• 한국농공학회지
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• 제42권5호
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• pp.70-77
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• 2000

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 baffied 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.

• 한국수산과학회지
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• 제48권4호
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• pp.507-528
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• 2015

The Fish Collection Project collected 356 fish species from the Southern Sea of Korea during 2010-2012, 55 more than previously collected. The fishes belonged to 3 classes, 29 orders and 128 families. The 5 dominant orders, Perciformes, Scorpaeniformes, Pleuronectiformes, Tetraodontiformes, and Clupeiformes, accounted for ~80% of the identified species. Additionally, 126 species were collected from the Southern Sea for the first time, while 85 species that had been found in previous collections were not seen. The species variety of fish in the Southern Sea may be influenced by its unique oceanographic conditions such as increased water temperatures in coastal areas, so regular surveys would assist our understanding of the fish community. We suggest that various collection methods, including diving, be used to collect fish species inhabiting rocky shore or deep-sea areas, where commercial fishing gear is difficult to deploy.

• 한국수산과학회지
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• 제35권4호
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• pp.366-379
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• 2002

가덕도 주변 해역에 서식하는 어류의 종조성과 계절 변동을 파악하기 위해 1998년 1월부터 12월까지 삼각망을 이용하여 어류를 매월 소조기에 채집하였다. 조사 기간 동안 채집된 어류는 69과 136종이었다. 전갱이 (Trachums japonicus), 전어 (Konosirus pu-nctatus), 숭어 (Mugil cephalus)가 우점하였는데, 이들 어종이 전체 채집 개체수와 생체량의 $63.7\%$와 $83.1\%$를 차지하였다 그밖에도 주둥치 (Leiognathus nuchalis), 복섬 (Takifugu niphobles), 고등어 (Scomber japonicus), 갈치 ( Trichiurus leptrus), 등줄숭어 (Chelon afnnis), 열동가리돔 (Apogon lineatus), 수조기 (NibeaalbiHora), 감성돔 (Acanthopagrus schlegeli) 등이 비교적 많이 채집되었다 채집 종수는 여름에 많았고 겨울에 적었다. 채집량은 봄에 높은 값을 보였으며, 겨울에 낮은 값을 보였다. 종다양도지수는 다른 계절에 비해 봄에 낮은 값을 보였다.

• 한국수산과학회지
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• 제47권6호
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• pp.1055-1062
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• 2014

Hydroacoustic surveys were conducted for spatio-temporal distribution and size estimation of fish in the Yongdam reservoir, Korea, from April to July 2014. Acoustic data were collected along acoustic transects using a 120 kHz scientific echosounder. The received acoustic data were the in situ acoustic target strength (dB) and nautical area scattering coefficient ($m^2/mile^2$). Data on fish behavioral patterns and size were collected using a DIDSON acoustic camera at stationary stations. Fish were mainly distributed in the center channel and close to the outer Yongdam reservoir. Acoustic density of fish in the summer season were higher than in the spring season. The seasonal vertical distribution pattern of fish aggregations may be strongly related to the vertical temperature structure. The size distribution of fish obtained from an acoustic camera correlated well with the acoustic size of fish from an echosounder.

• 생태와환경
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• 제55권4호
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• pp.285-293
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• 2022

어류 채집도구는 다양하며, 채집도구의 선택과 특성에 따라 채집되는 어류의 군집에 차이가 나타난다. 본 연구는 예당호에서 4개의 채집도구 (족대, 투망, 자망 및 삼각망)를 이용하여 어류 군집을 조사하고 비교하였다. 족대와 투망은 개체수를 채집하는 데 효율적이지 않았으나, 수변부에 서식하는 어류의 종 다양성이 높았다. 자망의 경우, 체장이 길거나 등지느러미 극조가 존재하는 어류가 주로 채집되었다. 삼각망에서는 가장 많은 개체수가 채집되었으며, 높은 종 선택성으로 인해 우점도가 높아지는 것으로 나타났다. NMDS 분석에서 족대, 투망 및 자망 간 채집되는 어류의 뚜렷한 차이가 나타났다. 비지도학습법인 Self-organizing map (SOM) 분석으로 자망에서는 체장이 큰 어류가 채집되는 반면 삼각망에서는 체장이 작은 어류가 채집되는 패턴 특성을 밝혀내었다. 채집도구에 따라 어류의 생태적인 특성과 종 다양성 효율이 다르게 나타났으며, 어류 군집조사 시 서식환경과 목적에 부합되는 채집도구를 선택할 필요성이 있다. 또한, 서식처 유형에 적합한 채집도구의 표준화로 연구자 간의 차이를 줄이는 방법의 제시가 요구된다.

• Journal of Applied Biological Chemistry
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• 제57권2호
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• pp.131-136
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• 2014

An attempt was made to assess metal ionic toxicity levels of different fishes in the polluted rivers viz., Buriganga and Turag. Fish samples collected from two polluted rivers were analyzed for the levels of metals such as Cd, Cr, Cu, Mn, Pb, and Zn in order to elucidate the status of these contaminants in fish meant for human consumption. The detected concentrations of Cr, Cu, Mn, and Zn ions in fish species collected from the polluted rivers were below the toxic levels and did not appear to pose a threat. Among the analyzed metals, Cd and Pb ions were detected above the permissible levels in liver and muscle tissues of stinging catfish (Heteropneustesfossilis), spotted snakehead (Channapunctata) and wallago (Wallagoattu) collected from the polluted rivers causing toxicity for human consumption. Stinging catfish (Heteropneustesfossilis) was the species found to highly bioaccumulate these metals. Fish species bioconcentrated appreciable amounts of Cd and Pb as toxic metals in the liver as compared to the muscle. Levels of these toxic metals varied depending on different tissues in fish species.

• 수산해양기술연구
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• 제55권3호
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• pp.233-242
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• 2019

Species composition and yearly variation of fish eggs and larval fishes were investigated from 2014 to 2016. During the study period, the fish eggs were identified as belonging to 14 taxa. The dominant species of fish eggs were Leiognathus nuchalis, Engraulis japonicus, and Konosirus punctatus. These three species accounted for 97.4% of the total number of individuals collected. The collected larval fishes were identified into 37 taxa, 22 families, and seven orders. The dominant species of larval fish were Leiognathus nuchalis, and Gobiidae fishes. These three species accounted for 85.4% of the total number of individuals collected. The diversity index of the larval fishes was the highest in 2014 (H' = 1.60) and the lowest in 2015 (H' = 1.15). The evenness index was the highest in 2016 (J = 0.51) and the lowest in 2015 (J = 0.39). The dominance index was the highest in 2015 (D = 83.5%) and the lowest in 2016 (D = 70.9%). In addition, the economically important species in this area were Engraulis japonicus, Konosirus punctatus, Hippocampus coronatus, Sebastes schlegelii, Acanthopagrus schlegeli, and Cynoglossus joyneri.

• 한국수산과학회지
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• 제36권3호
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• pp.298-305
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• 2003

Seasonal variation in species composition of fish in the estuary of Saemangeum water in the western coast of Korea was determined using seasonal samples collected by an otter trawl from April 2001 to February 2002. Species compositions did not differ significantly among the 4 stations (p>0.05, Wilcoxon signed-rank test). The cumulative number of species and species diversity (H') approached asymptote after four 30-min trawl hauls. Therefore 30-min trawl samples from each of the four stations were pooled to represent each season. A total of 45 species 2758 individuals and 30,346.8 g of fish were collected during the study period. Of the fish collected Leiognathus nuchalis, Synechogobius hasta, Neosalanx jordani, Konosirus punctatus and Chaeturichthys stigmatias predominated in abundance accounting for $68\%$ of the total number of individuals. Seasonal variation of fish abundance showed a similar trend to those of the other western coastal waters of Korea. The resident species were collected only in spring and autumn. Number of species and biomass were highest in summer due to the catch of many migrating species. In winter catch amount was low, and only 7 species were collected.. Brackish water fishes were more abundant in the study area, and Johnius grypotus and Cynoglossus joyneri were not premominated compared to the other coastal waters. This difference in species compositions may be related to the lower salinity in this estuarine habitat than in the other western coastal waters of Korea.

• 한국어류학회지
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• 제24권3호
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• pp.191-200
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• 2012

경남 통영 풍화 잘피밭에서 2010년 11월부터 2011년 10월까지 예인망(surf net)으로 채집하여 어류의 종조성 특성을 조사하였다. 조사기간 동안 총 30종, 5,511개체, 6,933.4 g의 어류가 채집되었다. 우점종은 베도라치(Pholis nebulosa), 실고기(Syngnathus schlegeli), 그물코쥐치(Rudarius ercodes), 가시망둑(Pseudoblennius cottoides), 볼락(Sebastes inermis), 실비늘치(Aulichthys japonicus)로 총 출현 개체수의 93.4%를 차지하였다. 출현한 대부분의 어류는 크기가 작거나 대형 어종의 유어들로 이루어져 있었다. 잘피의 밀도는 2011년 4월이 가장 높았으며 2011년 1월이 가장 낮았다. 수온과 잘피의 밀도 및 중량, 주 먹이생물의 양적 변동이 어류 군집의 계절변동에 영향을 미치는 것으로 나타났으며, 풍화 잘피밭이 많은 어종들에게 좋은 성육장의 역할을 하고 있는 것으로 생각된다.

• 한국수산과학회지
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• 제36권4호
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• pp.378-388
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• 2003

Seasonal variations in abundance and species composition of fish assemblage around Narodo were examined. Fish samples were monthly collected by a beam trawl from December 2000 to November 2001. A total of 62 fish species representing 37 families were collected. Of these, Thryssa kammalensis, T. hamiltoni, Chaeturichthys hexanema, Johnius grypotus, Leiognathus nuchalis, Cynoglossus robustus and Setipinna taty were dominant species comprising $82\%$ of the total number of individuals. Species diversity indices ranged from 1.2 to 2.2 showing the highest values from September to November 2001. The fish assemblage was divided into three different groups by cluster analysis of the fourteen dominant species. The main residence species were J. grypotus, L. nuchalis, C. hexanema, C. robustus, Setipinna tenuifilis, T. kammalensis and Ctenotrypauchen microcephalus. Of the temporal species T. hamiltoni, Liparis tanakai and Erisphex pottii were collected In spring, and Muraenesox cinereus and Trichiurus lepturus were in summer and autumn. Principal component analysis revealed that seasonal variation in the fish assemblage was attributed to the abundance of temporal species due to seasonal variation of environmental factors such as water temperature and ecological pattern (polagic/demersal) of fish species.