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Rapid Species Identification of Elasmobranch Fish (Skates and Rays) using Oligonucleotide Microarray
윤현규,정다금,정인혁,정진욱,오문주,김성,이윤호,김충곤,황승용 한국바이오칩학회 2009 BioChip Journal Vol.3 No.1
Correct identification and classification of fish species is important for conservation and management of the fish resources. However, previous species identification in skates and rays based on morphological similarities and differences is sometimes misleading. All over the world, there are 485 species in Rajiformes. Despite high species diversity, the species in this family share similar morphological features. Therefore, an accurate species identification system is necessary in this family. In the present study, we developed an oligonucleotide microarray for species identification of skates in the waters of Korea. We verified genetic variation of skates by sequence analysis of mitochondrial cytochrome c oxidase subunit I (COI). All microarray results corroborated the species-specific sequences and allowed simple, fast and cost-effective discrimination of large number of samples. These results indicate that the oligonucleotide microarray can be a useful tool for rapid species identification of skates.
Development of Salmon Identification DNA Chip based on Mitochondrial COIII-ND3-ND4L Variations
윤현규,김고은,정다금,정진욱,정인혁,강수경,김충곤,황승용,이윤호 한국바이오칩학회 2008 BioChip Journal Vol.2 No.4
Salmon are born in fresh water, migrate to the sea, and then return to their natal river for reproduction. This feature has been utilized for their enrichment as commercial resources because the artificial rearing and release of fry and the catching of returning salmon become easy tasks. For proper management of salmon resources and fair trade of salmon products, a reliable identification of salmon species is necessary. However, species identification based on morphological features has often been inaccurate and time consuming in many cases. In particular, for processed salmon products in the market, the application of morphological features toward species identification is impossible. To resolve this problem, we have developed a DNA chip that distinguishes 9 species of salmonid fishes. DNA sequence variations in the mitochondrial DNA COIII-ND3-ND4L region were utilized for designing species-specific oligonucleotide probes. The probes were synthesized and covalently linked onto a glass slide in duplicate. Hybridization of the probes with single-stranded DNA target molecules labeled with a fluorescent dye produced species-specific hybridization spot patterns. The whole process of species identification took only about 4 hours. This DNA chip system provides a sensitive, objective, and high-throughput method for salmonid species identification, being especially useful for processed products in the market. This technique can be easily applied to other fish species.
김충곤(C.G. Kim),정다금(D.G. Jeong),김고은(G.E.Kim),김성(S. Kim),윤현규(H.K. Yoon),정진욱(J.W. Chung),황승용(S.Y. Hwang),이윤호(Y.H. Lee) 한국해양환경·에너지학회 2006 한국해양환경·에너지학회 학술대회논문집 Vol.2006 No.-
본 연구에서는 해양생물 (극피동물, 연어과와 홍어목 어류)의 종 판별을 보다 정확하게 하기 위하여 분자마커 및 DNA칩 개발을 시도하였다. 분자마커로 이용되는 유전자는 각 생물종마다 염기서열 차이를 보이는 Mitochondiral DNA 중 COI gene, COIII-ND3-ND4L 지역이다. In this study, we aim to identify Echinoderm, Salmonidae and Rajiformes by use of molecular marker in the mitochondrial DNA sequences (Cal gene and COIII-ND3-ND4L) and oligo nucleotide DNA chip.
Population genetic structure and demographic history of the fat greenling Hexagrammos otakii
Kazi Ahsan Habib,정다금,Jung-Goo Myoung,Min Seok Kim,장요순,Jae Seol Shim,Youn-Ho Lee 한국유전학회 2011 Genes & Genomics Vol.33 No.4
Fat greenling (Hexagrammos otakii) is an important commercial fish in the Northwestern Pacific, being distributed along the coastal waters of the East/Japan Sea and the Yellow Sea. To investigate population genetic structure and demographic history of this species, one hundred and fifty five individuals were collected from five localities in the distribution range of the species and sequence variations in the mitochondrial genes COI, COIII-ND3-ND4L, and cytochrome b were examined. For all the genes in every sampling location, the nucleotide diversities were very low (0.001 ~ 0.005) although the haplotype diversities were relatively high, 0.55 ~ 0.81 for COI, 0.79 ~ 0.84 for COIII-ND3-ND4L, and 0.95 ~ 0.97 for cytochrome b. Hierarchical analysis of molecular variance (AMOVA), the conventional population statistic FST, and exact test of population differentiation revealed no significant genetic structuring among the samples, indicating that fat greening is panmictic throughout the range of its distribution. Neutrality tests such as Tajima’s D and Fu’s FS statistics and mismatch distribution analyses suggested that fat greening has undergone the demographic history of population expansion during the late Pleistocene period approximately 91,000 ~327,000 years ago. The star-burst patterns of haplotype networks and low nucleotide diversities also indicated recent population expansion. These results help establish the fisheries management strategy for fat greenling in the Northwestern Pacific.
Kazi Ahsan Habib,정다금,명정구,이윤호 한국해양과학기술원 2015 Ocean science journal Vol.50 No.2
The population genetic structure and historical demography of spotty belly greenling, Hexagrammos agrammus, which has limited distribution in the Northwest Pacific, was assessed with partial sequences of the mitochondrial DNA (mtDNA) cytochrome b and the control region (D-loop). A total of 103 individuals were collected from four sites located at the Korea Strait (Southern coast of Korea) and the East coast of Korea and two places in the Pacific coast of Japan. For all the populations, nucleotide diversities were low (0.006 - 0.009) while the haplotype diversities were as high as 0.92 to 0.97, indicating that the fish has undergone a recent population expansion after experiencing bottleneck. Star-shaped patterns of haplotype networks as well as the significant negative values of Tajima’s D and Fu’s FS corroborate the recent population expansion. Mismatch distribution analysis reveals that the demographic expansion of the species started during the 2nd half of the Middle Pleistocene Series approximately 141,000 - 406,000 years ago. Hierarchical analysis of molecular variance (AMOVA), the pairwise population statistics (FST), and the exact test of haplotype differentiation demonstrate no significant genetic differentiation among populations investigated, suggesting that spotty belly greenling is panmictic in the East Sea and the Pacific coast of Japan.
태양돛 임무수행을 위한 초소형 위성의 자세제어 기초연구
구소연,유연아,최연준,김왕현,정다금,김성욱,유이슬,강래희,이문규,김승균,석진영 한국항공우주학회 2013 한국항공우주학회 학술발표회 논문집 Vol.2013 No.4
태양돛은 우주공간에서 태양풍에 의해 가해지는 압력을 이용하는 추진방식이다. 본 논문에서는 이러한 태양돛의 개념을 적용하여 지구 궤도를 유지하는 임무를 수행할 초소형위성의 기초설계를 수행하였다. 초소형 위성의 탑재시스템과 태양돛의 구동 및 운용 원리를 구현하고, 태양돛 피치각 제어를 통하여 지구 및 태양을 지향하기 위한 임무의 실현 가능성을 고찰한다. 이를 위해 태양돛 사출 메커니즘 설계 및 태양돛 관찰을 위한 카메라 시스템 설계, 태양돛 운용환경/시스템 모델링 및 자세제어 시뮬레이션을 수행하였다. Solar sailing is the propelling method which gains the thrust of a spacecraft from solar radiation pressure. This paper applies the principle of a solar sailing to a cube satellite for performing precise altitude control in Earth orbit. The payload system of the cubesat and the actuation/operation of the solar sail are preliminarily designed, and the feasibility of the proposed mission is investigated for Earth/Sun pointing by pitch attitude control. For this aim, this study focuses on designing solar sail deploying mechanism and a camera system to observe the solar sail, modelling of the solar sail and its operating environment, and simulations for attitude control.
조홍연,김성,이윤호,정길아,김충곤,정다금,이유철,강미혜,김하나,최해영,오지나,명정구,최희정 한국해양과학기술원 2017 Ocean and Polar Research Vol.39 No.1
Temporal changes in the number of zooplankton species are important information for understanding basic characteristics and species diversity in marine ecosystems. The aim of the present study was to estimate the optimal monitoring frequency (OMF) to guarantee and predict the minimum number of species occurrences for studies concerning marine ecosystems. The OMF is estimated using the temporal number of zooplankton species through bi-weekly monitoring of zooplankton species data according to operational taxonomic units in the Tongyoung coastal sea. The optimal model comprises two terms, a constant (optimal mean) and a cosine function with a one-year period. The confidence interval (CI) range of the model with monitoring frequency was estimated using a bootstrap method. The CI range was used as a reference to estimate the optimal monitoring frequency. In general, the minimum monitoring frequency (numbers per year) directly depends on the target (acceptable) estimation error. When the acceptable error (range of the CI) increases, the monitoring frequency decreases because the large acceptable error signals a rough estimation. If the acceptable error (unit: number value) of the number of the zooplankton species is set to 3, the minimum monitoring frequency (times per year) is 24. The residual distribution of the model followed a normal distribution. This model can be applied for the estimation of the minimal monitoring frequency that satisfies the target error bounds, as this model provides an estimation of the error of the zooplankton species numbers with monitoring frequencies.