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염분변화가 망둑어과 어류 3종의 생존 및 성장에 미치는 영향
황운기 ( Un Gi Hwang ),민은영 ( Eun Yong Min ),강주찬 ( Ju Chan Kang ) 한국환경생물학회 2012 환경생물 : 환경생물학회지 Vol.30 No.1
Abstract - The gobiidae, Tridentiger trigonocephalus, Chasmichtthys dolichognathus and Favonigobius gymnauchen were reared for 4 weeks under 0~33.6‰ salinity conditions to examine the effects of various salinity on its survival and growth. Survival rate of C. dolichognathus and F. gymnauchen were significantly declined below 3.4‰ and 0‰, respectively. Growth rate of T. trigonocephalus was significantly reduced 0‰ salinity. Growth rate of C. dolichognathus and F. gymnauchen exposed to >13.4‰ and >6.7‰ were significantly higher than those of gobiidae exposed to below <10.1‰ and <3.4‰ salinity, respectively. This study reveled that low salinity (<3.4‰) reduced survival and growth rates of the 3 gobiidae suggesting potential influence on the natural mortality of gobiidae in the coastal areas.
TBT 노출에 따른 돌돔, Oplegnathus fasciatus의 성장 및 혈액성분의 변화
황운기 ( Un Gi Hwang ),김준환 ( Jun Hwan Kim ),강주찬 ( Ju Chan Kang ) 한국어병학회 2013 한국어병학회지 Vol.26 No.3
본 실험은 TBT에 노출된 돌돔의 성장 및 혈액학적 변동을 검토하기 위하여 실시하였다. 돌돔은 TBT0, 1, 2, 4, 8 μg/L 농도에서 4주간 노출하였다. 돌돔의 성장은 8 μg/L TBT 농도에서 유의한 감소를 나타냈다. RBC count, hematocrit 값, hemoglobin 농도, 혈청glucose 농도는 8 μg/L TBT 농도에서 유의한 감소를 나타낸 반면, 총 단백질 농도는 유의한 증가를 나타냈다. 또한 GOT 및 GPT 활성은 8 μg/L TBT 농도에서 유의한 증가를 나타냈다. 따라서 해역에 TBT 농도8 μg/L 이상의 존재할 경우에는 돌돔의 성장 및 혈액학적 변동이 예상된다. Experiments were carried out to investigate the growth and hematological parameters of rock bream Oplegnathus fasciatus exposed to several different concentrations (0, 1, 2, 4, 8 ㎍/L) of tributyltin (TBT) for 4 weeks. Growth rate of the fish exposed to 8 ㎍/L of TBT concentration was significantly lower than that of control group fish. The major hematological findings were significant decreases in the red blood cell count, hematocrit value and hemogobin concentration in the fish exposed to 8 ㎍/L. Although serum glucose concentration was significantly reduced compared to the control group, total protein concentration was found to be significantly increased over the control group. Exposure to 8 ㎍/L of TBT concentration resulted in significant increase in the enzyme activities, such as glutamic oxalate transminase and glutamic pyruvate transminase in the fish. The present findings suggest that exposure to 8 ㎍/L concentration of TBT can cause significant changes in growth and hematological parameters of rock bream Oplegnathus fasciatuso.
곤쟁이, Neomysis awatschensis의 생존, 성장 및 산소 소비율에 미치는 염분의 영향
지정훈 ( Ji Jeong Hun ),황운기 ( Hwang Un Gi ),강주찬 ( Kang Ju Chan ) 한국환경생물학회 2003 환경생물 : 환경생물학회지 Vol.21 No.1
곤쟁이, Neomysis awatschensis의 염분 내성을 파악하기 위하여 40일동안 다양한 염분에 노출시켜 생존, 성장 및 산소소비율에 미치는 염분의 영향을 조사하였다. 생존율은 6.7‰ 이하의 염분에서 40일 이후에 현저하게 감소하였다. 곤쟁이의 체장과 일간 성장률도 40일 이후, 6.7‰ 이하의 염분에서 10.1% 이상의 염분 농도구와 비교해 현저히 감소하였다. 산소소비율은 40일 동안 10.1~33.6‰에 노출된 곤쟁이의 경우에는 염분처리 전과 비교해 큰 변화를 나타내지 않았지만, 6.7‰ 이하의 낮은 염분 농도에서는 곤쟁이의 생존, 성장 및 산소소비율이 감소한다는 것을 나타내고 있으며, 하구나 연안지역에서 염분이 6.7‰ 이하로 낮아질 경우에 서식하는 곤쟁이의 자연 사망률에 잠재적으로 영향을 미칠 수 있다는 것을 암시한다. Effects of salinity on survival, growth and oxygen consumption rates were examined in the mysid, Neomysis awatschensis. Mysids were exposed to various concentrations of salinity (0, 3.4, 6.7, 10.1, 13.4, 20.2, 27.4 and 33.6‰) for 40 days. Survival rate was significantly declined at below 6.7‰ after 40 days. Body length and daily growth rate of mysids exposed at below 6.7‰ salinity were significantly decreased than those of mysids exposed at above 10.1‰ salinity. Oxygen consumpiton rate of mysid exposed at salinity raining of 10.1 - 33.6‰ during 40 days not greatly changed in comparison with that before salinity treatment, but that of mysid exposed at below 6.7‰ significantly decreased. These results indicated that low salinity concentration ( ≤ 6.7‰) reduced survival, growth and oxygen consumption rates of the mysid suggesting potential influence on the natural mortality of Neomysis awatschensis in the estuarine and coastal areas.
김준환 ( Jun Hwan Kim ),황운기 ( Un Gi Hwang ),강주찬 ( Ju Chan Kang ) 한국수산과학회 2012 한국수산과학회지 Vol.45 No.2
The estuarine Gobiidae Tridentiger trigonocephalus, Chasmichthys dolichognathus and Favonigobius gymnauchen were exposed to various heavy metals . As a measure of acute toxicity, the 96h-LC50 in the three species exposed to copper, lead, zinc and chromium was 740-990, 1,660-1,980, 6,180-8,490 and 8,830-11,296 μg L-1, respectively. In order of toxicity, the heavy metals were ranked copper>lead>zinc>chromium. The Gobiidae C. dolichognathus was more sensitive to heavy metals than T. trigonocephalus and F. gymnauchen.
구리 노출에 따른 넙치, Paralichthys olivaceus 치어의 만성독성
강주찬 ( Kang Ju Chan ),김재원 ( Kim Jae Won ),김성길 ( Kim Seong Gil ),황운기 ( Hwang Un Gi ) 한국환경생물학회 2003 환경생물 : 환경생물학회지 Vol.21 No.1
연안지역의 환경오염 및 양식용수의 이용과정에 파생될 수 있는 구리의 오염에 따른 넙치의 생존, 대사율, 사료효율 및 성장률에 미치는 구리의 영향을 검토하였다. 4개의 아치사구리 농도(50, 80, 180, 320㎍ L^(-1))에서 6주동안 실험하였다. 실험기간 동안 넙치는 대조구에서 실험종료시 까지 사망개체가 전혀 나타나지 않아 100%의 생존율을 나타내었다. 구리 노출농도 180 ㎍ L^(-1)에서는 노출 4주부터 감소하기 시작하였으며, 노출기간이 길어짐에 따라 지속적으로 감소하여 노출 6주에서는 84.0%까지 감소하였다. 또한 구리 노출농도 320㎍ L^(-1)에서 노출 2주부터 감소하여 노출 6주에 82.0%로 높은 두 개의 농도구에서 유의한 감소가 나타났다. 산소 소비량은 노출농도 180, 320㎍ L^(-1)에서 대조구보다 각각 27.0, 42.0%가 저하하여 유의한 감소를 나타냈다. 사료효율은 대조구가 43.6%로서 가장 높은 효율을 나타냈고, 노출농도가 320㎍ L^(-1)에서는 30.0%로서 가장 낮은 성장 상태를 보였으며, 노출농도 80㎍ L^(-1)이상에서는 대조구에 비해 유의한 감소를 나타냈다. 성장률은 대조구에서 평균 16.8%로 나타나 가장 높은 성장을 보였으며, 노출농도 320㎍ L^(-1)에서는 5.4%로서 가장 낮은 성장을 보였다. 성장률의 전체적인 양상은 노출농도가 증가할수록 성장이 떨어지는 결과를 보였으며, 사료효율과 마찬가지로 노출농도 80㎍ L^(-1)이상에서 유의한 감소를 나타냈다. N/A
외인성 Estrogen에 노출된 조피볼락, Sebastes schiegeli 치어의 혈장 VTG과 GPT의 변화
황운기,강주찬 한국환경독성학회 2002 환경독성보건학회지 Vol.17 No.3
Changes of plasma vitellogenin (VTG) and glutamate pyruvate transaminase (GPT) were examined for determining whether hepatocyte was damaged during the process of VTG induction in the juvenile rockfish, Sebastes schlegeli exposed to exogenous estrogen (estradiol-17β, E₂). Rockfishes were intraperitoneally injected with E₂(5 mg/kg B.W.) in 70% ethanol and plasma sampling were extracted at 0, 1, 3, 6, 9, 12, l5 days after E₂ administration. VTG and GPT were then analyzed by SDS-PAGE and Reitman-Frankel method, respectively. VTG band was detected at a molecular weight position of 175 kDa on Day 3 after E₂ administration. This band became more distinct at 6 days, but its was gradually thinned with time-course, and not detected at 15 days. GPT was suddenly increased at 1 days after E₂ administration and highest GPT was detected at 3 days. However, OPT was gradually decreased with time-course as the change of VTG. These results suggest that the process of VTG induction by exogenous E₂ damage to hepatocyte, and plasma GPT was temporarily increased in the juvenile rockfish.
TBT의 노출에 따른 넙치, Paralichthys olivaceus의 생존, 성장 및 산소소비의 변화
강주찬,황운기,지정훈 한국환경독성학회 2002 환경독성보건학회지 Vol.17 No.3
This study was carried out to examine the effects of his (tribytyltin)oxide (TBT), endocrine disrupting compounds (EDCs), on the changes of survival, growth and oxygen consumption rate in the oliver flounder, Paralichthys olivaceus. Oliver Flounders were exposed to sublethal concentration of TBT (0, 1.67, 3.20, 6.30 and 12.50㎍/L) during 6 weeks. Survival rate was decreased in a concentration and exposure period-dependent way and suddenly the reduction of more than 20% occurred at TBT concentration greater than 3.20㎍/L after exposure 6 weeks. Growth rate and feed efficiency significantly decreased at concentration greater than 3.20㎍/L. Oxygen consumption rate was also decreased in a concentration-dependent way and significantly decreased to 17, 48 and 67% than that of the control at the TBT concentration of 3.20, 6.32 and 12.50㎍/L, respectively. This study revealed that high TBT concentration (≥ 3.20㎍/L) reduced growth and oxygen consumption rates of the juvenile oliver flounder suggesting potential influence on the natural mortality of Paralichthys olivaceus in the coastal areas.