연근해 주요어종 산란장 연구

지환성,최정화,유준택,김정년,임양재,김진구 한국수산과학회 양식분과 2018 한국수산과학회 양식분과 학술대회 Vol.2018 No.5

Larval Distribution Pattern of Muraenesox cinereus (Anguilliformes: Muraenesocidae) Leptocephali in Waters Adjacent to Korea

지환성,김진구,오택윤,최광호,최정화,서영일 한국해양과학기술원 2015 Ocean science journal Vol.50 No.3

To understand the transport and recruitment processes of the daggertooth pike conger, Muraenesox cinereus, in the marginal seas of East Asia, we investigated the distribution pattern, estimated spawning areas and periods, and recruitment mechanisms of M. cinereus, based on 51 individuals of leptocephali collected from Korean waters during 2010–2014. Back-calculated hatching dates, determined from the daily incremental growth rates of the otoliths, indicated that the spawning period for M. cinereus was during July– September. The size range of M. cinereus leptocephali collected offshore of Jeju Island and southeast of the Korea-Japan intermediate zone was 16.6–20.9 mm TL (age, 18–23 d). We hypothesize that one of the spawning grounds of M. cinereus is located offshore in the East China Sea. In Korean waters, the ages and body lengths of M. cinereus leptocephali increased northward from latitude 31°30'N to 34°40'N, with metamorphosis occurring at latitude 34°40'N. Therefore, we surmised that the hatched preleptocephali of M. cinereus were transported from offshore areas in the East China Sea to Jeju Island and the Korea Strait (KS) by the Kuroshio and Tsushima Warm Current.

Molecular Phylogeny of the Families Pleuronectidae and Poecilopsettidae (PISCES, Pleuronectiformes) from Korea, with a Proposal for a New Classification

지환성,김진구,김병직 한국해양과학기술원 2016 Ocean science journal Vol.51 No.2

A new classification of the Korean pleuronectids was proposed based on a molecular phylogeny using specimens collected from Korea (including some Japanese specimens) between 2008 and 2013. A molecular phylogeny based on partial sequences of the two mitochondrial DNA regions (COI and 16S rRNA) supported the reciprocal monophyly of the three genera, Cleisthenes, Pleuronectes and Pseudopleuronectes. We also found that the genus Poecilopsetta is clearly distinct from Pleuronectidae at the family level. Therefore, the previous classification of the Korean pleuronectids should be changed as follows; two families (Pleuronectidae and Poecilopsettidae), 18 genera, and 26 species. Further research is required to resolve the taxonomic uncertainty of the five species in the genus Limanda, which clustered into two clades in our analysis.

Estimation of Spawning Area of Pisodonophis sangjuensis Ji and Kim, 2011 (Pisces: Ophichthidae) Based on Leptocephali Size and Distribution

지환성,황강석,최정화,차형기,김진구 한국해양과학기술원 2017 Ocean science journal Vol.52 No.2

Pre-metamorphic leptocephali of Pisodonophis sangjuensis (n = 91, 10.4−90.2 mm in total length, TL) were collected in the East China Sea for the first time. Pre-metamorphic leptocephali of P. sangjuensis, which were identified using mitochondrial DNA cytochrome c oxidase subunit I gene (mtDNA COI), are characterized by various combinations of morphological characters: 8 moderate to pronounced gut loops with the kidney terminating on the 6-7th loops; and 8 subcutaneous pigment patches on the tail just ventral to the notochord. Pisodonophis sangjuensis leptocephali were more numerously collected offshore than inshore around Jeju Island. The smallest leptocephali (< 15.0 mm TL) were collected from the south far from Jeju Island, and the largest leptocephali (> 100.0 mm TL) were collected from around Jeju Island and the southern coast of Korea. Our findings indicate that P. sangjuensis spawns offshore south of Jeju Island that is an area associated with high water temperature, and then the hatched leptocephali are transported to Jeju Island or the southern coast of Korea by the Tsushima Warm Current.

Four newly reported ophichthid leptocephali species revealed by mitochondrial 12S rDNA, with implications of their occurrence in Korea

지환성,김진구,이해원,홍병규 한국통합생물학회 2012 Animal cells and systems Vol.16 No.5

Four species of ophichthid leptocephali were identified using 12S rDNA sequences, and their morphological descriptions were first provided based on six individuals (S1S3,M1, and E1E2) collected from the East Sea and the Korea Strait between September 2008 and October 2010. Mitochondrial 12S rDNA 859861 base pairs of ophichthid leptocephali were compared with those of 16 ophichthids adult and 2 outgroups (Anguilla japonica and Conger myriaster). Leptocephali of S1 and E1 were very closely clustered with adult of Scolecenchelys borealis (D0.002) and Echelus uropterus (D0.000), respectively. However, leptocephali of S2S3 andM1 were slightly far clustered with leptocephalus of S1 (D0.006) and adult of Muraenichthys gymnopterus (0.034), respectively. We believe that S1 and E1 are S. borealis and E. uropterus, respectively, in which the former is unrecorded species in Korea. However, S2S3 and M1 may be undescribed species belonging to genus Scolecenchelys and Muraenichthys,respectively, because total numbers of myomeres for S2S3 (148158) and M1 (151) were not consistent with total numbers of vertebrae or distribution for any adult of Scolecenchelys spp. and Muraenichthys spp. in the world. We propose the new Korean name ‘Dong-hae-mul-baem’ for S. borealis.

한국산 투라치과(Lampridiformes: Trachipteridae) 어류의 분류학적 재검토

지환성,김진구,윤상철 한국어류학회 2010 韓國魚類學會誌 Vol.21 No.4

The taxonomic review of the family Trachipteridae was carried out based on the Trachipterus ishikawae (7 specimens), Zu cristatus (4 specimens), Desmodema polystictum (2 specimens)collected from the East Sea, South Sea and adjacent waters of Jeju Island of Korea from June 2006 to August 2008. Among them, D. polystictum was revealed as an unrecorded species from Korea, being characterized by the following characters: the ventral edge smooth; body color silvery white with a lot of large dark rounded spot. We proposed the new Korean name of the genus Desmodema as “Jeomtu-ra-chi-sog”, D. polystictum as “Jeom-tu-ra-chi”. Z. cristatus has a elongated first six dorsal fin and pelvic fin rays. T. ishikawae has a row of sharp tubercles along the ventral edge, and straightly elongated body form. In meristic characters, the number of dorsal fin rays were 178~195 in T. ishikawae, 137~148 in Z. cristatus and 125~130 in D. polystictum, the number of vertebrae were well distinguished among three species; T. ishikawae (80~83), D. polystictum (72~74) and Z. cristatus (65~68). 본 연구는 2006년 6월부터 2008년 8월까지 우리나라 동해, 남해 및 제주도 주변 해역에서 채집된 투라치, Trachipterus ishikawae (Jordan and Snyder, 1901) 7개체, 홍투라치,Zu cristatus (Bonelli, 1820) 4개체 및 1미기록종인 Desmodema polystictum (Ogilby, 1897) 2개체의 형태형질을 조사하여 한국산 투라치과 어류의 분류학적 재검토를 실시하였다. 한국 미기록종인 D. polystictum는 배쪽 가장자리가 매끄럽고, 체측에 어두운 수십개의 둥근 반문이 산재하는 특징을 보여, 새로운 한국명으로 “점투라치”를 제안한다. 홍투라치는 제1~제6 등지느러미 연조 및 배지느러미 연조가길게 신장된 특징을 나타내었다. 투라치는 배쪽 가장자리에날카로운 돌기가 나 있으며, 체형은 가늘고 긴 일직선의 형태를 나타내었다. 계수형질에서는 등지느러미 연조수가 투라치(178~195개), 홍투라치(137~148개), 점투라치(125~130개) 순으로 많았고, 척추골수는 투라치(80~83개), 점투라치(72~74개), 홍투라치(64~68개) 순으로 많아 잘 구분되었다.

남해 및 제주 주변해역 난 및 자치어의 수직분포

지환성,유효재,이보람,이승종,강수경 한국수산과학회 양식분과 2022 한국수산과학회 양식분과 학술대회 Vol.2022 No.5

우리나라 주변해역 미기록 자치어 출현 보고

지환성,최정화,황강석,이정훈,임양재 한국수산과학회 양식분과 2017 한국수산과학회 양식분과 학술대회 Vol.2017 No.5

날붕장어(Echelus uropterus) 엽상자어의 분자동정, 개체발생 및 진화학적 고찰

지환성 ( Hwan Sung Ji ),이수정 ( Soo Jeong Lee ),김진구 ( Jin Koo Kim ) 한국어류학회 2011 韓國魚類學會誌 Vol.23 No.3

동해에서 바다뱀과 엽상자어 7개체 (TL 14.6~68.0 mm)를 채집하여, 미토콘드리아 DNA 12S rRNA 861 bp 염기서열로 종을 동정하고, 이들의 개체발생을 기술하고, 진화적 관계를 고찰하였다. 바다뱀과 엽상자어 7개체는 날붕장어 성어와 유전거리(d=0.000)에서 잘 일치하였다. 날붕장어 엽상자어 7개체는 9개의 소낭이 항문 앞까지 존재하고, 전체 근절수가 154~158개, 전장에 대한 체고가 10% 이하이며, 흑색소포가 항문 뒤부터 꼬리지느러미 앞까지 8개 분포하는 형태적 특징을 보였다. 엽상자어의 형태 및 분자 분석결과를 통해 날붕장어는 진화학상 바다뱀아과 및 갯물뱀아과 사이에 위치하는 그룹으로 사료된다. The seven leptocephali (14.6~68.0 mm in total length) of the family Ophichthidae, from the East Sea of Korea, were identified using 12S rRNA 861-bp sequences and their morphological development were described. Our seven leptocephali were identified to Echelus uropterus based on genetic distance (d=0.000) being well consistent with that of adult E. uropterus. Our seven leptocephali of E. uropterus are characterized by morphological combinations: caudal fin present; the melanophores present in series of nine gut swellings; total myomeres 154~158; body depth in total length less than 10%; eight black horizontal bands present from anus to caudal fin base. Our morphological and molecular results suggest that E. uropterus may be an intermediate group between subfamily Ophichthinae and Myrophinae.

자연 산란된 청어(Clupea pallasii) 자어의 형태 발달

지환성 ( Hwan Sung Ji ),이동우 ( Dong Woo Lee ),최정화 ( Jung Hwa Choi ),최광호 ( Kwang Ho Choi ) 한국수산과학회 2015 한국수산과학회지 Vol.48 No.3

We followed the development of Pacific herring Clupea pallasii larvae after natural hatching in Korean coastal waters off Dadaepo, where the water temperature was 9℃. Twenty days after hatching, the larvae had (i) reached a total length (TL) of 10.8-12.2 mm, (ii) developed 9-11 dorsal fin rays, and (iii) branched melanophores along the dorsal line of the gut in the anterior half of the body and along the posterior half of the dorsal and ventral line. Thirty days after hatching, the larvae had reached 12.2-13.5 mm TL, and the number of dorsal fin rays had increased to 13-14. Thirty-five days days after hatching, the larvae had reached 14.0-14.7 mm TL, and the posterior ends of their noto-chords had begun to flex upward. Forty-five days days after hatching, the larvae had (i) reached 15.6-15.9 mm TL, (ii) a complete set of dorsal fin rays (15-16), (iii) 12-13 anal fin rays, and (iv) branched melanophores along the dor-sal part of the lateral surfaces of the head behind the caudal terminus. Preflexion, flexion and postflexion stage larvae had TL values of 13.5, 14.0-15.3 mm, and 15.6-15.9 mm, respectively.