• Parasites, Hosts and Diseases
• /
• v.22 no.2
• /
• pp.190-202
• /
• 1984

In an attempt to clarify the epidemiological feature of distomiasis in Tongjin riverside area, the prevalence of distomiasis in the residents and infection rates of the metacercariae in fresh-water fishes were investigated at the upper, middle and lower reaches of the river from January to April, 1984. The results obtained were summarized as follows: 1. Out of a total of 931 fresh-water fishes which composed of 33 different species, 611 fishes(65.6%) of 31 species were found positive with digenetic trematode metacercariae of 16 different species, and there were some differences in infection rates of the metacercariae among the fishes in the 3 parts of the river; 53.8% in upper, 80.7% in middle, and 61.0% in lower reaches, respectively. 2. Infection rates of the metacercariae of Exorchis oviformis, Metagonimus yokogawai, Echinochasmus japenicus, Metorchis orientalis and Clonorchis sinensis in the fishes were 48%,29%, 115, 7.9% and 6.3oA, respectively. 3. The average number of the encysted larvae of Clonorchis found in fish body/gram showed 4.44 in Pseudorasbera larva, Gnathepegon coreanus (1.2), Microphysogoio yaluensis (0.76), Abbottina springeri (0.4), Acanthorhodeus asmussi (0.21) and Cultriculus eigenmanni (0.17), respectively. 4. The average number of the metacercariae of Metagonimus found in fish body/gram disclosed 34.01 in Zacco platypus, Zacco temmincki (16.46), Carassius carassius (5.35), Moroco oxycephalus (1.54) , Aphyocypris chinensis (1.5) and etc., respectively. 5. Detection rates of the eggs of Clonorchis and Metagonimus among residents were 1.1% and 0.8%, respectively, out of a total 923 Persons.

• YAKHAK HOEJI
• /
• v.22 no.1
• /
• pp.42-50
• /
• 1978

The plasma proteins of fresh water fishes have been fractionated by disc electrophoresis in acrylamide gels utilized as an electrophoretic supporting medium. The species of fishes examined in this experiment were Anguilla japonica, Misgurnus mizolepis, Parasilurus asotus, Siniperca scherzeri, Pelteobagrus fulvidra, Carassius carassius, Cyprinus carpio, and Hemibarbus labeo, obtained in the Han River. Disc electrophoresis was performed as described by Ornstein and Davis. Gels and buffer solution were prepared by the method developed by W.J.Kim. The separation gels were 7% acrylamide gel. The fractionation of plasma proteins showed 13 bands in Anguilla japonica, 10 in Misgurnus mizolepis, 15 in Parasilurus asotus, 12 in Siniperca scherzeri, 11 in Pelteobagrus fulvidra, 13 in Carassius carassius, 9 in Cyprinus carpio, and 13 in Hemibarbus labeo. The patterns of plasma protein on the each species of fishes were different in the number of bands, ratio of contents, relative mobilities, and forms of fractionation.

• Parasites, Hosts and Diseases
• /
• v.21 no.2
• /
• pp.187-192
• /
• 1983

In order to clarify infestation Pattern for the encysted larvae of digenetic trematodes from fresh-water fishes, this survey was carried out from March to September, 1983. A total of 380 fishes of 32 species wore collected with netting at the three reaches, upper, middle and lower in Mangyeong riverside area. After the fishes were dissected into small scraps, they were pressed under cover glass and examined-for the presence of those of digenetic trematodes with a microscope. The resillts obtailled were as follows; Out of a total of 380 knishes inspected, 320 fishes(84%) from 31 species were found positive with, digenetic trematode metacercariae; more than 10 species of the metacercariae Ivere detected in Pseuderasbora parva; .Gnnthepegen mtajimae, Microphysogokio yaluensis, Cultriculus eigenmanni and Gnnthopogon coreanus (more than 8 species) ; Aphyocypris chinensis (8 species) and etc. respectively. Clonorchis sinensis metacercariae were found positive from 93 fishes (25%) from 12 species and detection rates in other species of digenetic trematode metacercariae from various fishes were; Exorchis oviformis, 261 fisles (57%) from 28 species; Cyathocotyle criensalis, 47 fishcs (12%) from 12 species; Metorchis orientalis, 21 fishes (6%) from 12 species; Metagonimus yokogawai, 164 fishes (43%) from 26 species; Pseudesorchis major, 71 fishes (19%) from 18 species; Metacercaria haiegawai, 77 fishes (20%) from 25 species; Centrocestus armatus, 24 fishes (6%) from 7 species; Echinochasmus japonicus, 2 fishes (0.5%) from 2 species, and unidentified species, 34 fishes (9%) from 15 species respectively. The sums of average number of the encysted larvae of all species found in fish body/gram showed 83 in P.parva, Cobitis taenia (74.2), A. chinensis (28.5), Pseudoperilampus uyekii (26.6), G. majimae (19.6) and etc. respectively and the average peak number of each metacercaria in fish body/gram showed 21.7 C. sinensis, 245. ovifcrmis, 15, 3 M, crientalis and 6.1 5. japonicus in P. parva. 42.7 C. orientalis and 25.1 M. yohogawai in C. taenia; 8.3 C. armatus and 8.3 M. hasegawai in P. uyekii. 6.3 P. major in Carassius carassius, and 2.9 unidentified species in G, niajimae respectively.

• Parasites, Hosts and Diseases
• /
• v.25 no.2
• /
• pp.123-128
• /
• 1987

The author investigated the larvicidal action of liquid nitrogen against the metacercariae of Clonorchis sinensis, with an observation on the freshness and change of taste in the flesh of fishes. The results obtained were as follows: 1. The metacercariae in the mesh of Pseudorasbora parve, which were treated with liquid nitrogen ($-192^{\circ}C$), were not killed within 10 seconds, but completely killed over 30 seconds. In comparison, the metacercariae in the flesh of p. parka kept in a refrigerator ($-12^{\circ}C$) were killed only in 84% in 10-hour exposure group. 2. The freezing speed of fishes by liquid nitrogen was 4 min.(') and 15 seconds(") for Cyprinus carpio, 1'22" for Carassius carassius and only $30^{\circ}C$ for Pseudorasbora larva. 3. As for the freshness and taste of raw fresh water fishes, they were not deteriorated after the treatment with liquid nitrogen. 4. In animal infection experiment of C. sinensis metacercariae after freezing, they were found not infective after they were treated with liquid nitrogen. From the results, it is inferred that the treatment of fresh water fishes for longer than 30 seconds with liquid nitrogen is helpful to reduce the possibility of C, sinensis infection without alteration of the freshness and taste of fishes.

• Journal of fish pathology
• /
• v.2 no.1
• /
• pp.31-36
• /
• 1989

• Proceedings of the Zoological Society Korea Conference
• /
• 1997.04a
• /
• pp.53.2-53
• /
• 1997

No Abstract, See Full Text

• Korean Journal of Ecology and Environment
• /
• v.34 no.3 s.95
• /
• pp.251-258
• /
• 2001

The ichthyofauna and passing efficiency of fish ways were surveyed in the lower and upper regions of the river mouth dam in the lower reaches of the Nakdong river from June to December in 20()0. As the dam built in the river mouth, the brackish area in the estuary disappeared completely and the transitional area did not formed. The fishes collected from survey were classified into 49 species, 45 genera belonging to 29 families. Among them, the fresh water fishes composed of 10 species, peripheral freshwater fishes 11 species and sea water fishes 28 species respectively. Because of the ecological difference between the fresh and sea water, dominant species in the Myeong-ji of sea water area was Acanthogobius flavimanus (39.1%) and in the Sa-sang of fresh water area was Achanthorhodeus macropterus (44.4%). By the video camera records, fishes were identified nine species like as Coilia ectenes, Cyprinus carpio, Hemibarbus labeo, Squalidus gracilis majimae, Plecoglosus altivelis, Lateolabrax japonicus, Anguilla japonica, Mugil cephalus and Pholis nebulosa. Based on total species collected, the efficiency of the fish way for the anadromous fish was 10.1%. Therefore, efficiency evaluation of the fish way in the Nakdong River Mouth Dam was low.

• The Korean Journal of Zoology
• /
• v.11 no.1
• /
• pp.13-21
• /
• 1968

1. The authors have collected 40 species of fresh-water fishes at 10 streams located at east side area of Taebaik Mountain Chain, from Songhyon-ri, Hyonnae-myon, Kosung-Kun, Kangwon-do to Chodang cave, Koenduck-myon, Samchok-kun, Kangwon-do from May 25, 1966 to August 30, 1967. 2. Of 40 species 14 are not distributed in the Han River, another 17 are not found in northern part of Wonsan and 11 are not distributed in southern part of Woolchin located at east coast of Korea. 3. Thirty-three species of northern fresh-water fishes, 16 of southern species and 60 of the Han River species were not distributed in the studied area. 4. We consider that the studied area should be included intermediate district of Amur and China subregion. We also believe that the difference of the fish fauna of the studied area and northern part, southern part and the Han River is originated by ecological and geohistorical factors. 5. We consider that Ganthopogon strigatus, Cobitis rotundicaudata, Coreoperca kawamebari, Leucopsarion petersi are distributed in the studied area are remarkable facts. On the other hand, it was quite strange that Gobiogobio, Pseudorasbora parva, Zacco paltypus, Zacco temmincki are not found in the area.

• Parasites, Hosts and Diseases
• /
• v.21 no.2
• /
• pp.157-166
• /
• 1983

In an attempt to clarify the epidemiological feature of C. sinensis in Mangyeong riverside area, the prevalence of clonorchiasis, infestation rate of the cercariae in Parafossarulus manchouricus, and detection rate of the metacercariae in fresh-water fishes were investigated from March 1 to September 30, 1983 at the upper, middle and lower reaches of the river. The results obtained were summarized as follows : 1. Detection rate of C. sinensis egg among inhabitants was 8.2% out of a total of 1,266 personsr, but the differences in detection rates were not statistically significant among upper, middle and lower reaches. According to sect, the detection rates were 10.3% in male and 6.1% in female (p<0.05), but by age groups, increases of the rates were observed as increase in age (p<0.05). 2. Out of a total of 380 fresh-water fishes of 32 different species, 93 fishes (25%) of 12 species were found positive with Clonorchis metacercariae, and there were differences in infection rates of the metacercariae among the fishes in 3 parts of the river; 11% in upper, 35% in middle, and 34% in lower reaches respectively. The metacercarial detection rates from various fishes were 97% in Pseudorasbora larva, Cultriculus eigenmanni (85%) , Gnathepogon strigatus (67%), Microphysogobio yaluensis (50%), Gnathopogon coreanus (47%), Pungtungia hergi (44%), Abbotting riwularis (40%), Moroco oxycephalus (33%), Coreoleuciscus splendidus (32%), Gnathepogon majimap (26%), Rhodeus ocellatus (7%), and Aphyocypris chinensis (3%) respectively. 3. Although very few p. manchouricus were collected at upper reach, 12 snails (0.7%) among a total of 1,713 were found infected with Clonorchis cercariae. Also the cercariae of Echinochasmup iapenicus (7.99%), Lexogenes liberum (0.99%), Cyathocotyle orientalis (0.75%), Esorchis oviformis (0.23%) and Asymphylodora japonica (0.05%) were detected from the snails.

• Journal of Ecology and Environment
• /
• v.43 no.2
• /
• pp.282-283
• /
• 2019