The Community Structure and Dynamic of Parasitic Mites on House Rats

서울과 경기지역의 주가성 쥐에 기생하는 진드기군집의 구조와 동태에 관하여

The parasitic mites were collected from a total of 2,691 house rats in four areas of Seoul, Seongnam, Incheon and Yangsuri of Korea from January, 1983 to December, 1986, Infestation rates, the species composition of the mites. species diversity, evenness, dominance, similarity of the mites among the areas and monthly abundance were studied as follows: Among twenty-one species of mites identified from two species of house rats in the areas, 12 species belonged to Mesostigmata, 8 species to prostigmata and 1 species to Metastigmata. Out of twenty-one species, ten including Androlaelaps casalis were commonly found only on Rattus norvegicus, however, two including Haemogamsus serdjukovae only on Rattus rattus, and all the trombiculid mites were found in particular on R norvegicus. The highest infestation rates of the mites on the rats ranged from June to August in all the areas throughout the year. The species diversity of the mites was the highest (0.6280) in Yangsuri with the highest evenness value (0.5770) observed in Incheon. The seasonal species diversities in Seoul, Seongnam and Yangsuri were higher in April, October and March respectively than the other time of the year. The highest similarity value was calculated between Yangsuri and Seoul areas, compared with the lowest combination in Seoul and Seongnam areas. The seasonal indices of mites showed that the most abundant number of mites was observed in spring and summer in Seoul and Seongnam, in summer and autumn in Incheon and in the winter season in Yangsuri. The mesostigmatid and metastigmatid mites were collected abundantly in July and September from R. norvegicus and R rattus in Seoul with the highest number of the above mites found from R. norvegicus in June in Seongnam. Particularly in Yangsuri, a large number of the mites were collected all the year round.

주가성 쥐의 진드기 류에 대한 기생률은 4척조사지역 모두 2, 3월에는 낮고 6월부터 8월까지는 최고 기생률을 보였으며 채집된 진드기류는 3아목 5과 12속 21종이었고 숙주별로는 집쥐에서 19종, 곰쥐에서 11종이 채집되었다. 숙주선택성은 집쥐에서 10종으로 나타났으며 T-mites는 서울과 양수리지역이 다른 조사지역보다 많이 곳현했으며 L. palpale가 우점종으로 나타났다. 종다양도와 균등도와 지역별 비교는 양수리지역의 종구성이 다양하고 균등도는 인천지역이 가장 높았으며 계절별로 우점도를 보면 서울지역은 5월에, 성남지역은 3월에, 인천지역과 양수리지역은 년중 높게 나타났다. 지역별 유사도지수는 양수리와 서울지역이 0.8333으로 가장 높았다. 서울과 성남지역은 봄과 여름에, 인천지역은 여름과 가을에, 양수리지역은 겨울철에 다른 조사지역보다 진드리류가 많이 나타났으며 인천지역은 다른 3척 조사지역과는 달리 집쥐에서보다 곰쥐에서 더 많은 충체를 보유하고 있었다.