• The Korean Journal of Zoology
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• v.19 no.4
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• pp.171-178
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• 1976

A new species of Cobitid fish, Cobitis longicorpus is described, based upon many specimens from several tributaries of the Seomjin River situated in the south western part in Korea. Cobitis longicorpus was previously reported as the crossband type of C. taenia by all ichthyologists in Korea. This is distributed in the Seomjin River and characterized by the distinctive cross-band color pattern, the black spots at the back of its opercula, and the structure of lamina circularis in male.

• Korean Journal of Ichthyology
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• v.13 no.1
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• pp.1-5
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• 2001

Taxonomic review of Cobitis laterimaculata was carried out based on 17 specimens collected from the Caozejiang River, Huangzezhen, Shengxian county, Zhejiang province, China. The species shares several notable characters with Niwaella spp., including the posterior position of the dorsal fin, small head, color pattern without pigmentary zones of Gambetta, short and curved suborbital spine, short and subequal barbels, strong carina on caudal peduncle, and lack of a lamina circularis on the pectoral fin base in males. We conclude that Cobitis laterimaculata should be transferred from Cobitis to Niwaella.

• Korean Journal of Ichthyology
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• v.9 no.1
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• pp.121-129
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• 1997

The five species of genus Cobitis from Korea were investigated by electron microscopes to clarify the adhesive membranes on zona radiata. In the late vitellogenic stage the adhesive membranes could be classified into two form as follows: 1) granular form of Cobitis lutheri, C. striata, C. sinensis, and C. sinensis-longicorpus, 2) villous form of C. melanoleuca. Although C. lutheri, C. striata, C. sinensis, and C. sinensis-longicorpus possessed the same granular form, it was evident that fine structure of the zona radiata varied according to species. The adhesive membranes and fine structures of zona radiata in Cobitis showed a species specificity closely related to their habitats and spawning properties.

• Animal cells and systems
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• v.6 no.1
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• pp.45-51
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• 2002

We compared the complete mitochondrial cytochrome b gene sequences of Korean and European cobitids to provide independent evidence for assessment of systematic and biogeographic relationships of species in the genus Cobitis. The data suggested monophyly of the genus Cobitis and the inclusion of Korean Cobitis species within the group having one lamina circularis, a primitive condition. Also, all the phylogenetic analyses using maximum parsimony, maximum likelihood, and neighbor joining methods showed a monophyletic relationship among Cobitis. The basal position of the Caspian C. cf. sibirica reported here reflects the eastern Asiatic origin cf. the European Cobitis and establishes C. cf. sibirica as an independent lineage. The Korean C. pacifica diverged next to C. cf. sibirica in basal group from the genus Cobitis. This result is in agreement with the hypothesized Asiatic origin of some European freshwater fish lineages. The phylogenetic relationships in this study showed a close affinity between C. zanadreai and C. sinensis. Two new species, C. tetralineata and C. pacifica in Korea also are closely related to monophyletic group clustering the type species of the Acanestrinia subgenus (C. elongata) with all the endemic Italian species (C. bilineata and C. zanandreai). This may suggest that the affinity between the Korean and Danubian-Italian imply genetic convergence or genetic plesiomorphic state between allopatric species that are separated for the Miocene. The mtDNA-based phylogeny for the species of the genus Cobitis from Kores and Europe permits phylogenetic assessment of the morphological transitions of Iamina circularis.

• Korean Journal of Ichthyology
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• v.21 no.sup1
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• pp.7-28
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• 2009

The family Cobitidae of Korea was reviewed as 16 species in 5 genera with the key to species for the identification by the external features. The three genera of Iksookimia, Koreocobitis, and Kichulchoia erected from the genus Cobitis were reclassified based on the presence or absence of Gambetta’s zones on the body sides, their body pigmentation, the shape of lamina circularis in males, the number of unbranched anal fin rays, and some molecular phylogenetic data. By the results of these reexamination, the generic names of the three species were changed as Cobitis choii, Iksookimia pacifica, and Kichulchoia mutifasciata. It was remarked biogeographically that most species of genera Cobitis, Iksookimia, Koreocobitis, and Kichulchoia show the disjunct distributions with bottom-dwelling preferences as endemic to Korean peninsular. Three species of Cobitis choii, Kichulchoia brevifasciata, and Koreocobitis naktongensis are considered to be critically endangered according to the severe habitat destruction and the alteration of river topography.

• Korean Journal of Ichthyology
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• v.22 no.1
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• pp.56-60
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• 2010

The Cobitis hankugensis-Iksookimia longicorpa complex from Korea has been presumed to be a unisexual lineage, originating from C. hankugensis and I. longicorpa and having almost all females. Recently, it was confirmed that the complex consisted of one diploid and two triploid complexes. From observation of their oocyte envelopes, three forms could be classified: a villous projection in I. longicorpa, a granular one in C. hankugensis and two triploid complexes, and a granule with villous one in the diploid complex. Even within the same granular projection, they showed specific features in length and density number from each other. These architectures are first observed in cobitid complexes and may playa role in identification of diploids and triploids.

• The Korean Journal of Zoology
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• v.30 no.1
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• pp.71-78
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• 1987

한국산 기름종개의 학명사용에 정확을 기하기 위하여 우리나라 낙동강의 15개수역에서 채집된 1,472마리의 기름종개 표본과 유럽산 기름종개 표본을 비교검토하였다. 종전에 국내에서 C.taenia로 간주하였던 낙동강산 표본은 체측과 배면 반문의 수와 모양, 입수염의 길이, 및 안하극말단의 위치등의 유럽산 C.taenia와는 달리 중국산 C. sinensis와 더 유사하였다. 따라서 우리나라 낙동강산 기름종개 표본은 Cobitis sinensis et Dabry, 1874의 학명을 사용하는 것이 타당하다고 판단된다.

• Korean Journal of Ichthyology
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• v.4 no.2
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• pp.72-76
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• 1992

The sex ratio and gonadal histology were investigated in the Cobitis lutheri Rendahl collected from the Tamjin River of Chollanam-do Province. Korea. The ratio of males declined in proportion to increase in size, while that of females increased in proportion to increase in size. Hermaphrodites were found in the intermediate size fishes. They had degenerating testicular tissue and developing ovarian tissue simultaneously. These phenomena were discussed in relation to skewed sex ratios.

• The Korean Journal of Zoology
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• v.35 no.4
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• pp.497-504
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• 1992

한국특산종인 Colitis rotundicuudutu의 지리적 변이를 전국 5개 집단 132개체를 대상으로 조사하였다. 4개 집단의 계측형질로 본 다변량분석 결괴 산청집단은 타 집단과 형태적 차이가 있었다 전기영동으로 조사된 5개 집단의 평균 유전적 변이 정도는 A=1.48, P=37. IpA, HD=0. 139, 및 H6=0. 124로 변이 정도가 타 어류에 비하여 비교적 높았다. 5개 집단의 평균 유전적 근인치(S)는 0.83으로 낮았으나 산청집단을 제외한 4개 집단의 근연치는 0. 91로 매우 가까웠다. 반면 산청집단은 나머지 집단과 형태적으로나 유전적으로 유의한 차이가 나타나는 것으로 보아 산청집단의 별종 가능성이 매우 높음을 시사한다. 앞으로 보다 면밀한 연구로 산청집단의 별종 여부를 명백히 구명하여야 할 것이다.

• The Korean Journal of Zoology
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• v.36 no.4
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• pp.535-544
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• 1993

Sinca early 1930' Colitis taenia striate were introduced to the Donsgjin in Chollabukdo, where it hybridized with an endemic subspecies C. tiutheri. Protein electrophoresis revealed high levels of hybridization with intensive backcrossing occupied approximately 20 kilometers of the river. This is roughly one-half of tech historic range of the endemic species. The average frequency of introduced alleles of three diagnostic loci ranged 0.03-0.46 among 11 sites in tech svrnpatric area. Clinal patterns in allele frequencies suggest C. tiutheri were introduced in an upper reaches of the Dongjin and downstream dispersal of the introduced alleles followed. There is little linkasedisequilibrium between the diagnostic loci, suggesting the nuclear genomes of tech two subspecies are randomly associated. The evidence presented here and previously supports recognition of C. t. striata and C. t. lutheri as the typical subspecies.