• Korean Journal of Ichthyology
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• v.28 no.4
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• pp.215-222
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• 2016

Triploidy was induced in the marine medaka, Oryzias dancena by cold shock treatment ($0^{\circ}C$) of fertilized eggs for 30, 45, or 60 min, applied two minutes after fertilization. The triploid genotype was induced by each of the thermal shock regimes tested. The best result was obtained when the eggs were treated for 45 min, which induced triploidy in all the resulting fish. Triploidy was confirmed using chromosomal and flow cytometer analyses, and erythrocyte measurements. The surface areas and volumes of the erythrocytes of triploid fish were significantly larger than those of diploid fish, and their chromosome number (3N=72) was 1.5 times greater that for the diploids (2N=48). Based on a flow cytometer analysis, the triploid fish had approximately 1.5 times the cellular DNA content (2.40 pg/cell) of the diploid specimens (1.61 pg/cell). Data from this study provide the basis for the development of unique models for studying reproductive confinement in transgenic fish.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2003.05a
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• pp.309-310
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• 2003

현재 어류 질병 바이러스를 검출해내기 위해 이용되는 PCR법이나 ELIZA법 만으로는 신속성을 필요로 하는 바이러스 검출에서는 불리하다(Bruchhof et. al., 1995). 따라서 기존의 유전자 진단법을 대체할 수 있고, 동시에 수백 개 이상의 유전자를 빠른 시간 내에 검색할 수 있는 DNA chip 기술을 이용하여 넙치, 돔등의 해산어와 일부 연어과 어류에 질병을 일으키는 rhabdovirus를 신속하고 정확하게 진단할 수 있는 저밀도 oligonucleotide chip을 개발하고자 한다(Chizhikov et at., 2001). (중략)

• Korean Journal of Ecology and Environment
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• v.39 no.2 s.116
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• pp.157-166
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• 2006

Characteristics of ichthyofauna and fish community in the Lagoon Gyeongpo, Korea, were investigated from May to October 2005. Total 26 species caught during the period were belonged to 18 families. Dominant species was T. hakonesis (50.7%) and subdominant species was A. flavimaus (25.4%). K. punctatus (11.1%), M. cephalus (6.5%), E. japonicus (1.5%), C. castaneus (1.0%) were also numerous. Total biomass of collected fish was 401.8 kg, and biomass of each species was T, hakonensis 147.0 kg, A. flavimanus 135.8 kg, K. punctatus 85.6 kg and M. cephalus 23.8 kg. Seasonal variation of fish community seems to be related to spawning periods of species. In conclusion, it appeared that the ratio of the primary freshwater species was gradually decreased, while the peripheral freshwater and seawater species were gradually increased when compared to the data obtained from the past with respect to the ichthyofauna of the Lagoon Gyeongpo.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2003.05a
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• pp.326-327
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• 2003

스쿠티카충은 해산어류의 체표 둥과 같은 외부기관뿐만 아니라 뇌에까지 침입하며(Cheung et al., 1980; Ototake and Matsusato, 1986; Dragesco et al., 1995; Munday et al., 1997; Jee et al., 2001), 우리 나라에서는 양식 넙치에 심대한 경제적 손실을 야기 시키고 있다. 최근 본 연구팀에서는 넙치 스쿠티카증의 치료제로서 경구용 케토코나졸이 효과적임을 구명한 바 있으며 금번 연구에서는 스쿠티카증을 효과적으로 제어하기 위한 케토코나졸의 적정 약물 사용 방법을 제시하고자 투여용량에 따른 약물 동태학적 특성을 밝히고자 하였다. (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2003.05a
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• pp.324-325
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• 2003

스쿠티카충은 해산어류의 체표 등과 같은 외부기관 뿐만 아니라 뇌에까지 침입하여 양식산업에 심대한 경제적 손실을 야기시키는 기생충으로써(Cheung et al., 1980; Ototake and Matsusato, 1986; Dragesco et al., 1995; Munday et at.,1997; Jee et al., 2001), 이 기생충에 의한 국내의 양식 넙치 폐사량은 총 폐사량의 약 10 % 정도 내외에 이르고 있다. 본 연구는 체내에 감염된 스쿠티카충에 대한 케토코나졸의 치료효과를 검토하고 본 약물의 넙치에 대한 안전성을 분석코자 하였다. (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2003.05a
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• pp.322-323
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• 2003

연쇄구균병은 담수어 및 해산어에 패혈증을 일으켜 양식산업에 막대한 피해를 주는 질병이다. 해산양식어류인 방어(Kusuda et al., 1976; Minami, et al., 1979), 넙치(Nagatsugawa, 1983; Heo et al., 2001), 터봇(Domenech et al., 1996), gilthead sea bream 및 European sea bass (Zlotkin et al., 1998a) 등의 연쇄구균병에 관한 연구가 활발히 진행되고 있고, 특히 최근에는 PCR에 의한 신속진단 및 동정에 관한 연구가 이루어지고 있다(Aoki et al., 2000; Lee et al., 2001; Nguyen et al., 2002). (중략)

• Ocean and Polar Research
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• v.25 no.4
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• pp.469-481
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• 2003

This study is to suggest strategies for the aquaculture of marine fishes in Korea through the analysis of current domestic states and case studies of the advanced countries to enhance the competitiveness of the industry. To reveal the current state, a questionnaire study to the producers was carried out, and cases in Norway, China, Japan, USA were analysed in terms of national development strategies. From those analyses, 3 strategies for the improvement of the competitive edge in the industry were induced as followings. First, it is necessary to implement restructuring such as upsizing through consolidation of small units, networking, etc. Second, it is required to introduce the state-of-the-art technology with the newly-designed equipments to save energy and cost in the operation. Third, it is also required to implement programs to select the national strategic species and concentrate R&D resources on the selected ones.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2002.05a
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• pp.484-485
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• 2002

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2002.05a
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• pp.488-489
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• 2002

• Korean Journal of Environmental Biology
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• v.33 no.3
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• pp.314-329
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• 2015

The fish fauna was investigated from 2010 and 2013 at main stream and tributaries in the Seomjin River which has no estuary dike. The collected fishes were identified into 37,751 individuals of 107 species of 81 genera belonging to 41 families. Among the collected fishes the primary freshwater fishes were 57 species (Relative Abundance: 53.3%), the secondary fishes were 10 species (RA: 9.3%) and the marine fishes were 40 species (RA: 37.4%). The dominant species was Zacco platypus (RA: 28.7%), and the subdominant species was Zacco koreanus (RA: 15.0%). The endemic species were 21 species (RA: 31.3%). The endangered fishes were Acheilognathus somjinensis (Level I), Lampetra reissneri (Level II) and Microphysogobio koreensis (Level II). The exotic species were Carassius cuvieri, Lepomis macrochirus and Micropterus salmoides. We supposed that Odontobutis interrupta in the Seomjin River is translocated species.