• Korean Journal of Ichthyology
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• v.10 no.1
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• pp.67-76
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• 1998

The ichthyofauna and the structure of fish community were surveyed from April to November 1997 at eighteen stations in the Yonggang river which is a first tributary located at the middle reach of the Nakdong river system. During the surveyed period, 32 species belonging to ten families were collected. Of them cyprinid fish occupied 53.1% (17 species) and cobitid fish 15.6% (5 species). Thirteen species (40.6%) were known as Korean endemic species. Dominant species were Zacco temmincki (32.78%) and Moroco oxycephalus (15.10%). Zacco platypus, Pungtungia herzi. Niwaella multifasciata, and Odontobutis platycephala were common species. Rare species which occupied less than 0.1% of total individuals were Lampetra reissneri, Pseudorasbora parva, Squalidus chankaensis tsuchigae, Microphysogobio koreensis, Gobiobitia naktongensis, Cobitis rotundicaudata, Nemacheilus toni, Silurus asotus, Silurus microdorsalis, Siniperca scherzeri, and Oreochromis niloticus. A tendancy were shown in regional distribution that Moroco oxycephalus dominated in upper stream, Zacco temmincki and Moroco oxycephalus in mid - upper stream, Zacco temmincki and Niwaella multifasciata in mid - lower stream, and Zacco platypus and microphysogobioid fishes in lower stream. St. 11 which located in mid- reach of Yongam stream and St. 15 and 18 which located in main stream had the most stable and diverse community structure, but St. 1, 5, and 7 were unstable and the simplest community structure.

• Korean Journal of Environmental Biology
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• v.27 no.4
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• pp.397-405
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• 2009

We assessed the physical habitat conditions of pale chub (Zacco platypus) considering various stream order in the Geum river basin. Field monitoring was conducted for ecological and habitat conditions for 28 sites from October 2007 to October 2008. The number of Z. platypus sampled during this period was 2,362. In more than 3rd stream, water depth and velocity showing the highest number of samples were 0.8 m and $0.8\;m\;s^{-1}$, respectively. In addition, the highest number of samples was observed under the condition of total length (TL) (8~10 cm), velocity ($0.3\;m\;s^{-1}$), water depth (0.4 m), substrate size (send, 0.1~1.0 mm~coarse gravel, 50.0~100.0 mm) and habitat type (run). Based on the monitoring data (n=1059) the relationship between body weight (BW) and TL in male and female were estimated as $BW=0.0068{\times}TL^{3.0274}$ ($r^2=0.9102$) and $BW=0.0075{\times}TL^{2.9995}$ ($r^2=0.8517$), respectively. Growth equations on days after parturition (DAP) to the TL were estimated as TL=0.0108DAP+1.5795 ($r^2=0.9721$). By equations (TL 6.9 cm), BW were 2.7 g (male) and 2.4 g (female), and DAP was about 490 days.

• Korean Journal of Environment and Ecology
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• v.29 no.6
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• pp.873-883
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• 2015

From August 2012 to April 2013, the ichthyofauna and post-restoration properties of Yangjae stream were investigated. A total of 1,503 fish of 2 forms, 16 species and 5 families were studied during the survey period. A survey of the distribution of freshwater fish inhabiting Yangjae stream after restoration of the stream showed large populations of Zacco platypus and Rhynchocypris oxycephalus. From the frequency distribution of the total length for the Zacco platypus population inhabiting Yangjae stream, it was estimated that there are 4 distinct age groups, with an abundance of the 27-63 mm (Age $0^+$) category accounting for 51.3% of the population. The regression coefficient (b) for the length-weight relationship in Zacco platypus was 3.27, while the slope of the condition factor was positive, demonstrating that stable growth conditions are being maintained. Analysis of tolerance and trophic guilds showed a decrease in the numbers of sensitive species and insectivore species further downstream, and an increase in tolerant species and omnivore species. Principal component analysis using community indices and indices of biotic integrity (IBI) showed that there were differences according to the survey time: the first and second surveys showed major changes on certain single species populations while during the third survey, it was analyzed that the populations of various types of fish had established balance.

• Korean Journal of Environment and Ecology
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• v.27 no.2
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• pp.230-240
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• 2013

The fish fauna and population characteristics of Zacco platypus at the 9 habitat types in the Hongcheon River were investigated from August, 2009 to April, 2010. The collected species during the surveyed period were 21 species belong to 6 families. Korea endemic species were Acheilognathus signifer, Microphysogobio longidorsalis, Pseudopungtungia tenuicorpa, Squalidus gracilis majimae, Zacco koreanus, Iksookimia koreensis, Silurus microdorsalis, Liobagrus andersoni, Coreoperca herzi, Odontobuitis interrupta, and Odontobuitis platycephala which showed 61.9% ratio of total species. Dominant species was Z. koreanus, and subdominant species was Z. platypus. Dominant species according to habitat types were Z. platypus(in side channel, substrate type pool, and riffle), Z. koreanus(channel connected pool, run, meander type pool, and rock type pool), M. yaluensis( dam type pool ) and Rhynchocypris oxycephalus(channel unconnected pool). Length-weight relationship in the population of Z. platypus was 3.27 in regression coefficient(b). Principal component analysis was classified as 2 groups. Bray-curtis cluster analysis indicated that the channel connected pool and meander type pool showed the most similar values(66.2%), whereas side channel and channel unconnected pool exhibited the most distance values(32.1%).

• Korean Journal of Ecology and Environment
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• v.50 no.4
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• pp.403-410
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• 2017

We collected fishes at the 12,873 sites in stream order (1~7) from 2008 to 2016. In the results, two populations(Zacco platypus and Zacco koreanus) represented distributional differences in the stream order gradient, and correlation analysis showed that the two populations had a potential competitive relationship. The ecological characteristics of the fish except for the Z. platypus and the Z. koreanus, according to the gradient of stream order showed a pronounced gradient in the species such as intermediate species, sensitive species, carnivores, herbivores and omnivores. The two populations showed a high correlation between intermediate species, sensitive species of the tolerance guild and omnivores, insectivores of the trophic guild. Fish assessment index (FAI) was negative relation with stream order. According to the stream order gradient, the two populations showed different correlations with FAI.

• Parasites, Hosts and Diseases
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• v.31 no.4
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• pp.331-340
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• 1993

This study investigate the epidemiological feature of Metagonimus infection in Kangwon-do (province). The average Infection rate of the surveyed inhabitants was 7.8% (83 positives out of 1, 067 examinees) by stool examination; male, 11.4% and female, 3.2%, respectively. The egg positive rate in residents in the Som river area was 7.3%, that of the Chuchon river area 6.3%, the Pyongchang river area 12.8%, the Tong river area 3.8%, the Hongchon river area 9.8%, and the Ohsip stream area of Samchok 8.0%,respectively. The average metacercarial infection rate of genus Metagonimus in the fish was 81.0% (256 positives out of 318 fish). The infected fleshes were Zacco platypus. Zacco teminki, Opswiichthys biens, Squdidis sp., Corqssius carassius, etc. in western Kangwon-do Meanwhile, in the Ohsip stream area of Samchok-gun, eastern costal Kangwon-do, the infected fish were Plecoglossus altivelis and Tribolodon hokonensis. The rats and dogs are infected with the metcercanae obtained from Zacco platypus and Opsariichthys biens, adult worms collected were Miyata type of Metagonimus with some M. takahashii. When infected with metacercariae from Plecoglossus ltivelis, Metagonimus yokogowai was only found. M. yoogawai and Metagonimus Mlyata type were fecund together in Tribolodon hakonenis in Ohsip stream area of Samchok, in the eastern Kangwon-do. The intestinal flukes of genus Metogonimus in western Kangwon-do were Miyata type of MetQnonimuT and M. takahashii transmitting mainly by Zacco platypus and Opsariichtys bidens as a source of infection. In the eastern part of Kangwon province (Ohsip stream area of Samchok), M. yokogowai was mainly distributed by P. altivelis and T. hakonesis, but some T. hakonensis harbored the metacercariae of Miyata type of Metagonimus with those of M. yokogawai.

• Korean Journal of Ichthyology
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• v.4 no.2
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• pp.55-62
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• 1992

Study on the fish fauna of the Chuam Dam in Sungju-gun, Chollanamdo, Korea was conducted from March 1990 to October 1990. Twenty-eight species belong to 23 genera and 11 families have been collected at five areas within the dam. The dominant species were Zacco platypus, Acheilognathus limbata and Zacco temmincki. Among the collected fishes, 5 species were known to be endemic species in Korea. They were Acheilognathus yamatsutae, Sarcocheilichthys variegatus wakiyae, Coreoleuciscus splendidus, Microthysogobio yaluenis, Cobitis longicorpus, Pseudobagrus koreanus, Liobagrus mediadiposalis and Odontobutis platycephala. The frequencies occurrence were 86.71% for 5.2% for Cyprinidae and Osmeridae.

• Journal of Korean Society on Water Environment
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• v.27 no.6
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• pp.822-829
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• 2011

The purpose of the present study is to estimate the ecological instream flow for conservation and restoration of fish habitat in running water ecosystem which has very important status for stream environment. Estimation of the ecological instream flow in the present study was carried out by application of a two-dimensional depth averaged model of river hydrodynamics, River2D model. It can model fish habitat in natural streams and rivers and assess the quality of physical habitat accoriding to the species preferences for habitat suitability. Zacco platypus and Zacco temmincki were selected as target fish species in the study area of the Seomjin river. The Habitat Suitability Criteria (HSC) developed by Sung et al. (2005) were used for target fish species, life stages and habitat conditions in the study. Weighted usable area (WUA) was computed by the River2D model considering preferences of target fish species for velocity, depth, and channel substrate. The result revealed that the ecological instream flow of $10.0m^3/s$ is needed to maintain the target fish habitat at each life stage in the river.

• Korean Journal of Environmental Biology
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• v.22 no.1
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• pp.111-119
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• 2004

The ichthyofauna and community structure in Lake Paro, Korea, was investigated from December 2002 to september 2003. Buying the surveyed period 45 species belonging 12 families were collected. There were 15 Korean endemic species 33.33％, including Hemibarbus mylodon, Aeheilognathus yamatsutae nnd Ooreoperca hem. Dominant species were Zacco platypus (72.41％) and subdominant species were Hemibarbus labeo (9.75％). Also, Opsariichthys uncirostris amurensis (5.98％), Zacco temmincki (2.42％), Rhinogobius brunneus (2.01％) and Hypomesus olidus (0.88％) were numerous. The biomass of collected fishes were Zacco platypus (82,803.15 g), Hemibarbus labeo (32,942.63 g), Opsariichthys uncirostris amurensis (27,482.39 g), Cyprinus carpio (6,502.87 g), Anguilla japonica (3,022.15 g) and Siniperca scherzeri (2,711.05 g). Of the 10 introduced fishes in Lake Paro Cyprinus carpio (Israeli type), Carassius cuvieri, Micropterus salmoides and Lepomis macrochirus were originated form foreign countries but Anguillta japonica, Hemiculter eigenmanni, Hypomesus olidus, Oncorhynchus masou mason, Chaenogobius urotaenius, Rhinogobius giurinus were introduced from other native river systems.

• 한국전자현미경학회:학술대회논문집
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• 1995.06a
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• pp.36-37
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• 1995