• Title/Summary/Keyword: Caudal fin

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First Record of the Cutlass Fishes, Benthodesmus tenuis (Perciformes: Trichiuridae) from Korea (한국산 갈치과 어류 1 미기록종, Benthodesmus tenuis)

  • Kim, Maeng Jin;Choi, Jung Hwa;Oh, Tag Yun;Kim, Jung Yun;Lee, Dong Woo
    • Korean Journal of Ichthyology
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    • v.24 no.4
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    • pp.302-305
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    • 2012
  • Two specimens (332.0~377.6 mm in standard length) of Benthodesmus tenuis (G$\ddot{u}$nther), belonging to the family Trichiuridae, firstly collected in off Heuksan-do and Yeosu, Jeollanam-do by the bottom trawl. This species was characterized by the following morphological traits: 125~126 dorsal fin rays (vs. 144~155 for B. pacificus), I, 73 anal fin rays (vs. 91~101), interorbital region flat (vs. interorbital region with prominent crest for A. anzac), opercular black and caudal fin forked. We propose a new Korean name, "Se-jang-gal-chi-sok" and "Se-jang-gal-chi" for the genus and species, respectively.

A Taxonomic Revision of the Family Bagridae (Pisces, Siluriformes) from Korea (한국산 동자개과 어류의 분류학적 재검토)

  • Lee, Chung-Lyul;Kim, Ik-Soo
    • Korean Journal of Ichthyology
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    • v.2 no.2
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    • pp.117-137
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    • 1990
  • The morphological characters of the family Bagridae living in the river systems flowing into the south and western seas of Korea were reviewed and a taxonomic revision was made. The family Bagridae was classified into two genera: Pseudobagrus and Leiocassis. Species corresponding to genus Pseudobagrus were P. fulvidraco, P. koreanus Uchida, sp. nov., P. brevicorpus, and genus Leiocassis were L. nitidus, L. ussuriensis, and L. longirostris. Among them Pseudobagrus koreanus Uchida, sp. nov. and P. brevicorpus are endemic species of Korea. As the intergeneric taxonomic characters, the outstanding morphological differences between genera Pseudobagrus and Leiocassis were distinguished in following characters; the serrated structure of pectoral spine, the length of barbels, the number of pectoral fin rays, the structure of cranial lateral line system and the fused state of 3-4 hypurals. Pelteobagrus fulvidraco and Coreobagrus brevicorpus recorded previously in Korea were classified as Pseudobagrus fulvidraco and P. brevicorpus, respectively. Pelteobagrus nitidus and Pseudobagrus ussuriensis are also changed to genus Leiocassis. The characters of interspecific classification belonging to genera Pseudobagrus and Leiocasis were the shape of caudal fin, the form of body, the length of body, the number of anal fin ray and the number of gill rakers. Pseudobagrus sp. was named into Pseudobagrus koreanus Uchida, sp. nov..

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First Record of Two Perciform Fishes, Chelidoperca pleurospilus (Serranidae) and Parapercis muronis (Pinguipedidae) from Korea (한국산 농어목 어류 2 미기록종, Chelidoperca pleurospilus 및 Parapercis muronis)

  • Park, Jeong-Ho;Kim, Jin Koo;Choi, Jung Hwa;Chang, Dae Soo;Park, Jong Hwa
    • Korean Journal of Ichthyology
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    • v.19 no.3
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    • pp.246-252
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    • 2007
  • Two specimens (56.3~61.1 mm SL) of the serranid fish, Chelidoperca pleurospilus and 21 specimens (34.0~93.6 mm SL) of the pinguipedid fish, Parapercis muronis were collected around Jeju Island, southern Korea. C. pleurospilus is characterized by having five dark blotches along lateral line, truncated caudal fin, and scaleless interorbital space. P. muronis is characterized by having five oblique dark bands on body side, five spines on dorsal fin, and no notch between spinous and soft-rayed portions of dorsal fin. We describe these specimens as the first record from Korea, and propose the new Korean name, "Byeol-gak-si-dom" for the former and "Da-seosjul-yang-dong-mi-ri" for the latter.

The comparison between Pleuronichthys cornutus and Pleuronichthys japonicus for the activation of fishery marine tourism (수산관광 활성화를 위한 도다리와 흘림도다리의 비교)

  • Shin, Lim-Soo
    • Journal of Digital Convergence
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    • v.19 no.8
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    • pp.43-48
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    • 2021
  • There are prior studies that describe in detail the classification and shape of 26 species of Korean flounder, but it is difficult to make them out and they are used interchangeably or misused. It is intended to present the taxonomic standards of Pleuronichthys cornutus and Pleuronichthys japonicus and use them as tourism education materials using aquatic resources. Morphological comparison was made through counting and measurement. The two fish species were generally flattened in an oval shape with a low body height and a wide body width, and the anal fin developed and sized similar to the dorsal fin, and the caudal fin was widely spread out. Among the hyoid bones, in three parts of the coccyx, the main part, the ischial part, and the cardinal process, there were differences in the degree of curvature, the open angle, and the shape of the ischial part and the lateral process, which corresponded to the representative classification characteristics. In addition, it will be expected that it will serve as a basis as a fishery and marine education material for marine tourism that classifies and categorizes the characteristics as a genus of flounder and categorizes the characteristics, and reduces misuse of scientific names and names in the future.

Morphological Development of Eggs, Larvae and Juveniles of the Sarcocheilichthys variegatus wakiyae in Yeongsangang River, Korea (영산강에 서식하는 참중고기 Sarcocheilichthys variegatus wakiyae의 난발생 및 자치어 형태발달)

  • Park, Jae-Min;Han, Kyeong-Ho
    • Korean Journal of Ichthyology
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    • v.34 no.1
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    • pp.16-24
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    • 2022
  • The eggs development and early life history of Sarcocheilichthys variegatus wakiyae was investigated. The adult fishes were collected in Yeongsangang River, Damyang-gun, Jeollanam-do, Korea, and their spawning inducement was carried by sex maturation hormone (Ovaprim) injections. Spawning amount was mean 31±3.5 Mature eggs were cicular in shape and mean 2.40±0.05 mm in diameter. Hatching period of the embryo was 230 to 240 hours after fertilization under water temperature of 22℃. The newly hatched larvae were 10.7±0.19 mm in total length (TL). 3 days after hatching, postlarvae was measured 12.0±0.13 mm in TL and the tip of the caudal fin was bent at 45°. 11 days after hatching, it was measured 14.6±0.13 mm in TL, and transferred to juvenile as the number of fins (iii7 dorsal fin, iii6 anal fin, i7 ventral fins) reached a constant number of each part.

Development of Larvae and Juveniles and Growth Characteristics of the Sebastes taczanowskii (탁자볼락(Sebastes taczanowskii) 자치어의 형태발달 및 성장특성)

  • Seong-Jun Moon;Jin-Gak Kim;Yoon-Ha Kim;Ye-Sol Kwon;Seong-Min Yoon;Jae-Min Park
    • Korean Journal of Ichthyology
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    • v.35 no.1
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    • pp.1-9
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    • 2023
  • The morphological development of larvae and juvenile of Sebastes taczanowskii were studied. The S. taczanowskii were caught at Goseong-gun, Gangwon-do from March in 2016. Larvae beared at water temperature of 11~12℃ (mean 11.5±0.5℃). The just beared larvae were 5.25~5.96 mm (mean 5.60±0.19 mm, n=30) in total length and their mouth and anus were already opened. They began to eat rotifer and transformed to postlarvae stage. 35 days after bearing postlarvae was measured 7.16~11.4 mm (mean 9.02±1.00 mm) in total length and the tip of notochord was bent upward. 48 days after bearing juvenile was measured 9.45~18.7 mm (mean 14.4±1.75 mm) in total length with dorsal fin rays XIII, 13~15; anal fin rays III, 6~8; caudal fin rays 16.

Redescription of the Glasseye Snapper Heteropriacanthus cruentatus (Perciformes: Priacanthidae) from the coastal waters of Jeju Island, Korea (제주도 연안에서 채집된 뿔돔과(Priacanthidae) 큰눈홍치 Heteropriacanthus cruentatus (Perciformes: Priacanthidae)의 재기재)

  • Choi, Youn;Lee, Heung-Heon
    • Korean Journal of Ichthyology
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    • v.22 no.2
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    • pp.126-128
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    • 2010
  • Morphological characters of Heteropriacanthus cruentatus are redescribed in detail based on a single specimen (179.3 mm SL) collected from the coastal waters of Jeju Island, Korea. The species is characterized by dark brown spots scattered on the caudal fin and the soft-rayed portions of the dorsal and anal fins, and 59 pored lateral line scales.

New record of the snake eel Ophichthus asakusae (Ophichthidae: Anguilliformes) from Korea

  • Kim, Byung-Jik;Choi, Jung-Hwa;Chang, Dae-Soo;Cha, Hyung-Kee;Park, Jong-Hwa
    • Fisheries and Aquatic Sciences
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    • v.12 no.3
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    • pp.236-239
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    • 2009
  • We describe Ophichthus asakusae from Korea based on a single specimen (426.0 mm TL) collected from the southern sea off Jeju Island. The species is characterized by a pointed, hard, sponge-like tail tip without a caudal fin and 126-132 total vertebrae. We propose a new Korean name, "Je-ju-ba-da-baem" for the species.

First Record of the Cook's cardinalfish, Apogon cookii (Apogonidae, Perciformes) from Korea (독도연안에서 채집된 한국미기록 어종 다섯줄얼게비늘 (국명신칭, 동갈돔과) Apogon cookii에 대하여)

  • Myoung, Jung-Goo;Cho, Sun-Hyung;Park, Jeong-Ho;Kim, Jong Man
    • Korean Journal of Ichthyology
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    • v.18 no.2
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    • pp.148-150
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    • 2006
  • Two specimens of Apogon cookii of the family Apogonidae were collected from the coastal waters of Dokdo, Korea, and described as the first record from Korea. Specimens were caught by SCUBA diving using scoop net (length 33 cm, depth 63 cm) on October, 1997. The species differs from A. endekataenia in having 5 longitudinal stripes and a small black spot on the base of caudal fin. The new Korean name, "Da-seot-jul-eol-ge-bi-neul" as new Korean name of Apogon cookii.

First Occurrence of Chromis albicauda (Pomacentridae, Perciformes) from Jeju Island, and Re-assignment of Yellow Chromis Specimens from Korea

  • Song, Young Sun;Kim, Jin-Koo;Kim, Byung-Jik
    • Animal Systematics, Evolution and Diversity
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    • v.29 no.3
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    • pp.253-258
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    • 2013
  • Two specimens of Chromis albicauda were collected from Jeju Island, Korea. The species is most similar to C. analis, but is distinguishable by the presence of a white caudal fin when alive, 4-5 scale rows on the anterior portion of the preorbital, and a blackish blotch around anal opening. The results of a molecular analysis based on mitochondrial DNA 16S rRNA sequences confirm that the two individuals are not C. analis but C. albicauda as the genetic distance between the two species is 0.044. A comparison of the two individuals of C. albicauda with yellow chromis shows that none of the previously reported yellow chromis is C. analis, but rather they are C. albicauda. Herein, we suggest the new Korean name "Huin-ggo-ri-no-rang-ja-ri-dom" for C. albicauda.