• The Korean Journal of Zoology
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• v.36 no.4
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• pp.545-555
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• 1993

뱀장어속(Anguilla)의 뱀장어(A. ioponica)와 무태장어(A. marmoruta) 및 꾀붕장어(Anago anogo)의 유전적 특징과 종간 유연관계를 밝히기 위하여 isozyme 분석과 mtDNA 분석을 실시하였다. Isozyme 분석결과 20개의 효소 및 비효소단백질에서 총 39개의 유전자를 검출하였고 각종 특유의 genetic marker를 확인하였다. 3종의 평균 유전적 변이는 뱀장어가 HD=0.057. HG=0.065, 무태장어는 HD=0.067 HG=0.053, 체불장어가 HD=0.018. HG=0.020으로 각각 나타났다. 뱀장어와 무태장어의 평균 종간유전적 근인관계는 S=0.420 (D=0.869)로 멀게 나타났다. 6 base를 인지하는 10종류의 제한효소를 처리한 결과 mtDNA 절편양상은 각 종내에서 동일하게 나타났으나 각종간에 차이를 보였고, 종간 평균염기 치 환율은 뱀장어와 무태장어가 p=3.4%, 뱀장어속 2종과 꾀붕장어는 p=9.6%로 나타났다.

• Korean Journal of Heritage: History & Science
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• v.11
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• pp.83-88
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• 1977

• Korean Journal of Environment and Ecology
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• v.30 no.3
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• pp.353-368
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• 2016

This study surveyed the diversity and distributional characteristics of benthic macroinvertebrates and freshwater fish during the period from April to October, 2015 in Seonun Mountain Provincial Park. As a result, a total of 78 species of benthic macroinvertebrates belonging to 50 families, 16 orders, and four phyla were observed in Seonun stream; additionally, 25 species of freshwater fish belonging to six families were identified in all the investigated sites. Among benthic macroinvertebrates, Ephemeroptera(13 spp.: 22.81%) was the largest group in terms of species richness. In the FFGs, gathering-collectors(30 spp.: 36.14%) were relatively larger as represented by Ephemeroptera that usually inhabit fast flowing streams. In the HOGs, clingers(23 spp.: 29.49%) and burrowers(17 spp.: 21.79%) were the dominant groups. For both EPT ratio and ESB index, site 8 appeared to be the highest with 44.44% and 72 marks respectively, while the sites 4 and 9 showed relatively lower rates and indices. According to the results of evaluation, site 8 needs to be designated as the highest protection area while the sites 4 and 9 may be designated as target areas for preferential improvement. According to the analysis of fish community, the dominant species was Zacco teminchkii(333 inds.: 36.80%), and the dominant index was the lowest(0.24) and diversity index was the highest(1.81) at site 8, which therefore represents a stable freshwater fish community. In this survey, six Korean endemic species were identified: Ephemera separigata, Neoperla coreensis, Rhodeus uyekii, Squalidus gracilis majimae, Microphysogobio yaluensis, and Iksookimia koreensis. Also, three species belonging to the management of exportable group(Davidius lunatus, E. separigara, N. coreenis) were observed. Two habitat specific species: Thraulus grandis and Anguilla marmorata, were found for the first time in Gochang area and marked on the Korean distribution map through discussion.

• Korean Journal of Environment and Ecology
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• v.12 no.1
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• pp.42-57
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• 1998

Cheju island had that a fresh water Pisces composed of 9 Orders, 12Families, 24 Species, Amphibians composed of 2 Orders, 6 Families, 9 Species, Reptiles composed of 2 Suborders, 5 Families, 10 Species, Aves composed of 18 Orders, 49 Families, 236 Species and Mammalian composed of 6 Oredrs, 9 Families, 16 Species. So, total vertebrate's fauna were 35 Oredrs, 2 Suborders, 80 Families, 4 Subfamilies and 295 Species. Endemic species of the Cheju island were Mustela sibirica quelpartis, Apodemus agrarius vhejuensis, Micromys minutus hertigi and Crocidura russula quelpartis, Ageithalos caudatus trivirgatus, Sitta europaea bedfordi, Eophona personata personata and Dendrocopos oeucotos quelpartis, Troglodytes troglodytes fumigatus, Parus major minor, Cettia diphone cantans and Hynobius leechii quelpartis. Especially, Sibynoghis collaris and Anguilla mauritiana were only habitated in the Cheju island. And the Cheju island was formed in extending from Plieocene to Pleistocene. Differentiation of species was continued by geological isolation 0.3 million years that repeating glacial epoch and interglacial epoch.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.55 no.5
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• pp.697-704
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• 2022

This study was investigated to evaluate the level of acute TAN (total ammonia nitrogen) and NO₂^--N concentrations at pH levels of 6.0, 7.0 and 8.0 for 96 h in juvenile marbled eel Anguilla marmorata (total length 209.0±22.02 mm and body weight 13.0±5.01 g). The result of the present study showed that the survival rate of juvenile eel at TAN concentrations 0, 100, 200, 300, 400, and 500 ppm at pH 6.0, pH 7.0, and pH 8.0 were 100, 100, 96.7, 74.4, 31.1, and 0%; 100, 82.2, 61.1, 36.7, 0, and 0%; and 98.9, 55.6, 8.9, 0, 0, and 0%, respectively. In addition, the survival rate of juvenile eel at NO₂^--N concentrations 0, 100, 200, 300, 400, and 500 ppm at pH 6.0, pH 7.0, and pH 8.0 were 100, 43.3, 21.7, 0, 0, and 0%; 100, 76.7, 65.0, 43.3, 21.7, and 13.3%; and 100, 100, 100, 88.3, 78.3; and 58.3% respectively. The 96h-LC₅₀ at pH 6.0, 7.0, and 8.0 were 332, 235, and 167 mg/L for TAN, and 188, 296, and 711 mg/L for NO₂^--N, respectively. The acute toxicity of TAN to juvenile eel increased exponentially with increase in pH, whereas the acute toxicity of NO₂^--N to juvenile ell increased with low levels of pH and lengthening of exposure time to NO₂^--N.