Abstract
The present study was undertaken to survey the infection status of Metagonimus sp. metacercariae in freshwater fishes from Tong river located in Kangwon Province, a total of 178 freshwater fishes of 11 species were collected by a fish net and traps from the end of September to early October 1998. They were brought to the laboratory and examined under a stereomicroscope after artificial digestion with pepsin-HCI solution for one hour. Ten out of eleven species of freshwater fishes examined were found to contain metacercariae of Metagonimus sp. The most frequently infected fish was Liobagrus andersoni Regan 91.7% (11 of 12 fishes), followed by Gobiobotia breviburba Mori 75.0% (6 of 8 fishes), Zacco temmincki 66.2% (49 of 74 fishes), Cobitis koreensis Kim 50.0% (1 of 2 fishes), Microphysogobio longidorsails Mori 42.9% (9 of 21 fishes), Cobitis rotundicudata Wakiya et Mori 33.3% (2 of 6 fishes), Hemibarbus longirostris 33.3% (1 of 3 fishes), Pungtungia tenuicorpus 30.0% (3 of 10 fishes), Coreoleuciscus splenddus Mori 28.6% (4 of 14 fishes), Coreoperca herri Herzeanstein 11.1％ (1 of 9 fishes) respectively Metagonimus metacercariae was not found from Moroco kumgangensis Uchida of freshwater fish. The total number of Metagonimus sp. metacercariae was 81, 17, 216, 1, 14, 2, 1, 4, 10, 1, respectively. Infection rates of Metagonimus sp. in the five districts was shown as follows : Chongson-up Kyulam-ri 50.0% (12 of 24 fishes), Chongson-up Kasu-ri 34.0% (17 of 50 fishes), Shindong-up Unchi-ri 56.0% (14 of 25 fishes), Shingdong-up Kosong-ri 57.1％ (20 of 35 fishes), Shingdong-up Duckchon-ri 54.5% (24 of 44 fishes) respectively. Infection rate of freshwater fish was 48.9% (87 of 178 fishes) and from the results obtained in this survey, it was confirmed that freshwater fishes from Tong river was infected with metacercariae of Metagonimus sp.
1998년 9월 30일부터 10월 7일에 걸쳐서 강원도 동강 유역인 정선군 정선읍 귤암리, 정선읍 가수리, 신동읍 운치리, 신동읍 고성리, 신동읍 덕천리 등 5개 지역에서 투망으로 포획한 담수어 11종, 178마리를 대상으로 인공 소화액법을 이용하여 Metagonimus 속의 피낭유충에 의한 감염률을 조사하였다. 감염률은 퉁가리 (Liobagrus andersoni) 91.7% (l1/12), 돌상어 (Gobiobotia brevibarba) 75.0% (6/8), 갈겨니 (Zacco temmincki) 66.2% (49/74), 참종개 (Cobitis koreensis) 50.0% (1/2), 배사가리 (Microphysogobio longidorsalis) 42.9% (9/21), 새코미꾸리 (Cobitis rotundicud-ata)는 33.3% (2/6), 참마자(Hemibarbus tongirostris)는 33.3% (1/3), 가는 돌고기 (Pungtungia tenuicorpus) 30.0% (3/10), 쉬리 (Coreoleuciscus splenddus)는 28.6% (4/14) 그리고 꺽지 (Coreoperco herri) 11.1% (1/9)의 순으로 나타났다. 어종별 피낭유충의 검출 결과 갈겨니는 74마리에서 216개체가 검출되었고 퉁가리는 12마리 에서 81개체, 돌상어는 8마리에서 17개체, 배사가리는 21마리에서 14개체, 쉬리는 14마리에서 10개체, 가는 돌고기는 10마리에서 4개체, 새코미꾸리는 6마리에서 2개체, 꺽지는 9마리에서 1개체, 참종개는 2 마리에서 1개체, 참마자는 3마리에서 1개체가 검출되었다. 각 지역별로 채집한 담수어의 Metagonimus sp. 감염 양성률은 정선읍 귤암리 50.0%(12/24),정선읍 가수리 34.0%(17/50), 신동읍 운치리 56.0% (14/25), 신동읍 고성리 57.1%(20/35), 신동읍 덕천리 54.5%(24/44)를 나타내었다. 동강유역인 정선군의 5개 지역에서는 담수어 11종중 10종이 Metagonimus속 피낭유충에 감염되어 있음을 알 수 있었다.