• Korean Journal of Ichthyology
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• v.20 no.1
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• pp.7-12
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• 2008

Study on spermatid and spermatozoon of a Korean endemic freshwater fish, Microphysogobio yaluensis, has been carried out by transmission electron microscope. Spermiogenesis involves conspicuous modifications intercelluar movement such as centrioles and mitochondria migration, nuclear depression and structural changes for instance chroatin condensation, excess of cytoplasm. The mature spermatozoa are similar to those of other cyprinids as follows: a spherical nucleus with a shallow nuclear fossa, a short midpiece containing several mitochondria and encircling the basal body of the flagellum. However there are some differences in the orientation of the centrioles,the number of the mitochondria and distribution of vesicles from other cyprinids. It could be concluded that the M. yaluensis spermiogenesis belongs to type 2, and its mature spermatozoon is charaterized by a unique feature which may provide a useful systematic character.

• The Korean Journal of Zoology
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• v.34 no.4
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• pp.571-584
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• 1991

잉어과(Gyprinidae)의 Zocco속 어류 4종과 Candidia속 어류 1종에 대한 종간 유연관계와 종분화 연대측정 및 이들의 지질학적 분포경로를 밝히기 위하여 한국, 일본 및 대만에서 채집된 개체를 대상으로 전기영동법에 의한 유전자 분석을 하였다. 각 종의 지역별(한국, 일본, 대만) 집단간 유전적 유연관계를 분석한 결과 평균 유전적 근연치는 90% 이상이었다. Z. temmincki의 경우 일본집 단들은 한국의 A-type 집단과는 유연관계가 가까왔으나 한국의 B-type과는 유전적 차이가 현저하러다. Z. PlaD여5의 경우 한국집단과 일본집단사이의 유연관계는 S = 0.852였고, 한국집단과 대만집단 사이는 5 = 0.672, 일본집단과 대만집단 사이는 S = 0.751로서 지리적으로 현저한 차이를 업였다. Z. pochycephalus 3개 집단간의 유전적 근인치는 S = 0.963이었고 Candidia borbota 2개 집단간은 S = 0.946이었다. 종간의 유전적 근연환계를 비교한 결과 Candidia borbota와 Z. temmincki사이는 S = 0.608, Z. pluDpus와 1. pachycephalus사이는 S = 0.612였으나, Z. temmincki와 Z. platypus사이는 S = 0.441, Z. temmincki 와 Z. pochycepholus 사이는 S = 0.350이었고, Z. plotpus와 Condfda barbata사이는 S = 0.328로서 이들 사이에는 현저한 유전적 차이가 있었다. 각 종간의 롱분화 연대를 추산한 결과 이들은 약 480만년 전인 Pliocene 초기에 공통 조상종에서 분화하여 Z. temmincki, Candidia borbato group과 Z. plotypus, Z. pochycepholus group으로 분리되었고 약 260만년 전인 Pliocene 후기에 Z. temminc소와 Candidia borbota로 분화되었다고 추산되며 약 80만년 전인 Pleistocene시기에 남 temmincki B-type에서 h-type이 분화되었다짙 여겨진다. 한편 또 다른 한 단opP은 약 230만년 전인 열iocene후기에 대만 지역의 Z. plotypas에서 Z. pochvcepholus가 분화된 후 현재에 이르렀다고 추정된다. Z. platypus는 약150만년 이전인 초기 Pleistocene시기에 대만지역에서 한국 및 일본집단으로 분리되었다고 보며 이들 한국집단과 일본집단은 약 50만년 전 Pleistocene의 Middle기에 고황하 수계를 거쳐 현재의 분포 상황에 이르렀다고 여겨진다. 한편 대. temmin체과의 B-type에서 저온 적응으로 분화되었다고 추측되는 A-type은 약 20만년 전인 Pleistocene의 Riss기에 역시 고황하 수계를 통하여 한국과 일본으로 분포하여 현재에 이르렀다고 사료된다.

• The Korean Journal of Zoology
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• v.34 no.4
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• pp.500-525
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• 1991

1986년부터 1991년까지 우리나라 연안에서 채집된 베도라치아목 Blennioidei과 등가시치아목 Zoareoidei의 어류 표본을 대상으로 분류학적으로 재검토하였다. 베도라치아목 어류는 먹베도라치과 Tripterygiidae의 가막베도라치 Enneoptewgius etheostomus(Jordan et Snyder) , 비늘 베도라친과 Labrisomidae의 비늘베도라치 감eoclinus bwope(4ordan et Snyder) , 그리고 청 베도라치과 B1enniidae의 청베도라치 Pictiblennius yotobei(Jordan et Snyder), 저울베도라치Entomacrodus stellifer lighti(Herre), 대강베도라치 Istibfennius enosimae(Jordan et Snyder), 앞동갈베도라치 Omobranchus elrgons(Steindachner), 골베도라치 O. punctatus (Valenciennes) 및 두줄베도라치 Petroscines breuiceps(Valenciennes)의 7속 8종으로 분류되었다. 이 가운데 N. bwope의 표본은 우리나라에서는 본 조사기간 중 제주도 연안에서 처음으로 확인되어 한국 미기록종으로 보고한다. 한편 등가시치아목의 어류는 등가시치란 Zoarcidae의 벌레문치 Lycodes tanakoi Jordan et Thompson, 먹갈치 Lycodes nakamurai Tanaka, 등가시치 Zoarces gilrii Jordan et Starts, 실베도라치 Zoarchias aculeatus( Basilewsky), 우베도라치 Zoarchias uchidai Matsubara, 민베도라치 Zoarchias glaber Tanaka, 얼룩가시치 Neozoarces pulcher Steindachner, 칠성갈치 Petroschmidtia toyamensis Katayama, 자갈치 Gvmnelopsis brashnikoui Soldatov, 문자갈치 Dauidijordania poecilimon(Jordan et Fowler) 및 청자갈치 Allolepis hollandi Jordan et Hubbs, 장갱이란 Stichaeidae의 세줄베도라치 식nogrammus hewagrammus(Temminck et Schlegel), 장갱이 Stichaeus grigorjemi Her\ulcornerenstein, 왜도라치 Chri'olophis wui(Wang et Wang ) , 괴도라치 Chirolophis joponicus(Jordan et snyder) , 벼슬베도라치 각ectrias benjamini Jordan et Snyder, 가시베도라치 Lumpenella nigricons Matsubara, 육점날개 Ophistocentws zonope jordan et Snyder, 그물베도라치 Dictyosoma burgeri Van der Hoeven 및 황점 베도라치Dictyosoma wbrimaculata Yatsu, Yasuda et Taki, 그리고 황줄베도라치란 Pholididae의 황줄베도라치 Phoris taczanowskii(Steindachner), 오색베도라치 Phoris omotus (Girad), 베도라치 Pholis nebuloso(Temminck et Schlegel), 횐베도라치 Pholisfangi(Wang et Wang) 및 점베도라치 Pholis crossispino(Temminck et Schlegel)의 17속 25종이 분류되었다. 이중에서 Zoarchias glaber, Chirofophis oui, Alectrias benjamini, Dictyosoma mbrimaculamia 및 Pholis crassispina의 5종은 한국 미기록종으로 보고한다. 아울러 이들 미기록종을 포함한 한국산 베도라치아목과 등가시치아목 어류의 속 .종 검색선 와 종별 사진을 제시하고, 이들 표본을 근거로 하여 형태적 특징, 계수계측치, 채집지 및 서식처를 기록하였으며, 이들의 분류학적 위치에 대해 논의하였다. 우리나라에 출현하는 베도라치아권의 어류는 거의 대부분이 제주도 연안과 서남해 연안에 제한분포하는데, 등가시치아목의 어류는 주로 동해연안에서 많은 종이 출현하고 있어서 동물지리학적으로 주목된 다.

• The Korean Journal of Zoology
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• v.37 no.1
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• pp.49-57
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• 1994

In the course of an investigation on the morphological variation of Korean striped bittering, Acheilognathus vamatsutae Mori, two kinds of morrholoflical types were found. Some morphological characters were compared between them and multivariate analysis was conducted. Since the difference of the barbel length between them was very significant (p < 0.01,1-test), they should be designated as L-and 5-type Hshes: fishes with long barbels and those with should barbels, respectively. Lateral line scales, snout length and prepectoral length showed a tendency that the observation could be distinguished from each other (p < 0.05, Duncan's multiple range tests. There were no individuals over 70 mm BL in S-type and so S-type fishes were somewhat dwarf than L-type fishes. The two types were also clearly distinguished by multivariate analyses using cluster and discriminant analyses. According to the observation on the four populations of the Naktong River, the blue-green stripe on the body side and the white band on the margin of anal fin in males of S-type fishes were well developed through the year but those of males of L-type fishes completely disappeared or became slender during nonbreedins season as that of females. Of the seven localities surveved, there were no places that the two types cohabit. S-type fishes are limited only in the Kumho and Wichon River of the Naktong River system but L-type fishes are distributed more widely In the Hongchon, Mangvons, Somjin, Mirang and Panbyon River.

• Animal cells and systems
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• v.14 no.2
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• pp.137-145
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• 2010

Four specimens of unknown Coilia sp. were collected for the first time from the Yellow Sea in 2008 and compared with Coilia mystus and Coilia nasus. Coilia sp. showed similar morphology to C. mystus and C. nasus, but differed in that its tail was considerably shorter. We conducted an analysis of the morphological and genetic characteristics in an effort to clarify the taxonomic position of Coilia sp. In counts and measurements, Coilia sp. were well distinguished from C. nasus by the number of scutes (42-44 in Coilia sp. vs. 40-45 in C. mystus vs. 45-55 in C. nasus), ratio of dorsal base length to head length (43.4-47.6 vs. 37.9-47.6 vs. 33.0-41.0), and eye length to head length (19.2-20.8 vs. 17.0-22.4 vs. 13.8-18.2). In caudal skeleton of Coilia sp., urostyle, hypural and epural bones were not observed; instead of them, caudal fin rays were supported by the last vertebra, neural and haemal spines' extension. The molecular phylogenetic relationship was analyzed using 414 base-pair 12S rRNA mitochondrial DNA sequences. The Kimura-2-parameter distance between Coilia sp. and C. mystus was 0.3%, but was 1.3% between Coilia sp. and C. nasus. Both the neighbor-joining tree and maximum-likelihood tree showed that Coilia sp. are closely clustered with C. mystus. Therefore, our results suggest that the Coilia sp. may be a deformed fish of C. mystus.

• Korean Journal of Ichthyology
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• v.18 no.3
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• pp.163-169
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• 2006

The Korean ricefish, Oryzias, consisted of 2 species, O. latipes and O. sinensis. Through investigation on their distributions, it was confirmed that O. sinensis was restricted to western areas, and O. latipes was distributed throughout Korea. Interestingly, Daecheon region near the West Sea was sympatric, existing O. latipes and O. sinensis. In addition to their distributions, O. latipes was well distinguished from O. sinensis as the following morphological characteristics: mean 31 vertebrae (vs. 30), mean 15 gill rakers (vs. 12), lots of dots in both sides of body (vs. absent), and yellowish ventral and anal fins (vs. blackish).

• Korean Journal of Ichthyology
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• v.6 no.2
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• pp.160-171
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• 1994

The lateral line scales of the Labridae fish are ellipse, pentagoanl, or hexagonal, but most of them are the hexagonal type. Those of Ciarrhilabrus temminckii, ellipse, Xyrichtys dea, Choerodon azurio, Semicossyphus reticulatus and Bodianus oxycephalus are pentagonal. The most complex species are Choerodon azurio which is pentagonal, but similar tohexagonal, and Pteragogus flagellifera which is hexagonal, but similar to pentagonal type. The sizes of sensory tubes for the Labroides dimidiatus and Cheilio inermis were larger than the other group and Xyrichtys dea had most narrow one. These varied sizes of sensory tube indicate that development of sensory tube is deeply connected with inhabitation.

• Korean Journal of Ichthyology
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• v.6 no.2
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• pp.99-131
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• 1994

The taxonomic revision of the flounders of the suborder Pleuronectoidei was made based on the specimens collected from the coasts of the Korean Peninsula from 1989 to 1993. The flounders of Korea are composed 34 species belonging to 24 genera and 4 families, and the keys to species, genera and families are provided with redescriptions and distributions. Three species of the flounders are found to be new to Korea : Tarphops oligolepis (Bleeker) of the family Paralichthyidae, Parabothus kiensis (Tanaka) of the family Bothidae and Pleuronectes pallasii Steindachner of the family Pleuronectidae. Laeops lanceolata, previously recorded in the Korean fish list, was found to be synonym of L. kitaharai. The fishes of the families Paralichthyidae and Bothidae were distributed in the Yellow Sea and the southern coast of Korea, while most of the flounder species of the family Pleuronectidae except Limanda yokohamae, Eopsetta grigorjewi, and Pleuronichthys cornutus were found along the eastern coast of Korea. It appears that Korean flounders are similar to those of Chinese and Japanese faunas which include tropical and temperate species without endemics.

• Korean Journal of Ichthyology
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• v.23 no.2
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• pp.128-134
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• 2011

The feeding habits of scorpion fish, Sebastiscus marmoratus, were studied using 324 specimens collected in the coastal waters of Tongyeong, from January to December, 2009. The size of the specimens ranged from 9.8 to 30.1 cm in standard length (SL). S. marmoratusis was a piscivore that consumed mainly teleosts such as Engraulis japonicus, Clupea pallasi and gobid fishes. Of the fish species Engraulis japonicus was the most preferred prey. Its diet also includes shrimps and crabs. Hermit crabs, polychaetes, bivalves and euphausia were minor preys. Smaller individuals (<13 cm SL) fed mainly on shrimps, crabs and fishes. The proportion of shrimps and crabs decreased as body size increased, whereas the consumption of fishes gradually increased. Fishes accounted for almost stomach contents of larger individuals (more than 19 cm SL). Seasonal changes in the S. marmoratusis diet were significant. Fishes was most common prey during summer, autumn and winter, whereas crabs and shrimps were mainly consumed during spring.

• Korean Journal of Ichthyology
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• v.21 no.1
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• pp.15-22
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• 2009

An artificial breeding method was carried out to investigate development of eggs and the early life history of Iksookimia longicorpa. The eggs of the female were obtained by injecting gonadotropin (LHRH) and fertilizingby the dry method in the laboratory. The mature eggs were separate, demersal, light yellowish, and averaged $1.53{\pm}0.07mm$ in diameter. In water temperature of $23{\sim}25^{\circ}C$, the eggs hatched in 50~72 hours after fertilization, and their lengths reached $5.1{\pm}0.23mm$ in total length. On Day 4 after hatching, they averaged $7.1{\pm}0.47mm$ in total length and their yolk sacs were completely absorbed. From 25 days after hatching, they attained a juvenile stage reaching $12.8{\pm}0.49mm$ in total length. On the 100th dayafter hatching, their band patterns and external form were similar to those of adults, and they averaged $38.5{\pm}2.95mm$ in total length.