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韓國産 모기의 生態學的 硏究 : 第二編 韓國産 Anpheles屬 모기의 生態學的 硏究
元炳徽,洪漢基 東國大學校 1968 論文集 Vol.5 No.-
Biological investigations were carried out in the western plain area of Okku-gun, Cholla-pukdo province in 1964, in the hilly area of Asan-gun, Chungchong-namdo province in 1965, and in mountinous area of Andong-gun in 1966, Chongsong-gun in 1967 and Yongju-gun, Kyonsang-Pukdo province in 1963 and 1968. 1. Anopheline mosquitoes found during the investigation period are as follows: 1) Anopheles sinensis Wiedemann. 1825 2) Anopheles yatsushiroensis Miyasaki. 1951 3) Anopheles sineroides Yamada. 1925 4) Anopheles koreicus Yamada & Watanabe. 1918 5) Anopheles lindesayi japonicus Yamada. 1918 1),2),3) among the five species of Anophline mosquitoes were distributed in all of the studied areas, however 4) and 5) were found in the mountinous area. 2. Population density and seasonal appearance of Anopheline mosquitoes. A. sinensis is the widely distributed and predominant species in the all investigated areas, and shows the higher density in the plain area than the mountinous area. This species is to be appeared from begining of march and to be disappeared in October, and shows the peak population density in July during the mosquito season. A. yatsushiroensis is a widely distributed common species, and to be appeared from May to October with two peaks in June and September. The population density of this species in mountinous area is higher than the plain area. A. sineroides is widely distributed species but rare. Seasonal appearance of this species was from May to October and higher population was shown in mountinous area. A. koreicus and A. lindesayi japonicus is the species to be appeared in mountinous area and colledted from May to October, however A. lindesayi japonicus is very rare and limited breeding species in the mountinous area. 3. Feeding habits of Anopheline mosquitoes In the early spring A. sinensis was collected in open air by daytime cowbiting collection under the low temperature and earlier day of catching was the third of March and latest day was the 14th of May. The total average number of A. sinensis collected by per day was 5.7 mosquitoes in Sangchapo village and 7.5 in Hachapo in 1966. The number of A. sinensis collected in the afternoon was higher than the morning and fair day was higher than cloudy. The feeding activity at night was continued throughout the night. The peak period of feeding activity through the noght had shown in different time in each month such as between 21.00-22.00 hours in June, 24.00-01.00 hours in July, 03.00-04.00 hours in August and 21.00-22.00 hours in September. The minimum temperature for feeding activity was 14℃ and optimum was between 24-25℃ in the field. Night time feeding activity of A. yatsushiroensis was throughout the night and shown two peak periods at two hours before and after from the sun-rise and the sun-set. The other species of sineriodes and loreicus were not shown the special peak period of feeding at night. A. sinensis shown the zoophilism, however in Okku area the human biting rate was the 16 times higher than Asan area, and a number of biting mosquito in out door were 1.3 times higher than indoor. The light attraction of A. sinensis is 2.5 times higher by one candle food. The human biting rate of A. yatsushiroensis was 13.4% higher than A. sinensis by experimental feeding test. 4. Resting habits of Anopheles mosquites Anopheline mosquitoes were collected in most of the places in house, but the main resting places were cow shed (82.1%) and pigsty(12.4%). Out of 7.125 Anopheline mosquitoes collected from the houses since from 1964 to 1967, and A. sinensis was 88.2% A. yatsushiroensis 1.4%, A. sineroides 3.5% and koreicus 6.9%. From the resting place collections in outdoor, A. sinensis and A. yatsushiroensis are 61.6% and 52.4% from parsley field, 9.1% and 24.0% from seed bed of rice field, and other 11% and 9% fromother resting places such as bean field, vegetable, potatoes and so on. In the Experimental trap but collection, the collected number of A. sinensis in exit window trap were 76.4% in July and 81.3% in August, and 95.7% in July and 97.1% in August for A. yatsushiroensis. 5. Out of 1349 female of A. sinensis released from DDT sprayed room(DDT 2g/㎡), 29% of A.sinensis were collected from exit window trap and 42% of A. sinensis were dead mosquitoes in the sprayed room. 24 hours survival test of A. sinensis which was collected from exit window trap showed the 74% mortality and 8% of total released mosquitoes was only alived. 6. Parous rate of A. sinensis in Asan area were 50.5% in June, 64.4% in July, 82.7% in August, 93.5% in September and the parous rate of A. yatsushiroensis were 71.9% in June, 74.3% in July, 87.9% in August. 7. Main breeding place of Anopheline mosquitoes were rice field, stream, pond and parsley field. 8. Malaria in fection of Anopheline mosquitoes Two A. sinensis were found to be positive for sporozoite from salivary gland dissection out of 4018 females in 1967 and one A. yatsushiroensis was found to be positive for oocyst from stomach dissection out of 89 females in 1966. In 1968 four species of Anopheline mosquites were tested for experimental infection of malaria (p. vivax), and one A. sinensis was infected for oocyst among eight females tested and three A. yatsushiroensis were infected for one oocyst and two sporozoite among nine tested females. Other species were not infected. 9. Filaria (B. malayi) infection of mosqitoes One female of A. yatsushiroensis was found to be infective of filarial larvae out of 89 dissected mosquitoes in 1966 and six females of A. sinensis were found to be positive out of 1380 dissected females in 1967. Experimental infection of microfilariae(B. malayi) to the Anopheline mosquitoes were carred out in 1968. Twelve females of A. sinensis were infected among thirty five tested females, ten females of A. yatsushirionsis were infected (62.5%) out of the sexteen, and nine of A. sineroides were infected (90%) among ten females.