• Parasites, Hosts and Diseases
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• v.32 no.4
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• pp.267-270
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• 1994

To evaluate the status of clonorchiasis and metagonimiasis of the inhabitants near Talchongang (River) in Chungwon-gun, Chungchongbuk-do, the stools of 67 inhabitants were examined by formalin-ether sedimentation method from August to September, 1993. Also freshwater knish caught in Talchongang were examined by slide compression method. The e99 positive cases of Clonorchis sinenis and Metasonimus sp. were 22 (32.8%), and 14 (20.9%), respectively. Of 17 species of examined fish, 14 species were infected with C. sinensis and 13 species with Metagonimus sp. The adult worm collected from 2 patients after treatment with praziquantel was Metosoninur Miyata type. Also the adult worm obtained from the experimental mice infected with metacercariae from Zacco plntwpus was Metafonimus Miyata type. We found the highly endemic area of clonorchiasis and metagonimiasis along Talchongang.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2003.05a
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• pp.322-323
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• 2003

연쇄구균병은 담수어 및 해산어에 패혈증을 일으켜 양식산업에 막대한 피해를 주는 질병이다. 해산양식어류인 방어(Kusuda et al., 1976; Minami, et al., 1979), 넙치(Nagatsugawa, 1983; Heo et al., 2001), 터봇(Domenech et al., 1996), gilthead sea bream 및 European sea bass (Zlotkin et al., 1998a) 등의 연쇄구균병에 관한 연구가 활발히 진행되고 있고, 특히 최근에는 PCR에 의한 신속진단 및 동정에 관한 연구가 이루어지고 있다(Aoki et al., 2000; Lee et al., 2001; Nguyen et al., 2002). (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.05a
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• pp.283-284
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• 2001

은어(Plecoglossus altivelis)는 우리나라 담수어 중 양식어로서 널리 알려져 있다. 은어는 은빛나는 고기로서 수박향내가 난다하여 아주 맛이 뛰어난 어종으로 알려져 하천어종으로서 중요한 위치를 차지하고 있다. 그러나, 최근 강의 오염이나 강바닥의 변화 등으로 차츰 분포가 축소되고 자원이 줄어들어 연구기관 및 도립 종묘 배양장을 중심으로 인공적으로 대량 종묘생산을 실시하고 있다. (중략)

• Parasites, Hosts and Diseases
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• v.26 no.4
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• pp.263-274
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• 1988

Recent patterns of infection with digenetic larval trematodes in fresh- water and brackish-water ask were studied in three locations of the river Taewha during the period from April to October, 1988, and compared with the data reported previously in the same river, 0(16 species of fish examined, the encysted larvae of Cyathocotyle orientalis were found most frequently from 9 species of fresh.water fish. The metacercariae of Echinochasmus sp. , Metacercaria hasegawai and Metagonimus yokogawai were found from 8 species, those of Clonorchis sinensis from 7 species, and Exorchis oviformis and Metorchis orientalis from 5 species of fish. The infection rates of fish with C. sinensis metacercariae were not lower than those reported in 1980, whereas their intensity of infection was found lowered in 3 species, Ccreobagrus brevicorpus, Gnathopogon atromaculatus, and Funtungia herzi. The infection rates of 3 species of fish with M. yokogawai metacercariae were lower than the results in 1982, while the rate was higher in 2 species, Zacco platypus, and Z. temmincki, and rather stationary in Flecoglossus altivelis. The intensity of infection in several species of fish appeared rather higher than in 1980. The encysted larvae of C. orientalis, Echinochasmus sp., E. oviformis and Metacercaria hasegawai showed variations in infection rates of fish in 1980 and in the present study. It was found that the rate of infection with digenetic larval trematodes in fresh- water fish was still relatively high in the river Taewha, and the metacercarial burden in the fish varied greatly by different fish in 1980 and in the present study.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.10a
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• pp.207-208
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• 2000

담수산 rotifer, Brachionus calyciflorus는 입의 크기가 작은 담수어 종묘생산시 자어의 초 먹이생물로 많이 이용되고 있다. 이들의 성장은 male의 출현 없이 폭발적으로 개체가 증가되는 처녀생식과 male의 출현으로 휴면란(내구란)을 생산할 수 있는 유성생식으로 나눌 수 있다. 특히, 유성생식에 의해 생성된 내구란은 종의 효율적인 보존 뿐만 아니라 Artemia cyst처럼 간단하게 부화시켜 자어에게 먹이로 공급할 수 있는 장점이 있다. (중략)

• Korean Journal of Ecology and Environment
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• v.47 no.spc
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• pp.83-99
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• 2014

Fish community of eight lagoons in the east seashore, Korea were investigated from 2007 to 2008. Total 66 species caught during the period were belonged to 34 families, and total biomass was 2,024.8 kg. Also, similarity analysis results of each lagoon were divided three major groups. On the other hand, result of a comparison of the composition ratio of freshwater fish, brackish water fish, and seawater fish which is divided into separate each age data of previous studies has emerged in this study, since the 1990's, freshwater fish is reduced, seawater fish and increase, some changes in the fish community had changed dynamically in the lagoon. These changes considered that against the natural hydrach succession will change to freshwater lake from brackish water lake. Therefore, we considered to ecological characteristics of lagoon and process of hydrach succession when conservation, management, and restoration of the lagoons.

• Journal of fish pathology
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• v.6 no.1
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• pp.21-55
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• 1993

Histopathological changes in gills by potassium permanganate were investigated in four fish species. flounder(Pararychthys olivaceus) and rockfish(Sebastes schlegeli) in marine fish, and carp(Cyprinus carpio) and eel(Anguilla japonica) in freshwater fish. Marine fishies were more sensitive to $KMnO_4$ than freshwater fishies and have shown histological changes even in low concentration of 1ppm. Eels were less affected than carp in high concentration of $KMnO_4$. Especially in eels, hyperplasia and hypertropy of mucus cells were observed. Compared to in underground water. the effect of KMnO₄ were reduced very much in pond water. That this differences were due to the concentration of organic substances were certained by experiment with various feed concentrations. The potency of $KMnO_4$ were influenced by dissolved oxygen.

• Journal of the Korean Society of Food Science and Nutrition
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• v.30 no.4
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• pp.574-578
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• 2001

Myofibrillar proteins were prepared from red muscle and white muscle of fresh water fish and sea water fish, and their thermostabilities and effect of temperature on the myofibrillar ATPase activities were compared. Differences in temperature dependency of myofibrillar ATPase activities were found between two species. Thermodynamic data for inactivation of myofibrillar proteins, such as D value, Z value, $\Delta$ $H^{{\neq}}$, $\Delta$ $G^{{\neq}}$ and $\Delta$ $S^{\neq}$ revealed that thermostabilities of myofibrillar proteins from fresh water fish were higher than those from sea water fish, and that myofibrillar proteins from red muscle were more heat labile than those from white muscle.

• 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.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.31 no.2
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• pp.160-167
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• 1998

Proximate composition, cholesterol (CHOL) and $\alpha-tocopherol$ ($\alpha-Toc$) content of seventy-two species of fish muscle (sea water fish, 59 species; fresh water fish, 13 species), which caught off Tongyeong coast of the Southern Sea ( Nam-Hae) and caught Kyeongho river, Sancheong, Korea, were determined. Lipid content was ranked from $0.53\%$ to $20.4\%$ and was high in the following order; mid-surface dwelling and migratory fish ($6.09{\pm}4.25\%$) > fresh water fish ($4.40{\pm}5.90\%$) > coastal and reep dwelling fish ($3.41{\pm}2.68\%$) > demersal fish ($2.12{\pm}2.41\%$). There was a negative correlation between the lipid and moisture content in all fish groups (p< 0.001). Protein was approximately $17\~18\%$ in all fish group, and no correlation was between the protein and moisture content in all but the demersal fish, which there was a negative correlation between both contents. Ash content was almost constant in all fish, accounting for $1\~2\%$, Cholesterol (CHOL) content was shown a great difference according to the fish species from 6.7 mg/100 g muscle (grass fish) to 249 mg/100 g (eel) and there was a positive correlation between the lipid and CHOL content. $\alpha-Toc$ content was less than 3 mg/100 g muscle in all fish, except that of eel (4.1 mg/100 g) and was relatively rich in the fish species contained a large amount of lipid.