• 한국수산과학회지
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• 제47권5호
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• pp.645-653
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• 2014

We examined seasonal variation in fish species composition in coastal waters near Wolseong Nuclear Power Plant in the East Sea of Korea. A total of 72 species, 39 families, 14 orders, 46,214 individuals, and 4,639,667 g were collected. Glyptocephalus stelleri was the most dominant species by number of individuals (35%), followed by Clupea pallasii (26%). Liparis tanakai and Lophius litulon were the dominant species by biomass, accounting for 46% and 28%, respectively. We showed that bottom salinity and temperature are the most important environmental factors influencing fish species composition. Although bottom salinity did not differ statistically among seasons or stations, we detected some variation among stations. Additionally, bottom temperature differed among seasons and stations (P<0.05), affecting numbers of individuals and biomass. Thus, seasonal variation in fish assemblages can be classified into two groups: spring/summer and autumn/winter.

• 한국물환경학회지
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• 제25권6호
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• pp.951-963
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• 2009

The community structure and ecological characteristics of fish community in Lake Paldang were investigated from May to September 2008. During the survey period, 53 species belonging to 13 families were collected. Dominant species was Squalidus japonicus coreanus representing 81.8% of total number and 25.7% of total biomass of collected fish and subdominant species was Lepomis macrochirus representing 3.3% of total number and 18.9% of total biomass of collected fish. There were 20 Korean endemic species (38% of collected species number) including Cottus koreanus and 4 exotic species (7.5%) including Micropterus salmoides. The similarity analysis of fish communities among water areas of Lake Paldang using UPGMA showed that fish community of North-Han River was similar to that of South-Han River area and was different from that of Gyeongan River area. Long-term variation of fish community from 1972 to present study in Lake Paldang showed decrease of the species numbers after dam construction until 1994, and gradual increase from 1996 to present study indicating the disturbance of lentic system by dam construction in the 1980s. The increase of species number in the late 2000s may results in part from the increase of survey sites of successive studies. L. macrochirus which was designated as a domestic ecosystem-disturbing alien species with wide food niche have shown more than 20% of relative abundance since 1996 indicating the adverse effect on not only fish community but also aquatic ecosystem food web of Lake Paldang.

• 생태와환경
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• 제43권1호
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• pp.69-81
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• 2010

흑천수계를 구성하는 흑천 6개의 본류 및 14개의 지류 하천을 대상으로 어류군집의 분포특성을 분석한 결과, 총 9과 26종의 서식이 확인되었으며, 이 중 Cyprinidae 어류가 15종으로 다양하게 분포하였다. 흑천수계에서 우점종은 갈겨니 (29%), 피라미 (22%), 버들치 (21%) 등의 순으로나타났다. 또한, 흑천 본류에서 이들 우점종의 분포특성은 최상류역은 버들치, 상류역은 갈겨니, 중-상류역은 갈겨니, 피라미, 중-하류역은 피라미에 의해 하천특성이 결정되는 것으로 나타났다. 서식이 확인된 어류 중 한국고유종은 한강납줄개 등 7과 13종 (50%)로 고유종의 구성비가 높게 나타나 한반도 평균적인 고유종 빈도인 23%에 비해 매우 높은 것으로 나타났다. 하천차수별 어류의 분포특정은 하천차수가 증가할수록 종수 및 개체수가 증가하는 것으로 경향을 보였는데 이는 하천크기의 영향보다는 지점간의 이격거리 및 지류하천의 지리적 위치에 따른 차이가 어류 분포에 있어서 더 많은 영향을 주는 것으로 사료되었다. 또한, 내성도 빛 트로픽 길드를 분석한 결과에서는 하천차수가 증가함에 따라 민감종 및 충식종은 다소 감소하는 경향을 보이는 것으로 분석되였으며, 내성종 빛 잡식종은 하천차수가 증가함에 따라 증가하는 경향을 보이는 것으로 분석되었다. 특히, 민감종 및 충식종 비율이 50% 이상 되는 구간들이 많은 것으로 분석되어 혹천수계가 하천의 자연성 및 서식환경의 보존가치가 높은 수계로 사료된다.

• 한국환경생태학회지
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• 제34권2호
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• pp.142-156
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• 2020

한강지류 경안천의 어류 군집 특성을 밝히기 위해 2017년 4월부터 10월까지 조사를 실시하였다. 조사기간 동안 48개 지점에서 족대와 투망으로 채집된 어류는 11과 40종이었다. 우점종은 피라미(Zacco platypus, 48.0%), 아우점종은 버들치(Rhynchocypris oxycephalus, 17.7%), 그 다음으로 돌고기(Pungtungia herzi, 6.8%), 참갈겨니(Zacco koreanus, 5.0%), 붕어(Carassius auratus, 4.3%), 긴몰개(Squalidus gracilis majimae, 2.7%), 떡납줄갱이(Rhodeus notatus, 2.5%) 등의 순으로 우세하게 출현하였다. 출현종 중 한국고유종은 14종(35.0%)이었고, 외래종은 배스(Micropterus salmoides), 블루길(Lepomis macrochirus), 이스라엘잉어(Cyprinus carpio Islaeli type) 3종, 육봉형 어류는 은어(Plecoglossus altivelis), 밀어(Rhinogobius brunneus), 둑중개(Cottus koreanus) 3종, 기후변화 민감종으로 둑중개 1종이 채집되었다. 군집분석 결과 우점도는 최상류 지점들에서 높았고, 다양도와 풍부도는 상류지점이 낮고 하류 지점으로 갈수록 높아지는 경향을 보였다. 군집구조는 크게 하천(최상류, 상류, 중·하류)과 호수로 구분되었다. 하천건강성은 좋음(23지점, 47.9%), 보통(15지점, 31.3%)의 비율이 높았다. 과거조사와 비교한 결과, 선행조사에서 출현하였으나 본 조사에서 출현하지 않은 종은 12종, 본 조사에서 처음으로 출현한 종은 9종이었으며, 생태계 교란종으로 지정된 배스와 블루길은 점차 확산되는 경향을 보였다.

• 한국어류학회지
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• 제22권3호
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• pp.168-178
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• 2010

2006년 2월부터 10월까지 남해 거문도 연안의 암반초와 비 암반 정점의 어류 종조성을 비교 분석하였다. 어류자료는 밤에는 삼중자망으로 수집하였고, 낮에는 스쿠버 잠수관찰로 수집하였다. 조사기간 동안 세 정점에서 삼중자망에는 총 40종, 380마리, 71,426.9 g의 어류가 채집되었다. 어획된 어종 가운데 전갱이가 최우점하였으며, 그 외 홍어, 노랑가오리, 쥐치, 전기가오리, 참돔, 볼락, 꼬치고기 등이 많이 채집되었다. 암반 초 정점에서는 26종, 264마리, 46,776.7 g의 어류가 채집되었고, 우점종은 전갱이이었다. 다음으로 비 암반 정점 1에서는 17종, 45마리, 10,535.1 g의 어류가, 비 암반 정점 2에서는 19종, 71 마리, 14,115.1 g의 어류가 채집되었다. 스쿠버 다이빙에 의한 3정점 잠수조사에서는 13종, 1,749마리의 어류가 관찰되었다. 주로 관찰된 어종은 자리돔이며, 기타 범돔, 쥐치, 망상어, 육동가리돔, 뱅에돔, 용치놀래기, 노래미, 쥐돔, 볼락, 혹돔 등이 관찰되었다. 암반초에서 어류의 풍도는 어종수 7종, 개체수 1,739마리이며, 이는 전체의 99.4%를 차지하는 것이다. 거문도 해역에서 어류군집은 많은 암초성 어류들을 포함하고 있었지만, 전갱이, 고등어 같은 회유성 어종들도 다량 포함하고 있었다. 또한 암반초에서 어류의 풍도는 다른 비암반 정점들에 비해 높았으며, 암초성 어종이 대부분을 차지하였지만 낮과 밤 간에 우점종은 차이가 있었다. 결과적으로, 거문도 해 역의 높은 어류 풍도는 암반초와 같은 물리적 구조물과 관련이 있었으며, 이는 암반초지역이 많은 어류에게 주요 서식처의 하나가 될 수 있음을 시사하는 것이다.

• 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.

• Parasites, Hosts and Diseases
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• 제58권6호
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• pp.701-707
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• 2020

A survey was performed to investigate the infection status of zoonotic helminth larvae in fish from a local market of North Dagon District in Yangon City, Myanmar. A total of 486 fish in 13 species were collected 8 times from December 2015 to December 2019. All fish were transported under ice to a laboratory in Korea and examined for helminth larvae using artificial digestion method. Larval gnathostomes and metacercariae of more than 8 zoonotic trematode species, i.e., Opisthorchis viverrini, Haplorchis taichui, H. pumilio, H. yokogawai, Centrocestus spp., Stellantchasmus falcatus, Pygidiopsis cambodiensis, and Procerovum sp., were detected. Larval gnathostomes were found in 58 (16.0%) out of 362 fish of 6 species, with mean intensity of 2.8 per fish infected. Metacercariae of O. viverrini were detected in 10 (2.9%) out of 349 fish of 5 species, with mean intensity of 16.9 per fish infected. Metacercarial prevalences of 4 intestinal flukes, H. taichui, H. pumilio, H. yokogawai, and Centrocestus spp., were 16.8%, 26.0%, 12.5%, and 15.0% in the positive fish species, respectively, and mean metacercarial intensity was 63.3, 26.8, 86.2, and 8.7 per fish infected. Metacercariae of S. falcatus and P. cambodiensis were detected only from the mullet, Chelon macrolepis. Metacercariae of Procerovum sp. were found in Channa striata and Anabas testudineus. Collectively, it was confirmed that the fish were infected with gnathostome larvae and metacercariae of O. viverrini and intestinal flukes in Yangon City, Myanmar.

• Parasites, Hosts and Diseases
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• 제56권5호
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• pp.509-513
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• 2018

Present study was performed to survey infection status of digenetic trematode metacercariae in 2 alien fish species, Micropterus salmoides (largemouth bass) and Lepomis macrochirus (bluegill), in 2 rivers draining Chungcheongbuk-do, Republic of Korea. A total of 107 largemouth bass and 244 bluegills were caught in Daecheong-ho (ho=lake) and Musim-cheon (a branch of Geum-gang), in Chungcheongbuk-do April-July 2015. Additionally, 68 native fish of 5 species, i.e., Zacco platypus, Hemibarbus longirostris, Carassius auratus, Pseudogobio esocinus and Puntungia herzi, were caught from the same water bodies. All of the fish collected were examined by artificial digestion method. The metacercariae of Centrocestus armatus, Clinostomum complanatum, Metagonimus sp. and Diplostomum spp. were detected from 4 out of 5 native fish species in Daecheong-ho. However, any metacercariae were not found from 87 M. salmoides and 177 L. macrochirus in Daecheong-ho. In Musim-cheon, metacercariae of Exorchis oviformis and Metacercaria hasegawai were detected from 78% Z. platypus and 34% L. macrochirus, but any metacercariae not found in M. salmoides. We report here that the 2 alien fish species were less infected with the metacercariae than the native ones. Surveys on the metacercariae in the alien fish species in geographically various rivers should be undertaken for better understanding on the role of alien fish species in the trematode infections in Republic of Korea.

• 환경영향평가
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• 제20권5호
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• pp.757-764
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• 2011

This study is performed to clarify the fish fauna and fish habitat of downstream of Singok submerged weir within Han River estuary during April ~ December 2009. It was studied at the nine sites of Han River estuary area. The three of them were located in the mainstream of Han River and six of them were located in three wetlands which as Sannam, Janghang and Dolbangguji. Total fish fauna was identified as 9 order 15 family and 38 species (2,230 individuals). It was divided as 8 order 11 family 28 species from three sites in the mainstream of Han River and as 5 order 8 family 19 species in waterways at mud flats of three wetlands. It was made up the fish fauna as 3 order 4 family 12 species during the survey period at the waterways in the rice paddies. Hemibarbus labeo was dominant species in the whole research sites and waterways at mud flats. Carassius auratus was dominant species in the waterways between rice paddies and Chelon haematocheilus was dominant species in mainstream of Han River estuary.

• 한국수산과학회지
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• 제47권5호
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• pp.659-666
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• 2014

Our aim was to compare the community structure of fish in the coast of Wando Island between 2001 and 2013. Using a gape net with wings, we collected 61 taxa, wherein the most dominant species was Engraulis japonicus. The sea temperature in the middle layer of the survey station in 2001 (after June) was obviously higher than that in 2013, which was < $20^{\circ}C$. Except for Thryssa kammalensis in 2013, the log transformed individuals of seven dominant species, selected using a SIMPER (similarity-percentages procedure) analysis, decreased. Decreases in the individuals of Gobiidae spp., the warm-water species Trichiurus japonicus and Conger myriaster, and the migratory species Syngnathus schlegeli, Setipinna taty and Sardinella zunasi, which arrive in the southern coastal waters of Korea during summer-autumn, could be due to decreasing sea temperature in 2013. Thus, fish species diversity, estimated from rarefaction and k-dominance curves, declined in the coastal waters of Wando Island from 2001 to 2013, resulting in a significant difference in fish community structure.