seong Cho,Yeonsu Oh 한국동물위생학회 2023 韓國家畜衛生學會誌 Vol.46 No.2
This study was performed to investigate the distribution of mosquito vectors related to the zoonotic disease in Daejeon. Samples were taken using a blacklight trap once a month from March to November 2021 at the slaughterhouse in Daejeon. A total of 820 mosquitoes were captured and classified into 5 genera and 8 species. Among the collected mosquitoes, 319 (38.9%) and 295 (35.93%) were Aedes vexans nipponii and Culex pipiens pallens , respectively, making them the dominant species. The overall number of mosquitoes collected started to increase from May and reached the largest value of 329 (40.12%) in June. Trapped mosquitoes are created 72 pools by environmental condition and by species. The pools were tested by PCR methods for 7 zoonotic pathogens. Flaviviruspositive products were confirmed by DNA sequencing. Japanese encephalitis viruses were detected in 3 pools collected from cow lairage (Culex pipiens pallens ) in May, cow by-product processing room (Aedes vexans nipponii ) in June and cow lairage (Mansonia uniformis ) in June. Culex flavivirus were detected in 4 pools. Based on the results of this study, it is considered that continous surveillence of mosquitoes in livestock assembly facilities (slaughterhouse) should be performed for controlling mosquito populations and mediating disease spread by mosquitoes.
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