Studies on A Trematode Parasitized on Bivalves V. On metacercaria of Echinostomatidae detected from Mactra veneriformis, Cyclina sinensis and Solen strictus

조개류(類)에 기생(寄生)하는 흡충류(吸蟲類)에 관(關)한 연구(硏究) V. 동죽, 가무락조개 및 맛조개에서 검출(檢出)되는 극구흡충류(棘口吸蟲類)의 유충(幼蟲)에 대(對)하여

An experiment was carried out in order to reveal the infection species of trematode and the infection demage in the marine bivalves. Metacercaria of Echinostomatidae were found in Mactra veneriformis, Cyclina sinensis and Solen strictus in the vicinity sea of Naecho-do, the estuary of the Keum River in the western coast of Korea. The metacercaria detected from Solen strictus were fed by Larus crassiostris, at 16 days after infection, the adult worm could be seceded. The metacercaria of Himasthla kusasigi were detected from Mactra veneriformis and Cyclina sinensis, their infection rates were 70.4% and 85.7% respectively. The partial infection rates with respect to the body parts were 40.4% and 77.3% in the foot, 17.0% and 12.4% in the gill, 12.6% and 10.3% in the mantle in order. The metacercaria of Acanthoparyphium were found from Solen strictus. The total infection rate was 63% and the partial infection rate was 63% and the partial infection rate was shown foot, mantle and gill in order. The adult worm ceded from Larus crassiostris was indentified as Acanthoparyphium tyosenensis Yamaguti, 1938 from view point of its physical characteristics. Therefore, Mactra veneriformis, Cyclina sinensis would be added as new intermediate hosts, and Echoinostoma decteded from Mactra sulcataria which was studied by author(1969) was revealed as larvae of Acanthoparyphium tyosenensis.

해산이매패(海産二枚貝)의 흡충류감염종(吸蟲類感染種)과 패류(貝類)의 병해(病害)를 조사할 목적으로 서해안(西海岸) 금강하구(錦江河口) 내초도산(內草島産) 동죽, 가무락 조개 및 맛조개에서 극구흡충과(棘口吸蟲科)의 피낭유충(被囊幼蟲)을 검출(檢出)하였고, 맛조개에서 검출된 피양유충(被襄幼蟲)을 괭이갈매기에 감염(感染)시켜 16일(日)만에 성충(成蟲)을 얻었다. 1. 동죽 및 가무락조개에서는 Himasthla kusasigi의 피낭유충을 검출(檢出)하였으며, 기생율(寄生率)은 각각 70.4%, 85.7% 이었다. 2. 조직부위별(組織部位別) Himasthla kusasigi의 기생율(寄生率)은 족부(足部) 40.4%, 77.3%, 아가미 17.0%, 12.4%, 외투막 12.6%, 10.3% 순으로 기생(寄生)되었다. 3. 맛조개에서 Acanthoparyphium속(屬) 흡충(吸蟲)의 피낭유충(被囊幼蟲)을 검출(檢出)하였으며, 기생율(寄生率)은 63%, 조직부위별 기생율은 foot, mantle, gill 순(順)으로 기생(寄生) 되었다. 4. 맛조개에서 검출(檢出)된 피낭유충(幼蟲)을 괭이갈매기에 감염(感染)시켜 16일만에 성충(成蟲)을 분리하여 충체(蟲體)의 내부(內部)구조를 조사한바 Acanthoparyphium tyosenensis Yamaguti, 1938로 동정(同定) 되었다. 5. 동죽 및 가무락조개는 Himathla kusasigi의 새로운 중간숙주(中間宿主)로 추가되며, 본인(本人)(1968)등(等)이 개량조개에서 검출보고(檢出報告)한 Echinostoma속 흡충(吸蟲)은 Acanthoparyphium tyosenensis흡충(吸蟲)의 유충(幼蟲)임이 밝혀졌다.