• Title/Summary/Keyword: Pleuronectidae

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Taxonomic Revision of the Flounders (Pisces : Pleuronectiformes) from Korea (한국산 가자미아목 어류의 분류학적 연구)

  • Kim, Ik-Soo;Youn, Chang-Ho
    • 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.

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Identification of eleven species of the Pleuronectidae family using DNA-based techniques

  • Eun-Mi Kim;Mi Nan Lee;Chun-Mae Dong;Eun Soo Noh;Young-Ok Kim
    • Fisheries and Aquatic Sciences
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    • v.26 no.11
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    • pp.678-688
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    • 2023
  • Flatfish are one of the largest families in the order Pleuronectiformes and are economically important edible marine fish species. However, they have similar morphological characteristics leading to challenges in classifying correctly, which may result in mislabeling and illegal sales, such as fraudulent labeling of processed food. Therefore, accurate identification is important to ensure the quality and safety of domestic markets in Korea. Species-specific primers were prepared from the mainly consumed eleven species of the order Pleuronectiformes. To rapidly identify the 11 flatfish species, a highly efficient, rapid, multiplex polymerase chain reaction (PCR) with species-specific primers was developed. Species-specific primer sets were designed for the mitochondrial DNA cytochrome c oxidase subunit I gene. Species-specific multiplex PCR (MSS-PCR) either specifically amplified a PCR product of a unique size or failed. This MSS-PCR analysis is easy to perform and yields reliable results in less time than the previous Sanger sequencing methods. This technique could be a powerful tool for the identification of the 11 species b the family Pleuronectidae and can contribute to the prevention of falsified labeling and protection of consumer rights.

Pleuronichthys sp. Fossils (Pleuronectidae) from the Duho Formation, Pohang Uhyeon-dong in Korea (포항시 우현동 두호층에서 산출된 Pleuronichthys sp. 화석)

  • Ko, Ju-Yeong;Nam, Kye-Soo
    • Journal of the Korean earth science society
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    • v.37 no.3
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    • pp.133-142
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    • 2016
  • Two specimens of the Cenozoic fish fossils were discovered from the Miocene Duho Formation of Uhyeon-dong, Pohang, Korea. These fossils are identified as Pleuronichthys sp. based on the following- firstly, front dorsal fin rays elongated to the upper part of neurocranium, Secondly, right sided orbit of neurocranium, Thirdly, presence of urohyal like fish-hook, Fourthly, curved sciatic part of the urohyal, Fifthly, presence of postcleithrum, Sixthly, over 27 centrum, Seventhly, elongated first pterygiophore of the anal fin rays, Eightly, c-shaped inner side of urohyal, Ninthly, small or few cardiac apophysis, and Tenthly, presence of many spots on body. These fossils of Pleuronichthys represent the first record in East-Asia. Two specimens are anatomically different in the extent of the asymmetry and the flatness of skull. This represents the unique ontogeny stage of the Pleuronectidae, because they accompany the above anatomical difference when they transform from pelagic lifestyle to benthic lifestyle.

Molecular identification and morphological description of larvae for ten species of the family Pleuronectidae (Pleuronectiformes, PISCES) from Korea (한국산 가자미과(가자미목, 어상강) 자어 10종의 분자동정 및 형태기재)

  • Lee, Soo Jeong;KIM, Jin-Koo;RYU, Jung-Hwa;YU, Hyo Jae;JI, Hwan-Sung;IM, Yang Jae
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.55 no.4
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    • pp.335-348
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    • 2019
  • We found ten species of larvae belonging to the family Pleuronectidae as a result of analysis on ichthyoplankton collected monthly from the East Sea, Yellow Sea, Korea Strait and East China Sea between February 2016 and May 2018 using bongo net. The ten species of pleuronectid larvae were divided into three groups in morphology. Group A had three or four bars on the lateral side of the tail: Glyptocephalus stelleri, G. kitaharae, Pseudopleuronectes yokohamae, and Hippoglossoides dubius. Group B had a row of melanophores along the dorsal and ventral side of tail: Cleisthenes pinetorum, Eopsetta grigorjewi, Dexistes rikuzenius, and Platichthys bicoloratus. Group C had dense melanophores which are covering trunk and tail entirely except caudal peduncle: Platichthys cornutus and Platichthys japonicus. The three groups did not associate with previous molecular phylogenetic studies except for the G. stelleri and G. kitaharae of the group A.

문치가자미 (Limanda yokohamae)의 난발생에 미치는 수온의 영향

  • 나종헌;김진구;김용억
    • Proceedings of the Korean Society of Fisheries Technology Conference
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    • 2000.05a
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    • pp.477-478
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    • 2000
  • 가자미과 (Pleuronectidae)에 속하는 문치가자미 (Limanda yokohamae)는 우리나라, 일본, 대만, 중국 등지에 분포하며 동일 속의 4종과 달리 우리나라 남.서해안에서만 서식하고 (김과 윤, 1994), 우리나라 서해안에서는 북위 37$^{\circ}$를 경계로 하계 및 동계 분포가 뚜렷하게 구분되는 계절회유성 어종으로 알려져 있다(김 등, 1994). (중략)

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Ultrastructural Studies of Germ Cell Development and the Functions of Leydig Cells and Sertoli Cells associated with Spermatogenesis in Kareius bicoloratus (Teleostei, Pleuronectiformes, Pleuronectidae)

  • Kang, Hee-Woong;Kim, Sung Hwan;Chung, Jae Seung
    • Development and Reproduction
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    • v.20 no.1
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    • pp.11-22
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    • 2016
  • The ultrastructures of germ cells and the functions of Leydig cells and Sertoli cells during spermatogenesis in male Kareius bicoloratus (Pleuronectidae) were investigated by electron microscope observation. Each of the well-developed Leydig cells during active maturation division and before spermiation contained an ovoid vesicular nucleus, a number of smooth endoplasmic reticula, well-developed tubular or vesicular mitochondrial cristae, and several lipid droplets in the cytoplasm. It is assumed that Leydig cells are typical steroidogenic cells showing cytological characteristics associated with male steroidogenesis. No cyclic structural changes in the Leydig cells were observed through the year. However, although no clear evidence of steroidogenesis or of any transfer of nutrients from the Sertoli cells to spermatogenic cells was observed, cyclic structural changes in the Sertoli cells were observed over the year. During the period of undischarged germ cell degeneration after spermiation, the Sertoli cells evidenced a lysosomal system associated with phagocytic function in the seminiferous lobules. In this study, the Sertoli cells function in phagocytosis and the resorption of products originating from degenerating spermatids and spermatozoa after spermiation. The spermatozoon lacks an acrosome, as have been shown in all teleost fish spermatozoa. The flagellum or sperm tail of this species evidences the typical 9+2 array of microtubules.

First Occurrence of a Pleuronectid Atheresthes evermanni (Pleuronectiformes) from the Middle East Sea, Korea (한국 동해 중부 해역에서 채집된 가자미과(Pleuronectidae) 어류 첫기록종, Atheresthes evermanni)

  • Park, Jeong-Ho;Jang, Yo-Soon;Kim, Jin-Koo
    • Korean Journal of Ichthyology
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    • v.32 no.4
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    • pp.245-250
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    • 2020
  • Two specimens (407~438 mm in standard length) of a pleuronectid Atheresthes evermanni were collected by a gill-net from the coastal waters off Goseong-gun, middle East Sea of Korea. These specimens are characterized by a large mouth, narrow interorbital space, invisible eye at blind side, long and slender gill rakers, emarginated caudal fin, and almost straight lateral line. This is the first record of A. evermanni in Korean waters; we therefore add it to the Korean fish fauna and propose new Korean name, "Hwa-sal-chi-ga-ja-mi-sog" for the genus and "Hwa-sal-chi-ga-ja-mi" for the species, respectively.

Comparative Morphology of Tanakius kitaharae and Glyptocephalus stelleri (Pleuronectidae) Larvae (갈가자미, Tanakius kitaharae와 기름가자미, Glyptocephalus stelleri (가자미과) 자어의 형태 비교)

  • Jang, Seo-Ha;Jung, Kyung-mi;Park, Jeong-Ho;Kim, Jin-Koo
    • Korean Journal of Ichthyology
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    • v.28 no.3
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    • pp.164-174
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    • 2016
  • Tanakius kitaharae and Glyptocephalus stelleri, belonging to the family Pleuronectidae, were very similar in external morphology not only during adult periods, but also during larval periods. In this study, we compared larval development and growth of the two pleuronectids species in detail. Fifty-eight specimens of T. kitaharae larvae and five specimens of G. stelleri larvae were collected from the East Sea, southern Korean Strait, and the adjacent waters of Jeju Island during 2014~2016, and were identified using morphological and molecular markers. Flexion larvae of T. kitaharae (10.23~16.77 mm total length, TL) and G. stelleri (14.33 mm TL) were similar in morphometrics, but can be distinguished by the melanophores in the fin membranes (present in the former vs. absent in the latter), and the melanophores at posterior margin of shoulder girdle (absent in the former vs. present in the latter). Postflexion larvae of T. kitaharae (17.12~24.92 mm TL) and G. stelleri (27.71~32.95 mm TL) differed in the number of melanophores on the mid-lateral caudal region (two in the former vs. five in the latter), and that on the dorsal and anal fin pterygiophores (five or six in the former vs. one row in the latter). Tanakius kitaharae and G. stelleri larvae differed in size at the beginning of metamorphosis. The left eye of T. kitaharae larvae between 23.13~24.92 mm TL reached the dorsal margin of the head while that of G. stelleri larvae between 38.66~42.67 mm TL did not reached yet.

낙동강 하구역에 분포하는 돌가자미 Kareius bicoloratus(Basilewsky)의 식성

  • 전복순;최설화;강용주
    • Proceedings of the Korean Society of Fisheries Technology Conference
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    • 2000.10a
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    • pp.235-236
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    • 2000
  • 돌가자미, Kareius bicoloratus(Basilewsky)는 가자미목 (Order Pleuronectiformes) 가자미과(Family Pleuronectidae)에 속하는 어류이며, 한국, 일본, 중국 연안에 서식한다 (Chyung, 1977; Kim et al., 1994). 본 종에 대해서는 국외에서는 연령형질, 성장, 성숙과 산란, 난치자어, 자원관리 등에 관한 많은 연구가 되어 있으나, 국내에서는 Moon (1997)의 초기생활사에 대한 연구와 Jun et al. (1999)의 난 발생에 대한 연구만 되어 있을 뿐이다. (중략)

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