• Journal of Marine Life Science
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• v.3 no.1
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• pp.9-21
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• 2018

This study investigated cytogenetic and hematological and histological characteristics between diploid and spontaneous triploid on Cyprinidae (Crucian carp, Carassius auratus; crucian carp, C. cuvieri and common carp, Cyprinus carpio) in four major rivers of Korea. In our results, DNA contents of triploid Cyprinidae were 50% more than those of diploid Cyprinidae. Also, erythrocyte size of triploid Cyprinidae was 50% larger than those of diploid Cyprinidae. In all sampling rivers, sex ratios of C. auratus were biased to female, and especially, triploid groups of C. auratus were all female groups (p<0.05). In principle, sex ratios of C. cuvieri and common carp were equivalent between male and female.

• Animal Systematics, Evolution and Diversity
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• v.6 no.1
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• pp.1-16
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• 1990

The skull and superficial cephalis muscles of Coreoleuciscus splendidus Mori was investigated comparatively with other some fishes of the family Cyprinidae to study on the systematic position of this species. Coreoleuciscs splendidus was unique in the morphology of sphenotic process and the urohyal and this species differ from the true bottom dwellers of the subfamily Gobioninae in the strucutre of cephalic lateral-line canals, the relation of parasphenoids with pterotic and prootic, the morphology of urohyal , basihyal , hypobranchial, and , particulary, the configuration of adductor manibulae complex. With reference to the information so far obtained , the taxonomic position of the present species was discussed in the Cyprinidae.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.40 no.3
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• pp.147-152
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• 2007

Spermiogenesis and mature spermatozoa of the Korean false minnow Pseudogobio esocinus (Cyprinidae) are described by means of scanning and transmission electron microscopy. Spermiogenesis is characterized by lateral development of the flagellum, absence of nuclear rotation, and eccentric nuclear fossa formation. The spermatozoa have a spherical head containing a nucleus with highly condensed chromatin and no acrosome. The nuclear fossa contains the proximal centriole and anterior part of the distal centriole. The midpiece is type A II and contains semi-fused mitochondria around the axoneme. However, the symmetrical distribution of 4 or more the mitochondria does not follow a general pattern of the cyprinid spermatozoa. Cytoplasmic vesicles in the midpiece are common in Cypriniformes and some of Siluriformes and Characiformes spermatozoa.

• The Korean Journal of Zoology
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• v.34 no.4
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• pp.557-570
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• 1991

일차 담수어류의 잉어과(Cyprinidae)에 속하는 Zacco속 어류 4종과 이와 근인관계가 가까운 Candid유속 어류 1종에 대한 유전적 변이를 조사하기 위하여, 한국, 일본 및 대만에서 채집된 개체를 대상으로 전기영동을 실시하여 24-28개의 유전자를 검출 분석하였다. 각 종의 유전적 변이 정도를 조사한 결과 Zaccoplotypus는 전 집단 평균 h: 1.22, p= 17. 52%, HD = 0.053 및 HD= 0.056으로서 조사한 전종중에서일근 변이가 가장 높았다. Z. pachycepholus의 유전적 변이 정도는 A= 1.17, p= 14.8%, HD: 0.026, HG=0.027로서 Z. ploDpus보다 변이 정도가 낮았고, Z. temminck와 Candidia barbata는 각기 A= 1.07, p =7.95%, HD = 0.011, HG = 0.013 및 A= 1.05, P= 3.7%, Hd: 0.013, HG = 0.011로서 변이 정도가 가장 낮았다. Z. Platypus의 경우 한국집단이 변이가 가장 높았으며 대만집단이 가장 낮았다. Zacco속과 Candid지속 어류의 평균 유전적 변이정도는 타어류의 유전적 변이보다 낮았으며 이는 한국산 담수어류중 잉어과 어류의 일반적인 특징이라 사료된다.

• Korean Journal of Ecology and Environment
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• v.52 no.3
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• pp.221-230
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• 2019

Barbel steed (Hemibarbus labeo) is a small freshwater fish species as semi-bottom dwellers distributed in eastern Asia. We carried out characterization of the cytochrome c oxidase subunit I (COI) gene from the mitochondrial DNA of H. labeo in the Sumjin River to identify the phylogenetic location of H. labeo in the genus Hemibarbus and Cyprinidae. Multiple alignment of the 577 bp COI sequence revealed high sequence homology (99~100%) between Seomjin River H. labeo. The nucleotide sequence similarity between H. labeo (HD1) and H. mylodon was 88.91% and that of H. longirostis was 88.81% among the three species found in Korea. In addition, the nucleotide sequence similarities of H. maculatus, H. meditus, H. umbrifer and H. barbus showed 98.97%, 97.20%, 96.87% and 98.85%, respectively. Phylogenetic analysis on seven species of the genus Hemibarbus showed that the H. labeo collected in this study formed two clades. One of which consisted of Hadong, Imsil, Kangjin. The other one formed a step with HD2, HD8 and HD9 of Hadong and the H. labeo reported in Busan, Asan and Seoul, Korea. Phylogenetic position of the H. labeo among Cyprinidae showed 0.143 for the evolutionary distance from Zacco platypus and 0.006 for the H. maculatus. In addition, the genetic position of the H. labeo among 28 species of Cyprinidae was found to be located in Group I, including Gobioninae fishes. The results of this study will provide key genetic information for the taxonomic comparison in Cyprinidae and study of model fish for pollution monitoring in freshwater environments.

• The Korean Journal of Zoology
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• v.34 no.1
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• pp.54-58
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• 1991

감돌고기속 어류에는 2종이 알려져 있으며 이들은 모두 한국고유어종이다. 감돌고기 Pseudopugtungia nigra의 핵형분석 결과 diploid chromosome number는 50이었으며, 7쌍의 metacentric, 18쌍의 $_{submeta}$telocentric chromosome으로 구성되어져 잇었다. 가는 돌고기 P. tenuicorpus의 2N은 50이었으며 10쌍의 metacentric, 15쌍의 $_{submeta}$telocentric chromosome으로 구성되어져 있었다.

• Applied Microscopy
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• v.28 no.2
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• pp.237-253
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• 1998

The structures of the fertilizedegg envelope in threespecies of cyprinidae, leoparddanio (Brachydanio frankei), cherry barb (Barbustitteya) and white cloudmountain fish (Tanichthys albonubes) were investigated by light and electron microscopy. The fertilized eggs of all three species have colorless, transparent, spherical and non-floted type. The egg envelopes have a single micropylewhich is thought to the pathway of sperm in the area of the animal pole. Also, an outer layersof both cherry barband white cloud mountain fish areadhesive types, but in that of leoparddanio has non-adhesivetype. In leopard danio, an outer surface ofegg envelope is covered by mushroom-likestructure, that of cherry barb is arranged by button-like structure, and that of white cloud mountain fish isarranged by rod-likestructure. Inboth leopard danioand cherrybarb, the eggenvelopes consist of three distinct layers; an outer layer, a middle layer and an inner layer, and that of white cloud mountain fish hastwo layers. An innerlayer of egg envelopein leopard danio consist of 10 layers, cherry barb has 8 layers, and white cloud mountain fish has $5\sim6$ layers.

• Journal of the korean society of oceanography
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• v.32 no.4
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• pp.202-207
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• 1997

Species composition and abundance of fish larvae were studied from May 1988 through August 1989 in the Han River Estuary and adjacent Kyunggi Bay, Korea. Of 23 taxa identified, Coilia nasus, llisha elongata, and Cyprinidae spp. were dominated. Maximum density (3,5771/1,000m)$^3$ occurred in August 1988 and minimum (3/1,m$^3$) in February 1989. O1igo- ormesohaline species dominated during ebb tides while polyhaline species during flood tides. Correspondence analysis revealed that three distinctive species groups; oligohaline species, Coilia nasus, Ilisha elongata and Cyprinidae spp., which dominated at both channels of Kwanghwa Island (stations 1, 2), mesohaline species, Sardinella zunasi and Gobiidae spp., at the mouth of Yeomha Channel (station 3), and polyhaline species, Engraulis japonicus and Syngnathus schlegeli, in the middle of Kyunggi Bay (station 4). Coilia nasus was the most abundant species and reported first time in the study area. Given the species composition and density of fish larvae, the Han River Estuary is considered to be a major spawning and nursery ground for brackish water species such as Coilia nasus, Ilisha elongata and some Cyprinidae spp.

• Korean Journal of Ichthyology
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• v.31 no.1
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• pp.1-6
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• 2019

The spermatozoa of Hemiculter eigenmanni is similar to other cyprinid by spherical head containing a nucleus with highly condensed chromatin, a short midpiece with mitochondria and a flagellum located tangentially to the head. The fine structure of cyprinid spermatozoa described classical characteristics of Cyprinidae spermatozoon comprising the absent of acrosome, the shallow nucleal fossa, postnuclear distribution of mitochondria and the lateral insertion of flagellum. However there were some structural differences for their morphology, in the mitochondria and the orientation of centrioles. The proxomal and distal centrioles are oriented approximately $145^{\circ}$ to each other. The mitochondria of 8 or 10 in number are arranged in two or three layers.

• Journal of Aquaculture
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• v.20 no.2
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• pp.140-143
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• 2007

Cytogenetic analyses of an endemic species, Coreoleuciscus splendidus (Cyprinidae) was performed including erythrocyte measurement, chromosome count and karyotyping, nucleolar organizing region (NOR) banding and flow cytometric analysis of genome size. C. splendidus had the same modal chromosome number of 2n = 48 between sexes, however, displayed a sex-related dimorphism in their chromosome karyotypes. Males represented a pair of heteromorphic chromosomes which couldn‘t be seen in any female individuals, indicating that the sex determination mechanism of this species should be a typical XX-XY based male heterogamety (female=10M+6SM+8A+XX vs male=10M+6SM+8A+XY). Other cytogenetic features such as Ag-NORs located in a pair of acrocentric chromosomes, estimated nuclear volume ($28{\mu}m^3$) and cellular DNA content (2.4 pg/cell) suggest that genetic recombination might be the main driving force responsible for the evolution of this species rather than the polyploidy-based evolutionary process as in many other Cyprinidae species.