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황종서 ( Hwang Chong Seo ),허협 ( Hur Hyub ) 한국농공학회 2000 韓國農工學會誌 : 전원과 자원 Vol.42 No.5
The fishways at Namdae-cheon and Osib-cheon were investigated from July 1998 through October 1999. There are three types of fishways on these rivers. Those are baffled fishway, fish ladder, and fish ladder with gabion. Namdae-cheon has 7 baffled fishways and 19 fish ladders, and Osib-cheon has 7 gabion fishways. On namdae-cheon, 1,775 fishes of 24 species were collected. Among these fishes, 452 fishes of 11 species were anadromous fishes occupying 46% in species and 25% in number. On Osib-cheon, 1,953 fishes of 24 species were collected. Among these fishes, 483 fishes of 5 species were anadromous fishes occupying 21% in species and 25% in number. On Namdae-cheon the species number and abundance decreased gradually upstream. The poor structure of fishways seems to have worked as an obstacle to the upstream migration of fishes in the Namdae-cheon. On Osib-cheon all the observed fish species except three-spined stickleback(Gasterosteus aculeatus aculeatus) which stay and spawn around downstream of fiver could migrate upstream. The good structure of fishways on this river is thought to have helped upstream fish migration.
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황종서 ( Hwang Chong Seo ),허협 ( Hur Hyub ) 한국농공학회 1999 한국농공학회 학술대회초록집 Vol.1999 No.-
The fishways on Namdae-cheon and Osib-cheon and the use of migratory fishes were investigated from July 1998 through June 1999. There are three types of fishways on these rivers. Those are baffled fishways, fish ladder, and fish ladder with gabion. Namdae-chcon has 7 baffled fishways and 19 fish ladder, and Osib-cheon has only fish ladder with gabion. On Namdae-cheon 1,195 fishes of 24 species were collected. Among these fishes 241 fishes of 9 species were anadromous fishes occupying 38% in species and 19% in number. On Osib-cheon 1,015 fishes of 24 species were collected. Among these fishes 240 fishes of 5 species were anadromous fishes occupying 21% in species and 24% in number. On Namdae-cheon the species number and abundance decreased gradually upstream. The poor structure of fishways seems to have worked as an obstacle to the upstream migration of fishes on Namdae-cheon. On Osib-cheon all the observed fish species except three-spined stickleback (Gasterosteus aculeatus aculeatus) which stay and spawn around downstream of river could migrate upstream. The good structure of fishways on this river is thought to have helped upstream fish migration.
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영암댐의 어도를 이용하는 회유성 어류 자원의 계절적 변화 연구
오철웅,황종서,박경양,송태곤 木浦大學校 沿岸環境硏究所 1999 沿岸環境硏究 Vol.16 No.1
영암호 통선겸용 갑문식 어도에서 총 30회의 어류 조사 결과 줄공치, 웅어, 숭어, 빙어, 전어 등 총 25종이 출현하였다. 어도의 출현 종은 계절별로 종조성, 개체수, 생체량에 있어서 크게 변동하는 것을 보여 주었다. 월별 총출현 종수는 6월에 12종으로 가장 많은 종이 출현하였으며, 다음으로 7, 8, 9월에 11종, 10월에 10종이었으며, 11월에 6종, 4월과 5월에 각각 5종으로 가장 적은 종수의 출현하였다. 종다양도지수 또한 6월에 1.048로 가장 높았으며, 11월에 0.346으로 가장 낮게 나타났다. 출현종의 개체수는 봄철이후로 전반적인 감소 경향을 보여 주었으며, 주요 우점종의 전체 개체수는 줄공치, 웅어, 빙어, 숭어의 순으로 나타났다. 생체량도 개체수의 변화와 마찬가지로 봄철이후로 전반적인 감소 경향을 보여 주었으며, 주요 우점종에 대한 전체 비율를 보면 웅어, 줄공치, 빙어, 숭어의 순으로 나타났다. 이러한 영암호 통선겸용 갑문식 어도에서 어도 이용 생물의 종조성, 개체수 및 생체량의 뚜렷한 계절적인 변화 (temporal variation)를 관찰 할 수 있었다. 이러한 결과는 계절별로 다양한 종들이 그들의 생활사의 일부 기간에 어도를 효과적으로 이용하고 있다는 것을 반영해 주었다. 우점종의 한종인 줄공치의 체장빈도분포 분석결과 줄공치는 두개의 연급군으로 이루어져 있으며, 두번째 연급군이 탁월 연급군이었다. 가입은 주로 여름철 (8월과 9월)에 일어났다. 이러한 결과는 줄공치가 치어기부터 성어기까지 어도를 이용하고 있다는 것을 지적해 주고 있다. Investigations were made on the temporal changes in species composition and species diversity, number of individuals and biomass of fishes in the fish way constructed at Young-am Dam. During the sampling period total 25 species were observed. Of these, dominant species were Hemiramphus kurumaeus, Coilia ectenes, Mugil cephalus, and Hypomesus olidus. Number of species was the most numerous in June (12) and the least in April and May (5). Similar results were found in the species diversity index (H'), which was 1.048 in June and 0.346 in November. There were variations in number of Individuals and biomass of fishes in the fish way, showing a gradual decline from summer to Autumn. This suggests that a variety of adult and larval fishes utilized in the fish way as a channel of migration in relation to their life history. Number of individuals (percentage of total number) was in the order of Hemiramphus kurumaeus (63%), Coilia ectenes (17%), Hypomesus olidus (15%), Mugil cephalus (5%) and biomass (percentage of total biomass) in the order of Coilia ectenes (51%), Hemiramphus kurumaeus (35%), Hypomesus olidus (7%), Mugil cephalus (4%). For one of the dominant species, Hemiramphus kurumaeus, length-frequency distribution showed that it consisted of two cohorts, with predominance in the 2nd cohort and recruitment occurred mainly in August and September, indicating utilization of fish way at various stages during its life history.
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