넙치(Paralichthys olivaceus) 자치어의 소화기관 형태 발달

한경호,김관석,이성훈,Han, Kyeong-Ho,Kim, Kwan-Seok,Lee, Sung-Hoon 한국발생생물학회 2007 발생과 생식 Vol.11 No.2

넙치 자치어의 초기 발육단계에 따른 소화관의 형태 발달과정을 관찰한 결과, 부화 직후의 전기 자어는 평균전장 $25.0{\pm}0.14\;mm$(n=20)로 입과 항문이 아직 열려 있지 않았고, 소화관은 배체와 난황 사이에 원시 소화관의 형태로 거의 직선상으로 식도에서 항문이 생길 부분까지 길게 신장되어 있는 형태였다. 부화 후 $7{\sim}8$일째 후기 자어는 평균 전장 $5.05{\pm}0.40\;mm$(n=20)로 소화관이 발달하여 먹이의 섭취활동이 활발하였으며, 소화관은 배쪽으로 팽창하여 장과 연결되어 위가 발달하기 시작하였고, 소화관의 전반부와 후반부가 구별되어 소화기관이 분화하기 시작하였다. 부화 후 $13{\sim}14$일째 후기 자어는 전장이 $6.50{\pm}0.25\;mm$(n=20)였고, 소화관은 앞부분에서부터 1회전되어 회전부분의 면적이 넓어져 있었으며, 소화관이 식도, 전장, 중장, 후장으로 완전히 분화되면서 소화관의 기본적인 구조가 확립되었다. 부화 후 30일째 개체는 전장 $12.40{\pm}0.55\;mm$(n=20)로 위는 비대하여 분문부와 유문부가 뚜렷하게 구별되었고, 소화관은 위, 전장, 중장, 후장 및 직장이 명확하게 구분되어 치어기로 이행하여 성어와 유사한 구조로 발달하였다. 부화 후 40일째 치어는 전장이 $16.15{\pm}0.85\;mm$(n=20)로 소화관 형태는 식도부, 유문부, 장의 전장, 중장, 직장이 크게 팽창되어 상대적으로 후기 자어의 소화관 형태와는 다소 차이가 있었다. Morphological changes on digestive tract were observed using Flounder, Paralichthys olivaceus to elucidate the early developmental processes. Hatched larvae, ($2.50{\pm}0.14\;mm$ in total length: TL) has not opened its mouth and anus. The digestive tract showed linear tubular form from mouth to anus extending along with yolk. On $7{\sim}8$ days from hatching, the post-larvae, ($5.05{\pm}0.40\;mm$ TL) has developed digestive tract and activated for feeding. The digestive tract expanded into dorsal side, joined to intestine, and the stomach began to develop. The digestive tract was divided into an anterior and posterior region, and began to differentiate. In the post-larvae($6.50{\pm}0.25\;mm$ TL) on $13{\sim}14$ days from hatching, the digestive tract twisted one cycle in the anterior region, the area was expanded. The digestive tract was completely differentiated into oesophagus, anterior intestine, middle intestine, posterior intestine and arranges fundamental structure. In the embryo($12.40{\pm}0.55\;mm$ TL) after 30 days from hatching, stomach became large and could be distinguished from cardia and pyloric parts apparently. The digestive tract developed similar with that of adult flounder showing clear division of stomach, anterior intestine, middle intestine, posterior intestine and rectum. In the embryo($16.15{\pm}0.85\;mm$ TL) after 40 days from hatching, esophagus, pyloric part, anterior intestine, middle intestine, and rectum have largely expanded, and thus the morphological features are somewhot different with those of post-larvae flounder.

청어(Clupea pallasii)의 난발생 및 자어의 형태

한경호 (Kyeong Ho Han)이성훈(Sung Hoon Lee),황재호(Jae Ho Hwang),연인호(In Ho Yeon),김희진(Hui Jin Kim),오성재(Seong Jae Oh) 전남대학교 수산과학연구소 2011 수산과학연구소논문집 Vol.19 No.-

이 연구는 2004년 2월 12일에 여수시 돌산읍 하동주변해역에서 해조류에 부착되어있는 수정난과 이각망을 이용하여 채집한 어미를 전남대학교 자원생물 실험실로 운반하고 건식법으로 수정한 난의 발생과정 및 부화한 자어를 관찰하였다. 청어의 수정난은 구형의 무색투명한 침성점착난으로 난황이 벌집과 같은 형태이고, 난경은 1.31~1.43㎜(n=50)이었다. 수정 후 42분이 경과하여 배반이 형성되기 시작하였고, 수정 후 1시간 48분 후에 2세포기에 달하였다. 분화가 계속 진행되면서 수정 후 11시간 13분 후에 상실기에 달하였으며, 수정 후 21시간 46분만에 포배기에 달하였다. 수정 후 27시간 58분에 배체가 형성되기 시작하였고, 수정 후 44시간 34분에 렌즈와 이포가 형성되었으며, 수정 후 67시간 30분에는 렌즈가 착색과 가슴지느러미가 분화하였다. 수정 후 96시간 56분에 첫 부화가 시작되었다. 부화 직후 자어는 전장이 평균 6.82 ㎜로 난황을 달고 있었고, 입과 항문은 열려 있지 않았으며, 항문은 전장의 75~80%에 위치하였다. 흑색소포는 나타나지 않았고, 근절은 40~43개였으며, 지느러미는 막상 이었다. 부화 후 1일째 자어는 평균 전장이 7.15㎜로, 입과 항문이 열리기 시작하였다. 부화 후 6일째 자어는 평균전장이 8.99㎜로 난황이 완전히 흡수되었다. 부화 후 20일째 자어는 꼬리말단이 휘어지기 시작하였고, 등지느러미 부분에 5~6개의 줄기가 나타났다. In order to monitor the early developmental features of the Pacific herring, Clupea pallasii larvae and embryos, the fertilized eggs were artificially inseminated by dry method. The fertilized eggs were colorless and transparent spherical, and demersal and adhesive. The diameter of fertilized eggs was 1.31~1.43 mm (n=50). The fertilized eggs started to hatch at 96 hrs 56 min after fertilization. The total length of the hatched larvae was 6.82 mm. At hatching, the mouth and anus of the larva were not opened yet showing yolk sack and 40~43 myomeres. Yolk was completely absorbed at 6 days after hatching and the total length of post-larvae was 8.99 mm. At the 13 days after hatching, the end of tail fin became curved and the 5~6 stems were appeared at dorsal fin.

흑산도 연안에서 기선저인망에 어획되는 어류의 종조성 및 양적변동

한경호(Kyeong-Ho Han),유태식(Tae-Sik Yu),이진(Jin Lee),이성훈(Sung-Hoon Lee) 전남대학교 수산과학연구소 2019 수산과학연구소논문집 Vol.28 No.-

Fluctuation in the abundance and species composition of fishes in the coastal waters of Heuksan-do, Shinan, Jeollanam-do, Korea were investigated from 2013 to 2015. A total of 2,044 fishes were sampled and classified into 94 species, 56 families, and 15 orders. The dominant species was Engraulis japonicus (217 individuals, 1,918 g), followed by Leiognathus nuchalis (198 individuals, 3,016 g), and Coilia nasus (121 individuals, 2,129 g). The highest number of individuals was found in 2013, while the biomass was the highest in 2015. The diversity index was the highest in 2013 (Hʹ=3.692) and the lowest in 2015 (Hʹ=3.561). The dominance index was the highest in 2015 (D=0.312) and the lowest in 2013 (D=0.220). The richness index was the highest in 2014 (RI=12.440) and the lowest in 2015 (RI=11.050). The economically important species in this area are Okamejei kenojei, Beringraja pulchra, Conger myriaster, Coelorinchus multispinulosus, Lophiomus setigerus, Sebastes schlegeli, Leiognathus nuchalis, Larimichthys polyactis, and Trichiurus lepturus.

봄-여름 고창 연안에서 주목망에 어획된 어류의 출현양상

한경호(Kyeong-Ho HAN),노성삼(Sung-Sam ROH),유태식(Tae-Sik YU),차상훈(Sang-Hun CHA),이성훈(Sung-Hoon LEE) 한국해양바이오학회 2021 한국해양바이오학회지 Vol.13 No.2

In 2014, fishes caught using stow nets in coastal waters off Gochang from May to October were assessed for appearance patterns. The fishes were caught at four research stations (St.) and were found to comprise 37 species, 18 families, and 7 orders. The dominant species were Thryssa kammalensis, Setipinna tenuifilis, and Sardinella zunasi. To gain a measure of their biodiversity, all species were assessed for their number, richness, diversity, evenness, and dominance. The highest and lowest numbers of total fishes caught were recorded in September (4,819 individuals) and October (828 individuals), respectively. The diversity was the highest in October (H’ = 2.478) and lowest in June (H’ = 0.880). The evenness index was the highest in October (E = 0.780) and lowest in June (E = 0.343). The richness index was the highest in October (R = 3.424) and lowest in May (R = 1.552). Finally, the dominance index was the highest in June (D = 86.2%) and lowest in October (D = 40.3%).

흑산도 연안에서 통발에 어획된 어류 종조성 및 연변동

이성훈(Sung-Hoon Lee),유태식(Tae-Sik Yu),한경호(Kyeong-Ho Han) 전남대학교 수산과학연구소 2020 수산과학연구소논문집 Vol.28 No.2

Species composition and yearly variation of fish in coastal waters off Heuksan island were investigated using seasonal samples collected by fish pots from 2015 to 2017. A total of 269 fishes were sampled and classified into 25 species, 16 families, and 6 orders. The dominant species were Sebastes schlegelii (44 individuals, 11,790 g), followed by Conger myriaster (38 individuals, 5,240 g), and Hexagrammos agrammus (24 individuals, 2,650 g). By year, the highest number of individuals was found in 2015 (97 individuals, 15,107 g), while the lowest in 2017 (76 individuals, 11,364 g). The diversity index was the highest in 2015 (Hʹ=2.66) and the lowest in 2017 (Hʹ=2.42). The richness index was the highest in 2015 (RI=4.15) and the lowest in 2017 (RI=3.23). The evenness index was the highest in 2016 (J=0.90) and the lowest in 2015 (J=0.89). The dominance index was the highest in 2017 (D=34.2%) and the lowest in 2015 (D=29.9%). Highly economic species, such as Muraenesox cinereus, Conger myriaster, Sebastes schlegelii, Liparis tanakai, Pleuronichthys cornutus, and Takifugu rubripes, were caught.

진해만 북부 해역에 분포하는 부유성 난 및 자치어의 종조성 및 양적변동

한경호 ( Kyeong-ho Han ),유태식 ( Tae-sik Yu ),이진 ( Jin Lee ),이성훈 ( Sung-hoon Lee ) 한국수산과학회(구 한국수산학회) 2018 한국수산과학회지 Vol.51 No.1

Fish eggs and larvae were collected in July and November of 2013 and January and May of 2014 to determine seasonal variation in the species composition of ichtyoplankton. Samples were classified based on morphological characteristics. Fish eggs were identified as belonging to five taxa; the most dominant species of fish eggs was Engraulis japonicus (62.05%) followed by Sardinops melanostictus (21.02%) and Leiognathus nuchalis (13.71%). These three species accounted for 96.8% of the total number of fish eggs collected. Larvae of 17 species in six families, and six orders were collected. The most dominant species of fish larvae was E. japonicus (51.79%), followed by L. nuchalis (12.59%) and Omobranchus elegans (12.08%). These three species accounted for 76.46% of the total number of larvae collected. Jinhae Bay was identified as a major spawning and nursery ground for fish species inhabiting in the south coast of Korea, such as E. japonicus, L. nuchalis, S. melanostictus, and Omobranchus elegans. Therefore, management of marine fish resources in the South Sea should necessarily include the ecological management of Jinhae Bay.

양태과 (Platycephalidae) 어류 3종의 척추골과 담기골 특징

한경호(Kyeong-Ho Han),이성훈(Sung-Hoon Lee),김희진(Hee-Jin Kim),추보라(Bo-Ra Chu) 전남대학교 수산과학연구소 2020 수산과학연구소논문집 Vol.28 No.2

In order to study osteology on the family Platycephalidae 3 species (Platycephalus indicus; Cociella crocodila; Inegocia japonica) were collected in Yeosu city Namsan fish market and Goheung Nokdong fish market from January 2014 to October 2014, and were applied to analyzes such as osteological charcteristic. The family Platycephalidae 3 species were the same vertebrae number as 26, but P. indicus was different from C. crocodila and I. japonica by having 11~12 abodominal vertebrae and 14~15 caudal vertebrae. Both of C. crocodila and I. japonica were the same by having 10 abodominal vertebrae and 16 caudal vertebrae. Dorsal pterygiophores of P. indicus was 22 and formula of pterygiophores was 2*12111111112111111111. Anal pterygiophores which is ventral pterygiophores was 13 and it started from 11th vertebrae. C. crocodila’s dorsal pterygiophores was 19 and the formula of pterygiophores showed 2*111111111211111111. Anal pterygiophores was 11 and started from 11th vertebrae. The dorsal pterygiophores of I. japonica was 22 and the formula of pterygiophores was 2*12111111121111111111. Anal pterygiophores was counted 13 and it started from 11th vertebrae. Therefore, the pterygiophores formula on the family Platycephalidae 3 species were distinguished one another.

거문도 연안에서 저인망에 어획되는 어류의 종조성 및 양적 변동

이성훈(Sung-Hoon LEE),추은경(Eun-Kyeong CHU),이진(Jin-LEE),한경호(Kyeong-Ho HAN) 전남대학교 어업기술연구소 2019 어업기술연구소보고지 Vol.12 No.1

The fishes were caught by otter trawl from November, 2007 to October, 2008 in coastal waters off Geomundo. A total of 4,645 fishes were sampled and classified into 76 species, 40 families, and 12 orders. Of the 12 orders, Clupeiformes, Gadiformes, Perciformes accounted for approximately 83.7% of the fishes in this area. Of 76 species identified, Argyrosomus argentatus, Acanthogobius flavimanus, Nuchequula nuchalis, Coelorinchus japonicus, Engraulis japonicus accounted for 54.6% of the fishes collected. The highest number of individuals was found in summer, while the lowest in autumn. The richness index was highest in spring(RI=7.934) and lowest in winter(RI=6.701). The eveness index was highest in spring(E=0.740) and lowest in winter(E=0.690). The diversity index was highest in spring(H’=3.005) and lowest in winter(H’=2.671).

아산만 연안에서 소형 저인망에 어획되는 어류의 종조성 및 계절 변동

한경호(Kyeong-Ho HAN),이성훈(Sung-Hoon LEE),유태식(Tae-Sik YU) 전남대학교 어업기술연구소 2019 어업기술연구소보고지 Vol.12 No.1

Seasonal fluctuations in the abundance and species composition of fishes in coastal waters off Asan bay were investigated from April, 2012 to January, 2013. A total of 3,057 fishes were sampled and classified into 71 species, 35 families, and 11 orders. Of the 11 orders, Perciformes, Scorpaeniformes, and Pleuronectiformes accounted for approximately 61.97% of the fishes in this area. Of 71 species identified, Engraulis japonicus, Leiognathus nuchalis, Trichiurus japonicus, Pholis fangi, and Konosirus punctatus accounted for 36.57% of collected fishes. The highest number of individuals was found in July, while the lowest in January. The richness index was highest in July (RI=7.103) and the lowest in January(RI=4.708). The eveness index was the highest in July(E=0.912) and the lowest in October(E=0.766). The diversity index was the highest in July(H’=1.429) and the lowest in October(H’=2.862).

순천만에 분포하는 개소겡(Taenioides rubicundus)의 서식 및 산란

박상언(Sang Un PARK),이성훈(Sung Hoon LEE),유동재(Dong Jae YOO),김춘철(Chun Chel KIM),황재호(Jae Ho HWANG),연인호(In Ho YEON),한경호(Kyeong Ho HAN) 전남대학교 수산과학연구소 2007 수산과학연구소논문집 Vol.16 No.-

전라남도 순천만에서 2004년 3월부터 2005년 3월까지 개소겡의 서식생태와 산란에 관하여 기초자료를 얻었다. 개소겡의 서식지 수온의 년평균은 최저 6.30℃였고, 최고 29.28℃였으며, 염분은 년평균 최저 18.20‰이였고, 최고 30.48‰이였다. 개소겡의 서식지는 저질이 펄질인 연안으로서 저질의 입도는 사질(Sand) 입자가 7.0%, 실트질(Silt)입자 53.5%, 점토질(Clay) 입자 39.5%로 이루어져 있었고, 개소겡은 이곳에서 5~8개의 굴을 파서 살고 있었다. 수컷의 생식소 중량지수는 서서히 증가하는데 반하여 암컷의 생식소 중량지수는 5월에 접어들면서 급격히 증가하기 시작하여 5월 중순에 최고값을 기록하였으며, 6월 초에는 다소 감소한 것을 알 수 있었다. 이것으로 보아 5~7월이 산란기임을 알 수 있었다. 개소겡 난소내의 난수는 1만 9천개~2만 1천 정도이며, 난경의 4월 평균 0.34mm에서 산란기인 6월에는 평균 0.74mm로 난소의 크기에 비례하여 알의 크기가 커지고 있었다. 개소겡의 서식지 크기는 평균 122cm였고, 입구의 넓이가 3~4cm인 굴을 5~8개 뚫으며, 서식굴의 안쪽 벽에 3,000~4,000개의 알을 낳아 수컷이 보호하였다. The habitat and spawning of the green eel goby, Taenioides rubicundus were studied in the mud flat of the Sunchun bay, Jeollanam-do. Maximum and minimum water temperature and salinity in the habitat were 29.28℃, 6.30℃, and 30.48‰, 18.20‰, respectively. Green eel goby is living in 5 to 8 caves in coastal mud consisting of sand(7.0%), silt(53.5%), and clay(39.5%). Gonadosomatic index in male was increased slowly, but gonadosomatic index in female was rapidly increased in May and reached to the highest record in the middle of May, and turned to decrease in the beginning of June. Therefore, it was speculated that May is the spawning season for green eel goby. The number of eggs in ovary was 19,000 to 21,000, the diameter of egg was 0.34mm in April and 0.74mm in June. The diameter was bigger together with the size of ovary. Depth in the cave was average 122cm, width of entrance was 3~4cm, and male green eel goby keeps 3,000~4,000 eggs in inside of cave.