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고등어과 물치다래속(Auxis , Scombridae) 자어의 분자동정 및 형태발달
지환성 ( Hwan Sung Ji ),유준택 ( Joon Taek Yoo ),유정화 ( Jung Hwa Ryu ),김진구 ( Jin Koo Kim ) 한국수산과학회(구 한국수산학회) 2011 한국수산과학회지 Vol.44 No.6
Eleven individual larvae (3.6-8.0 mm notochord length, NL) were collected from the southern East Sea of Korea in July, 2010, and the adjacent Sea of Jeju Island in August, 2011. Five individuals were identified using mitochondrial DNA cytochrome oxidase subunit I (COI) sequences (494 base pairs). All were identified as Auxis rochei , their mtCOI sequences being consistent with those of adult A. rochei (d=0.000), followed by Auxis thazard (d=0.027). In terms of morphology, A. rochei larvae showed a preflexion stage of 4.8 mm NL, but a flexion stage between 5.2-6.2 mm NL, and subsequently a postflexion stage between 6.6-8.0 mm NL. During the larval stage, A. rochei differed from A. thazard in having no (or few) melanophores in the lateral caudal region.
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.
한국산 바다뱀장어과 (개칭) (Ophichthidae: Anguilliformes) 어류의 종 목록 및 국명 개칭
지환성 ( Hwan-sung Ji ),강충배 ( Chung-bae Kang ),김진구 ( Jin-koo Kim ) 한국어류학회 2021 韓國魚類學會誌 Vol.33 No.4
A checklist of snake eels (Ophichthidae) from Korea is presented including information, such as synonyms, distribution, occurrence records and key to species of 7 genera and 14 species. Also, we suggest change of the Korean names for the snake eels (Ophichthidae) “Ba-da-baem-gwa” to “Ba-da-baem-jang-eo-gwa”, and it’s members, because Korean names of snake eels (Ophichthidae) is similar to those of sea snake (Hydridae).
그물에 부착한 청어 (Clupea pallasii) 어란의 자연 부화유도 및 관리방안
지환성 ( Hwan Sung Ji ),이동우 ( Dong Woo Lee ),최정화 ( Jung Hwa Choi ),최광호 ( Kwang Ho Choi ) 한국수산해양기술학회 2015 수산해양기술연구 Vol.51 No.3
Pacific herring Clupea pallasii eggs were attached to the gill net in Korean coastal waters off Busan. To conservation and management the eggs attached to the gill net, we followed the natural hatching in coastal waters from five days after fertilization to the hatching finished, where the temperature was 9°C. The diameter of fertilized eggs was 1.24-1.55 mm (n= 50), and had a segmented pale yellow yolk, no oil globule. Natural hatching had started by 10 days after fertilization. Mass hatching occurred around 11-12 days after fertilization, most of eggs separated from the gill net. Therefore, when the Pacific herring eggs attached in gill net, should be natural hatching-induced in coastal waters during 12-14 days.
한국 주변해역 바다뱀과(Anguilliformes: Ophichthidae) 어류의 분류학적 재검토
지환성 ( Hwan Sung Ji ),김진구 ( Jin Koo Kim ) 한국어류학회 2011 韓國魚類學會誌 Vol.23 No.1
본 연구는 2005년부터 2009년까지 우리나라 주변해역에서 서식하는 바다뱀과 6속 10종의 형태형질을 조사하여 분류학적 재검토를 실시하였다. 계수에서는 척추골수가 바다뱀이 201~209개로 가장 많았으며, 둥근물뱀(178~183개), 돛물뱀 (179~182개), 돌기바다뱀 (153~164개), 날붕장어(152~158개), 갯물뱀(155~156개), 까치물뱀(150~154개), 자물뱀(137~148개), 갈물뱀(135~138개) 제주바다뱀(124~134개) 순으로 나타났다. 계측에서는 두장에 대한 주둥이 길이(바다뱀속 27.2~31.2 vs. 날붕장어속 18.0~27.7 vs. 까치물뱀속 12.3~21.5 vs. 돛물뱀속 16.5~20.8 vs. 갯물뱀속 11.4~11.9 vs. 자물뱀속 9.1~9.4)에서 잘 구분되었다. 한국 주변해역 바다뱀과 6속 10종의 종 검색표를 처음으로 제안하였다. A taxonomic review of 6 genera and 10 species in the family Ophichthidae was carried out based on specimens from the adjacent waters of Korea. The number of vertebrae distinguished the species of each genus: Ophisurus macrorhynchos (201~209), Ophichthus rotundus (178~183), Pisodonophis zophistius (179~182), P. cancrivorus (153~164), Echelus uropterus (152~158), Muraenichthys gymnopterus (155~156), Ophichthus evermanni (150~154), Brachysomophis porphyreus (137~148), Ophichthus urolophus (135~138), Ophichthus asakusae (124~134). Snout length in head length distinguished the 6 genera: Ophisurus (27.2~31.2), Echelus (18.0~27.7), Ophichthus (12.3~21.5), Pisodonophis (16.5~20.8), Muraenichthys (11.4~11.9), Brachysomophis (9.1~9.4). A key to the 6 genera and 10 species of the family Ophichthidae from the adjacent waters of Korea is provided.
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.
제주도 남동부해역에서 채집된 바다뱀( Ophisurus macrorhynchos ) (뱀장어목: 바다뱀과) 엽상자어의 첫 형태기재 및 분포특성
지환성 ( Hwan Sung Ji ),최정화 ( Jung Hwa Choi ),최광호 ( Kwang Ho Choi ),윤상철 ( Sang Chul Yoon ),이동우 ( Dong Woo Lee ),김진구 ( Jin Koo Kim ) 한국수산과학회 2014 한국수산과학회지 Vol.47 No.6
Seventeen specimens of leptocephali [9.8-44.5 mm total length (TL)], of the family Ophichthidae, were collected from southeastern waters off Jeju Island and the Korea.Japan intermediate zone, and identified by means of morphology and genetics. These specimens were identified as belonging to the subfamily Ophichthinae based on various combinations of morphological characters: 211-215 total myomeres; 7 gut swellings; 2 liver lobes connected with the gall bladder on the second lobe; 6-7 postanal pigments present from anus to caudal margin. An analysis of the partial 12S rRNA sequences (849 base pairs) of mitochondrial DNA showed that our specimens must be Ophisurus macrorhynchos because their sequences were concordant with those of the adult O. macrorhynchos (genetic distance = 0.000). Furthermore, their total myomeres were consistent with those of the O. macrorhynchos adult. This is the first time that the morphological characteristics of O. macrorhynchos leptocephali have been described for Korean waters, and we suggest diagnostic characteristics for the genus Ophisurus leptocephali. We hypothesize that one of the spawning grounds of O. macrorhynchos is located in the southeastern part of Jeju Island.
한국 제주도에서 채집된 갯물뱀 (뱀장어목: 바다뱀과) 엽상자어 (Leptocephalus)의 형태 및 분자동정
지환성 ( Hwan Sung Ji ),김진구 ( Jin Koo Kim ) 한국수산과학회(구 한국수산학회) 2012 한국수산과학회지 Vol.45 No.5
One leptocephalus (TL 59.9 mm) from the family Ophichthidae collected from Jeju Island, Korea, was identified using morphological and molecular methods. Our ophichthid leptocephalus was identified as belonging to the genus Muraenichthys based on morphological characters: 157 myomeres; the origin of the dorsal fin located a little in front of the anus; a distinct melanophore present on the opercie; and six gut swellings present. An analysis of 886 base pairs of the I 2SrRNA mtDNA sequences showed that our leptocephalus must be Muraenichthys gymnopterus, because its sequences were concordant with those of an adult M. gymnopterus (d0.00 I) and next to those of Muraenichthys sp. leptocephalus (d=0.034). Here, we are the first to describe the morphological characteristics of the M. gymnoprerus leptocephalus.