• Korean Journal of Environment and Ecology
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• v.18 no.3
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• pp.326-332
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• 2004

A study of freshwater ichthyofauna was conducted in order to clarify its significance at 14 upstream sites in Muju, Jangsu, Geochang and Hamyang districts in Deogyusan National Park, enclosing Baekdudaegan. The freshwater fish fauna of the Park was measured at the 14 sampling locations from May 2003 to September 2003. The fifteen species gauged included four Korean endemic species and or subspecies (Squalidus japonicus coreanus, Iksookimia longicorpa, Coreoperca herzi, Odontobutis platycephala). Fourteen species were found in the Keum River and seven species in the Nakdong River. However, common species were Punchocypris, Rhynchocypris oxycephalus, Zacco temmincki, Misgurnus anguillicaudatus, Coreoperca herzi, and Odontobutis pzatycephala. The dominant species of these regions were Zacco temmincki and Rhynchocypris oxycephalus. Past studies conducted in Baekdudaegan mostly concernedflora and vegetation. In the future, new study concepts for stream corridors involving both animal and plant should be introduced.

• Korean Journal of Ichthyology
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• v.4 no.2
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• pp.63-71
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• 1992

The Ichthyofauna was investigated at the seven sites in Paikchon streams from August 1990 to March 1991. The collected fishes were classified to 22 species belong to 19 genera and 11 families, of which 5 species were tentatively identified as endemic species in Korea. Three species, Odontobutis obscurus interrupta, Luciogobius guttatus and Mactopodus chinensis, are collected for the first time in this area. Dominant species were Squalidus gracilis majimae(40.8%), Zacco temmincki(24.2%), Z. platypus(13.3%) and Cobitis koreensis pumilus(7.7%). Stomach contents of S. gracilis majimae were mainly taxa belong to Bacillariophyceae of micro-algee attached to sand or gravel.

• Korean Journal of Ichthyology
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• v.26 no.4
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• pp.322-330
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• 2014

The fish species and groups were investigated at the four streams in Goseong from September 2011 to August 2012. During the survey period, 17 species from Goseong stream, 18 species from Maam stream, 20 species from Guman stream, and 15 species from Baedun stream of fish were collected. Four creek downstreams were classified into 2 groups which were categorized by the effects of seawater. Group A is Guman and Maam streams with no estuary barrage, with the exchange of freshwater and seawater. On the other hand, group B is Goseong and Beadun streams which was blocked by the estuary barrage and submerged weir. The former group was mainly consisted of peripheral freshwater fish species such as Tridentiger brevispinis, Gymnogobius castaneus, Mugli cephalus, and Acanthogobius flavimanus. The latter one was composed of primary freshwater fish species such as Zacco koreanus, Squalidus gracilis majimae, and Pseudorasbora parva. These results suggest that estuary barrage and submerged weir in the stream could change the natural flow of seawater and freshwater, resulting in change of fish species and groups.

• Korean Journal of Ichthyology
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• v.20 no.1
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• pp.36-44
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• 2008

Feeding habits of Micropterus salmoides were investigated from the stomach contents of specimens ranging from 13 to 511 mm in standard length (n = 419), which are collected in the Lake Okjeong, Korea, 2006 to 2007. M. salmoides is a very strong carnivorous fish eating living organisms such as lots of fishes, small amount of aquatic insects and shrimps. As they grow, the feeding habits changed : they fed mainly on Branchioda in 10 to 20 mm in SL., aquatic insects and small fishes in 30 to 50 mm in SL., fishes including Zacco platypus, Hemiculter eigenmanni and Rhinogobius brunneus over 50 mm. However, among the prey organisms, M. salmoides most preferred living fishes. Analysing ichthyofauna of the Lake Okjeong from 1981 to the present investigation, after and before introduction of M. salmoides, it was showed that there was a certain reduction in fish diversity. Consequently, it is likely to let the strongly fish-eating habit to reduce a diversity of native fishes in the lake.

• Nuclear Engineering and Technology
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• v.55 no.2
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• pp.707-716
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• 2023

The influence of waste technological waters of thermal and fast reactors of Beloyarsk NPP (Russia) on the accumulation of ⁶⁰Co, ⁹⁰Sr and ¹³⁷Cs in macrophytes and ichthyofauna of the cooling pond has been studied. Critical radionuclides, routes of their entry into the ecosystem and periods of maximum discharge of radioisotopes into the cooling pond have been determined. It is shown that the technology of electricity generation at the Beloyarsk NPP, based on fast reactors, has a much smaller effect on the release of artificial radionuclides into the environment. Therefore, during the entire period of monitoring studies (1976-2019), the decrease in the specific activity of radionuclides of NPP origin in macrophytes was 13-25800 times, in ichthyofauna 1.5-44.5 times. The maximum discharge of artificial radionuclides into the Beloyarsk reservoir was noted during the period of restoration and decontamination work aimed at eliminating the emergencies at the AMB reactors of NPP. The factors influencing the accumulation of artificial radionuclides in the components of the freshwater ecosystem of the Beloyarsk cooling pond have been determined, including: the physicochemical nature of radioisotopes, their concentration in surface water, the temperature of the aquatic environment, the trophicity of the reservoir, the species of hydrobionts.

• Proceedings of the Korea Water Resources Association Conference
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• 2015.05a
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• pp.573-577
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• 2015

인북천과 북천 유역의 어류상 및 수리구조물을 조사하고 이를 통해 수생태복원 및 어류의 이동로 확보를 위한 개선 방안을 연구하였다. 인북천 유역을 대상으로 수환경을 조사한 결과 어류의 서식에 영향은 없을 것으로 판단되나 강우 후 탁도 증가에 대한 대책은 필요할 것으로 사료된다. 인북천 유역 6개 하천을 대상으로 어류상을 조사한 결과 인북천은 총 24종 2,944개체가 채집되었으며, 우점종은 참갈겨니(30.7%)였고, 아우점종은 피라미(13.5%)인 것으로 조사되었다. 인북천 유역의 보 및 어도 현황을 분석한 결과 인북천과 북천 수계의 보는 총 57개소, 어도는 23개소로 어도 설치율이 40.4%인 것으로 조사되었으며, 집괴분석 결과 인북천과 북천의 소하천 또는 지류의 어류상은 본류와 분리되어 어류상복원을 위해서는 본류와 지류의 연결이 필요하므로 하천 연결 흐름을 방해하는 요소인 보를 제거하거나 어도의 조성이 필요할 것으로 사료된다.

• Korean Journal of Environmental Biology
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• v.19 no.4
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• pp.292-301
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• 2001

The ichthyofauna and fish community of the Gap stream water system were studied at 17 sites from March to December, 2000. It was confirmed the presence of 36 species,29 genera in 8 families. Twenty-five species in Cyprinidae was accounted for 69.4% of the total, four species in Cobitidae 11.1% of the total species number. The dominant species in the Gap stream water system was Zacco platypus (relative abundant 52.0%), the subdominant species was Carassius auratus (9.2%). The major dominant species in the each tributary of the Gap stream water system were Zacco platypus (Daejeon stream, 87.0%; Yoodeung stream, 41.5%; Gap stream, 47.5%). Number of Korean endemic species was 12 species in the Gap stream water system and that was a 24.5% of the total Korean endemic species. Ten rare species accounted for less than 0.3% of the total individual numbers. The mean species dominance, diversity and evenness indices of the fish community from the Daejeon stream were 0.76, 0.25 and 0.28, respectively: from the Yoodeong stream, 0.20, 0.65 and 0.83, respectively; from the Gap stream, 0.25, 0.83 and 0.77, respectively. The fish community of the Yoodeung stream was showed closer relationship to that of the Gap stream than to that of the Daejeon stream.

• Korean Journal of Ichthyology
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• v.13 no.1
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• pp.40-49
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• 2001

The ichthyofauna and fish community of the Dongjin River system were surveyed at 21 sites from October 1998 to September 1999. We confirmed the presence of 53 species in 14 families belonging to seven orders. Thirty-two species of cyprinid fishes accounted for 60.4% of the total, four species of cobitid and gobiid fishes 7.5% of the total, and two species of bagrid and centrarchid fishes for 3.8% of the total. The dominant species in the Dongjin River system was Zacco platypus (relative abundant 26.0%), the subdominant species was Carassius auratus (14.7%). The dominant and subdominant species in each stream of the Dongjin River system were determined. In the Dongjin River, the dominant species was Z. platypus (40.6%), the subdominant Acheilognathus lanceolatus (20.5%); in Wonpyeong stream, Pseudorasbora parva (22.6%) and Hypomesus olidus (13.2%); in Gobu stream C. auratus (67.5%) and Cyprinnus carpio (15.4%). Fourteen of the 53 species from the the Dongjin River system comprised 28.6% of the total Korean endemic species; seven rare species accounted for less than 0.1% of the total. Four exotic fish species were found: Cyprinus carpio (Islaeli carp), Carassius cuvieri, Micropterus salmoides and Lepomis macrochirus. The species dominance, diversity, and evenness index of the fish community from the Wonpyeong stream were 0.12, 1.08, and 0.91, respectively, indicating better conditions than those of the Dongjin River and the Gobu stream. The fish community of the Wonpyeong stream showed closer relationship to that of the Dongjin River than to that of the Gobu stream.

• Korean Journal of Ichthyology
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• v.26 no.1
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• pp.50-69
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• 2014

Freshwater fish fauna and community structure were investigated at thirty seven stations in the Yeong river, Nakdong river system, Korea from March to October 2013. During the surveyed period thirty nine species and two types belonging to thirteen families were collected. In this collection fishes of Cyprinidae were most numerous possessing 61.0% of all. There were seventeen Korean endemic species including Acheilognathus koreensis, two endangered species such as Koreocobitis naktongensis and Microphysogobio koreensis and two exotic species such as Oncorhynchus mykiss and Micropterus salmoides. Fish species transferred from other native rivers were three species such as Opsariichthys uncirostris amurensis, Pseudobagrus koreanus and Hypomesus nipponensis. Dominant species based on the number of individuals was Zacco koreanus NS (23.24%) and sub-dominant species were Z. koreanus NE (12.72%) and Z. platypus R (12.35%). The community analysis revealed that the structure of fish community in the Yeong river was very stable and diverse in having diversity 1.134, evenness 0.703, dominance 0.110 and species richness 4.348. Fish community was divided into four groups based on similarity indices among surveyed stations such as upper reach, mid-upper reach, middle reach and lower reach group.

• Korean Journal of Environment and Ecology
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• v.22 no.6
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• pp.616-624
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• 2008

The ichthyofauna and ecological community analysis in the Dong River, Korea, were investigated from May, 2006 to May, 2007. During the surveyed period, 31 species belonging 9 families were collected. Total of 31 species(primary freshwater: 26 species, peripheral freshwater: 5 species) were found with the primary freshwater fishes being highest. Dominant species was Zacco koreanus(55.73%), and subdominant species was Coreoleuciscus splendidus(7.15%). Also, Microphysogobio longidorsalis (6.12%), Hemibarbus mylodon(4.87%), Iksookimia koreensis(4.49%) were numerous. There were 19 Korean endemic species(61.29%), including Acheilognathus signifer, A. yamatsutae, Pseudopungtungia tenuicorpus, C. splendidus, Squalidus gracilis majimae, H. mylodon. Among them, 1 species was identified as qualifying for possible designation as a natural monument catergory, and 5 species were identified for designation required to protect under a wildlife category. As result of expected number of species according to rarefaction curve, the expected species of the Dong-river ranged from 19(51. 4, 5) to 22(51. 3) and result of similarity analysis ranged from 62.28%(51. 1 and 2) to 84.13%(51. 1 and 5). In conclusions, we could define that the Dong-river has a very good water conditions as habitat of fish, and habitat conditions also are very similar in every survey sites.