금강 및 만경강 하구에서 채집된 뱀장어의 연령과 성장

황학빈,황선완,이태원 한국어류학회 2004 한국어류학회 추계학술발표요약집 Vol.- No.-

단보 : 이각망에 채집된 2008년 태안 연안 어류 종조성

황학빈 ( Hak Bin Hwang ),이태원 ( Tae Won Lee ) 한국수산과학회(구 한국수산학회) 2011 한국수산과학회지 Vol.44 No.2

The species and size compositions of fishes in the coastal waters off Taean were determined using samples collected with a two-sided fyke net in 2008. A total of 22 species, 2,371 individuals and 1,351 kg of fish were collected during the study. Of the fish collected, semi-benthic fishes such as Sebastes schlegelii, Mugil cephalus and Chelon haematocheilus were the most abundant (77.5% and 76.4% for total number of individuals and biomass, respectively). Benthic fishes such as Pleuronectus yokohamae and Paralichthys olivaceus were collected in almost all seasons but were low in abundance (5.3% and 4.1% for total number of individuals and biomass, respectively). Seasonal migrants were plentiful; specifically, Seriola quinqueradiata was abundant in November while Konosirus punctaus was common in July. Seasonal migrants of small-sized fish have been known to be abundant in the coastal water of western Korea including the study area, but few fish less than 100 mm were collected due to the large mesh size (30 mm) of the net used.

제주 천제연 하구 소상어류의 월별 종조성

황학빈 ( Hak Bin Hwang ),이태원 ( Tae Won Lee ),황선완 ( Sun Wan Hwang ),김병직 ( Byung Jik Kim ) 한국어류학회 2008 韓國魚類學會誌 Vol.20 No.3

아산만 천해역 수심에 따른 어류 종 조성의 계절 변동

이태원,황학빈 한국어류학회 1999 韓國魚類學會誌 Vol.11 No.1

Seasonal variation in species composition of fish with depth was determined by analysis of bimonthly samples collected by a beach seine at the shallow water(St. 1<1.5m) and by beam trawl at the two stations(St. 2, 5∼7m and St. 3>15m) from October 1997 to August 1998 off Ippa-do in Asan Bay. Of forty species identified, 13 species at St. 1, 28 species at the St. 2 and 30 species at the St. 3 were collected. The fish density was also increased with depth. Favonigobius gymnauchen occupied 55.7% at St. 1 and 38.9% of the number of individuals at St. 2. Almost of fish collected at these two stations were juveniles, and they were principally collected in August and in November. At St. 3, relatively large fishes were collected. Among them Pholis fangi and Chaeturichthys stigmatias predominated in the number of individuals. Abundance was low, but a large number of species were collected in winter. Principal component analysis revealed that the species composition at the shallower stations was different from that at the deeper station. The number of species and abundance of fish in Asan Bay was lower than in the other western coastal waters of Korea. Species composition in the study area of sandy bottom was different from that in the inner Asan Bay of mud bottom.

새만금 방조제 물막이 완공 후인 2006-2007년 새만금호 어류 종조성의 변화

이태원,황학빈,황선완,Lee, Tae-Won,Hwang, Hak-Bin,Hwang, Sun-Wan 한국해양학회 2007 바다 Vol.12 No.3

새만금 방조제 4공구 물막이 완공 후인 2006년 4월부터 2007년 2월 사이 새만금호에서 계절별로 otter trawl로 어류를 채집하여 어류 종조성의 계절변동을 분석하고 물막이 공사 중인 2001-2002년의 자료와 비교하였다. 조사기간 중 총 35종, 8,960 마리, 53,084.4 g의 어류가 채집되었으며, 기수 및 내만어종인 전어(Konosirus punctatus), 풀망둑(Synechogobius hasta)과 돛양태(Repomucenus lunatus), 회유종인 멸치(Engraulis japonicus)와 삼치(Scomberomorus niphonius)가 우점하여 이 5종이 전체 개체수의 95%를 차지하였다. 출현종수와 채집량은 서해의 다른 연안역에서와 같이 봄과 가을에는 주거종이 주를 이루었다. 여름에는 회유종이 대량 출현하여 출현종수와 채집량이 가장 높았으며, 겨울에는 2종만이 채집되었고 생체량도 가장 낮았다. 물막이 공사 후 기수 및 내만성인 전어의 양이 크게 증가 하였고, 일시적으로 새만금호에 몰려온 멸치나 삼치와 같은 외해 부어류들이 좁아진 새만금호 해수역에 밀집되어 otter trawl에 일시적으로 대량 채집되어 소수종의 우점도가 높아졌다. 물막이 공사 이전 대량 채집되었던 주둥치 (Leiognathus nuchalis), 젓뱅어(Neosalanx jordani), 쉬쉬망둑(Chaeturichthys stigmatias) 등은 거의 채집되지 않았다. 어류 밀도는 물막이 공사 중인 2001-2002년에는 $1,149\;inds./10,000m^2,\;12,644g/10,000m^2$에 비하여, 물막이 공사 후인 2006-2007년에는 $7,467\;inds./10,000m^2,\;44,237g/10,000m^2$로, 개체수밀도는 6배 이상, 생체량 밀도는 3배 이상 높았다. 연간 종풍도지수(R)와 종다양성지수(H')는 2001-2002년에 R=0.0160, H'=2.47에 비하여 2006-2007년에는 R=0.0038, H'=1.11로 낮아졌다. 물막이 공사 후 새만금호의 해수역이 줄어들고 수질이 변하면서 어류 서식에 부적합한 환경이 조성되어 종풍도 지수와 종다양성지수가 낮아지고, 소수 기회종의 우점도가 높아진 것으로 보인다. Seasonal variation in species composition of fish in the Saemangeum Reservoir was determined using seasonal samples collected by an otter trawl from April 2006 to February 2007 after the dike construction, and compared with the data obtained during the dike construction in 2001-2002. A total of 35 species, 8,960 individuals and 53,084.4 g of fish were collected during the study. Of the fish collected, brackish and coastal fishes such as Konosirus punctatus, Synechogobius hasta and Repomucenus lunatus, and migrant fishes such as Engraulis japonicus and Scomberomorus niphonius predominated in abundance accounting for 95% in the total number of individuals. Fish species composition and abundance showed a similar seasonal trend to those in the other western coastal waters of Korea. The resident species were mainly collected in spring and in autumn. The number of species and biomass were high in summer by the large amount of catch of migrating species. Catch was low in winter and only 2 species were collected. A brackish and coastal fish, K. punctatus and two migrant fishes, E. japonicus and S. niphonius were abundantly collected after the dike construction. However, the dominant fishes during the dike construction such as Leiognathus nuchalis, Neosalanx jordani and Chaeturichthys stigmatias were rarely collected. Fish density was $1,149\;inds./10,000m^2\;and\;12,644g/10,000m^2$ during the dike construction, and increased 6 times in the number of individuals ($7,467\;inds./10,000m^2$) and 3 times in biomass ($44,237g/10,000m^2$) after the dike construction. Annual species richness (R) and species diversity (H') decreased from R=0.0160 and H'=2.47 during the dike construction in 2001-2002 to R=0.0038 and H'=1.11 after dike construction in 2006-2006, respectively. These changes seemed to be related to the reduction of the saline area and degradation of water quality in Semangeum Reservoir after the dike construction.

한국 서해 문치가자미(Marbled Sole, Pseudopleuronectes yokohamae)의 성숙과 성장

황선완,황학빈,황선도 한국해양과학기술원 2017 Ocean and Polar Research Vol.39 No.4

We determined the maturity and growth of the Marbled sole, Pseudopleuronectes yokohamae based on monthly sampling in the West Sea of Korea from February 2009 to December 2010. Determination of sex of P. yokohamae was by gonadal inspection, and age and growth were determined by analyzing the otolith. The biological minimum size of P. yokohamae female was 24.5 cm. The seasonal changes in the ratio of a translucent zone to an opaque zone revealed that the end of the translucent zone of the otolith were annuli formed in May once a year. We compared 8 type growth equations with several length-at-age data. By using the length-at-monthly age data of these, the calculated von Bertalanffy growth equations were Lt = 41.7(1 − e−0.47(t + 0.24)) for females and Lt = 32.7(1 − e−0.75(t + 0.01)) for males. We estimated that 24.5 cm was the total length of 2 year old P. yokohamae spawns in the cold water season from January to April, and grows to 8 years old for females and 6 years old for males in the West Sea of Korea.

천수만 방조제 건설 후 대천 해빈 천해 어류의 중장기 종조성 변화

권순열,황학빈,홍지민,이태원 한국해양과학기술원 2020 Ocean and Polar Research Vol.42 No.2

Species composition of fish in the shallow water at Daecheon beach was determined using monthly beach seine samples collected from April 2010 to March 2011. These data were compared with the previous data, one just after reclamation in 1984–1985, and the other in 1995–96, in order to assess the post-reclamation impact of the environmental change on the fish assemblage. A total of 30 species from 1,464 individuals with biomass of 17,808 g were identified. Dominant species in the number of individuals were Chelon haematocheilus (49.3%), Takifugu niphobles (13.7%) and Paralichthys olivaceus (10.0%). Among pelagic fish, migrant juvenile fish such as Sardinella zunasi and Thryssa kammalensis were abundantly collected in 1984–85, but the catch amount was gradually decreased as time untill only few pelagic fish were collected in 2010–2011. The benthic fish were most abundant in 1984–1985 among habitat groups, and Favonigobius gymnauchen and Kareius bicoloratus were the top two predominants. Species composition of benthic fish did not exhibited drastic changes in 1995–1996, but both the abundance decline and the species composition change was evident in 2010–2011. Among the semi-benthic fish from 1984–1985 samples, Sillago japonica and Konosirus punctatus predominated. Species composition was slightly changed in 1995–1996, but significant changes were met in 2010–2011 with the two predominats, Chelon haematocheilus and Takifufuniphobles. These changes in fish species composition may reflect the post-reclamation effect of the impaired water quality and the accumulation of organic rich fine sediments.

태안 해빈 천해어류의 종조성 변화

이정훈,권순열,황학빈,이태원 대한조선학회 2011 대한조선학회 학술대회자료집 Vol.2011 No.6

Temporal Occurrence Patterns and Habitat Use of Fish in the Mangyeong Estuary on the Western Coast of Korea in 2003, before Dike Enclosure

황선완,이태원,황학빈,황선도 한국해양과학기술원 2011 Ocean science journal Vol.46 No.4

We documented the temporal occurrence patterns and habitat use of fish in the Mangyeong River estuary on the western coast of Korea from February to December 2003 based on monthly samples collected with a stow net. A total of 46 fish species were collected during the study period. Chelon haematocheilus, Konosirus punctatus, Neosalanx jordani, Sardinella zunasi, Synechogobius hasta, and Thryssa kammalensis were the predominate species, accounting for 84.4% of the collected fish. We classified the fish as brackish water (BF), coastal migratory (CMF), diadromous (DF), or freshwater (FF) fish. BF such as C. haematocheilus, S. hasta, and Coilia nasus were the most abundant and were collected almost year-round. As water temperatures increased in spring, adult CMF, such as K. punctatus, S. zunasi, T. kammalensis, T. adelae, Johnius grypotus, Miichthys miiuy, and Larimichthys polyactis, entered the estuary. In summer, large numbers of their juvenile offspring were caught, indicating a peak in fish abundance. The juveniles grew in the estuary before moving out to deeper waters for overwintering. Diadromous juveniles, such as those of Anguilla japonica (commonly known as glass eel), were collected in the spring during their upstream migration. FF, such as Carassius cuvieri and Acheilognathus rhombeus, were collected during the rainy season. In terms of the number of species, the number of individuals, and the biomass, the ratio of BF to all other fish type classifications in the Mangyeong Estuary (without a dam)was higher than that in the Geum River estuary (with a dam). The fish assemblage in the Mangyeong Estuary still maintained estuarine characteristics before dike enclosure, providing habitats for BF, nursery grounds for CMF, and migratory pathways for DF.

실험 어도에서 실뱀장어의 소상 행동

황선도,이태원,황학빈,최일수,황선재 한국어류학회 2010 韓國魚類學會誌 Vol.21 No.4

Upstream behavior of glass eels was examined in an experimental eel-ladder at a laboratory of the National Fisheries Research and Development Institute from March to May in 2008. The study was made under various environmental factors and conditions affecting the upstream migration of glass eels in order to design a functional ladder that would allow the passage of glass eels. The experimental eel-ladder consisted of an upper freshwater chamber and a lower sea water chamber;glass eels in sea water can move up to the upper freshwater chamber through the slope (eel-ladder)between them. The optimal condition of the eel-ladder was estimated by comparing the number of glass eels that moved upstream depending on various conditions. Since the glass eels actively moved up the slope to river water rather than to reservoir water or tap water, the experiment was realized using river water. A significantly higher number of glass eels moved up during the spring tide than during the neap tide, and during night than during the day. Upstream movement was significantly higher during high tide than during low tide. Glass eels effectively moved up through a slope of less than 30℃and water-flow velocity lower than 0.4m/sec. The fish preferred a coarser ladder bed covered with small gravels, brush or carpet. 실뱀장어용 생태 어도를 설계하기 위하여 2008년 실뱀장어 소상 시기인 3~5월에 국립수산과학원 어군행동실험실에 실뱀장어가 소상하는 하구 및 하구둑과 어도를 재현하는모형 어도를 제작하여 다양한 소상 환경과 어도 조건에서실뱀장어의 소상행동을 관찰 분석하였다. 아래 해수조에 순치한 실뱀장어를 두고 위 담수조의 담수를 아래로 흐르게하면서 해수조에서 어도를 통해 담수조로 소상한 실뱀장어의 개체수를 비교하고, 실뱀장어의 소상 행동을 관찰하여최적 소상을 위한 적정 어도 조건을 추정하였다. 실뱀장어는 수돗물로는 소상하지 않았고, 저수지물보다 강물을 선호하였다. 실뱀장어 소상량은 소조기보다 대조기에 유의하게많았고(p⁄0.05), 낮보다 밤에 유의하게 많았다 (p⁄0.05). 실뱀장어 소상량은 저조위보다 고조위에서 유의하게 많았다 (p⁄0.05). 실뱀장어는 어도 경사면 길이가 짧을수록 소상량이 많았고, 경사도는 30℃이하가 효율적이었다 (p⁄0.05). 유속은 0.4 m/sec 이하로 물이 약하게 흐를 때 소상량이 많았다(p⁄0.05). 어도의 바닥은 솔, 자갈 및 카펫 등과같이 거친 재질에서 소상량이 유의하게 많았다(p⁄0.05).