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최미경,여인규,CHOE Mi-Kyung,YEO In-Kyu 한국수산과학회 2001 한국수산과학회지 Vol.34 No.4
Heritability estimations of masu salmon smelt at underyearing of age were described. Masu salmon was taken from aquaculture station of Mori in Japan. After fertilization, the offsprings in each family were reared in separate egg trays and fingerling tanks. The percentage of fish in each tank which smoltified at 11-month old was recorded, and environmental and genetic factors influencing the percentage smoltification were also studied. Percentage of smoltification was not significantly affected by the number of fish held in a tank, or fish density (correlation coefficient 0.10). However, there was a high correlation ($0.821\~0.565$) between smelt percentage and growth related traits of fish in a family. Heritability estimated from total data was $0.47\pm0.13$, when effects of tanks were ignored.
넙치 Paralichthys olivaceus 초대 배양 간세포의 난황 전구물질 합성에 미치는 estradiol-$17{\beta}$와 2,4-D의 영향
여인규,최미경,이영돈,임윤규,허문수,이제희,송춘복,Yeo, In-Kyu,Choe, Mi-Kyung,Lee, Young-Don,Lim, Yoon-Kyu,Heo, Moon-Soo,Lee, Je-Hee,Song, Choon-Bok 한국어류학회 2000 韓國魚類學會誌 Vol.12 No.3
Estradiol-$17{\beta}(E_2)$와 2,4-dichlorophenoxy acetic acid (2, 4- D)가 난황 전구물질의 합성에 미치는 영향을 넙치 Paralichthys olivaceus 간세포의 초대 배양을 통하여 조사하였다. 배양간세포의 생존율은 배양온도 $27^{\circ}C$에 서 가장 높게 나타났으며, $15^{\circ}C$에서는 생존율이 급격히 감소하여 약 50%의 생존율을 나타내었다. $E_2$에 의한 VTG 의 합성은 $10^{-6}M$에서 최대치를 나타내었다. 2, 4-D $10^{-7}\sim10^{-5}M$의 첨가에 의해 VTG의 합성은 이루어지지 않았다. 그러나, 저농도인 $10^{-8}M$에서는 VTG의 합성이 증가하였다. $E_2$ 및 2, 4-D에 의해 합성된 VTG는 $10^{-6}M$ tamoxifen의 첨가에 의해 유의하게 억제되었다 (P<0.01). 본 연구 결과에서 $E_2$와 2, 4-D의 동시 첨가는 VTG의 합성을 억제하지 않았다. 이러한 결과는 2, 4-D의 작용이 $E_2$와 유사한 작용을 가지지만, VTG의 합성에 있어서 $E_2$ 수용체에의 작용 양식은 서로 다른 것으로 추정된다. Effects of Estradiol-$17\beta(E_2)$ and 2, 4-dichlorophenoxy acetic acid (2, 4-D) on vitellogenin(VTG) production were investigated in primary hepatocyte culture of olive flounder, Paralichthys olivaceus. Highest survival rate of hepatocyte were observed at $27^{\circ}C$, which markedly declined equal to 50% of those of $15^{\circ}C$. Vitellogenin production peaked at the concentration of $10^{-6}M\;E_2$. No effect was observed on VTG production at various concentrations of 2, 4-D. However, a low concentration of 2, 4-D (ie, $10^{-8}M$) only appeared increased VTG production. $E_2$ or $10^{-8}M$ 2, 4-D-primed VTG production was markedly inhibited by the addition of $10^{-6}M$ tamoxifen to the culture medium(P<0.01). Inhibition was not affected by combinational treatment with $10^{-6}M$ $E_2$ and $10^{-6}M$ 2, 4-D. These results from the current investigation suggest that 2, 4-D mimics $E_2$, but the mechanism of reaction in inducing the $E_2$ receptor are different in VTG production in oliver flounder hepatocytes.
여윔증 넙치, Paralichthys olivaceus의 증상에 대한 병태생리학적 고찰
김이경 ( Yi Kyung Kim ),정준범 ( Joon Bum Jeong ),이무근 ( Mu Kun Lee ),박수일 ( Soo Il Park ),박명애 ( Myeong Ae Park ),최미경 ( Mi Kyung Choe ),여인규 ( In Kyu Yeo ) 한국어병학회 2011 한국어병학회지 Vol.24 No.1
This study was aimed to investigate the pathophysiological changes of olive flounder, Paralichthys olivaceus suffering from emaciation. A plasma osmolality was higher in the emaciated and control flounders than that of normal teleost, suggesting osmoregulatory failure in both of them. Also, the control in the same stock with emaciated flounder seem to be classified into a primary degree of emaciation. According to microscopic observations, the inflammatory responses were observed in the submucosal layer of anterior intestine, although the some of mucosal intestinal epithelium still remained. It was suggested that the pathological changes of the anterior part give rise to malabsorption of nutrients through the mucosa. In the posterior intestine and rectum, the mucosal epithelium were almostly sloughed off and severe inflammatory responses were observed in the submucosa. Immunoreaction for NKCC was not detected in the mucosal epithelial cells in intestine because of sloughing of epithelium. These changes would lead to functional disorder in the intestine, such as malabsorption of nutrients and osmoregulatory failure. Also important is to investigate the recovery phase.
무지개송어 Oncorhynchus mykiss 치어의 염분 내성에 관한 연구
최미경,여인규 한국어류학회 2002 韓國魚類學會誌 Vol.14 No.3
이 연구는 부화 후 23, 33, 158일령의 무지개송어 10가족의 전형매군에 있어서의 영분내성에 대하여 조사하였다. 염분내성은 무지개송어의 치어를 해수로 이동시킨 후 체중, 50% 사망시간(DT-(50)) 및 표피상피세포층의 두께를 조사하여 판단하였다. 무지개송어는 16‰의 해수로 옮긴 후 5일간에 걸쳐 26또는 32‰이 되도록 염분농도를 상승시킨다. 실험기간 중의 50% 사망시간은 성장과 함께 높아지는 경향을 나타내었으며, 각 시기의 가족간에 있어서도 유의적인 차이를 나타내었다. 한편 해수로 옮긴 후의 체중의 변화는 5개의 가족에서 일령의 증가에 따라 체중 감소율이 경시적으로 낮아지는 경향을 나타내었고, 그 외의 가족에서는 일령에 따른 일정한 경향이 나타나지 않았다. 표피상피세포층의 두께는 한 가족을 제외한 9개의 가족에서 감소하였다. 이상의 결과로 보아, 본 종에 있어서의 염분내성은 성장과 유전적 요인이 관련하여 나타나는 것으로 추정된다. 따라서 무지개 송어에 있어서 선발육종에 의한 염분내성이 강한 가족의 선발이 유효한 것으로 여겨진다. The seawater tolerance of 10 full-sib families of rainbow trout (Oncorhynchus mykiss) that are 23-, 33- and 158-day-old fry after button-up are described in this study. Body weight, 50% death times (DT_(50)), and epithelial cell layer after transfer into seawater were estimated for the salinity tolerance of rainbow trout fries. Ten full-sib families of rainbow trout were transferred into 1680 seawater, and salinity was increased gradually from 16‰ to 26 or 32‰ over five days. DT_(50) for all experimental period revealed growth-relatedly increasing. DT_(50) was also significant among families with increase in age. In addition, body weights of rainbow trout resulting from transfer into seawater decreased in five families with increase in their ages, but had no effect in the other five families. Thickness of epithelial cell layer decreased in nine families. These results suggest the seawater tolerance is related to the growth and genetic effects in this species. Selective breeding would be effective in improving seawater tolerance in rainbow trout.