Distribution of Spiders on Paddy Fields in the Suburbs of Kwangju City

광주지방 논거미의 분포(I)

The distribution of spiders on paddy Holds in the suburbs of Kwangju city and the seasonal fluetuation of their population were surveyed for two years from November 1975 to November 1977. The results obtained are summarized as fallows: 1. The total number of species of the spiders on paddy fields collected in Kwangju area was 38 which belong to 24 genera and 13 families. Out of these 16 species were already known to exist in this area, and two other species were those known to occur in Korea. The remaining 22 species were new collections among which Cornicularia vulgaris 01 was the one with no record of collection in Korea. 2. The spiders on paddy fields collected in this area were mostly those belonging to two families i.e. Erigonidae and Lycosidae, and predominating species were Gnathenarium dantatum(WJDER) and Oedothorax insecticeps BOES. et STR. 3. The population density was highest in November just before wintering and lowest in March and April after wintering and an intermediate peak in July and August.

1975년 11월$\~$1977년 11월 사이에 광주지방의 논거미의 분포상과 계절적 밀도변동을 조사하여 다음과 같은 결과를 얻었다. 1. 광주산로 논거미로서 13과 24속 58종(7미확정종포함)을 확인하였으며 기중 한국산 논거미로 2종, 광주산 논거미로 22종을 추가하였다. 2. Cornicularia vulgaris OL(쌍코뿔 애접시거미)는 한국미기록종이었다. 3. 광주산 논거미의 우세과는 Erigonidae와 Lycosidae이며 특히 Erigonidae는 타지방에 비해 단연 우세하였다. 4. 우점종은 Gnathonarium dentatum(WIDER)가 $28.7\%$, Oedothorax insecticeps BOES. et STR.가 $28.3\%$로 월등한 우점현상을 나타냈다. 5. 기지 수원, 대구에서는 우세과 Lycosidae, 우점종 Pirate subpiraticus(BOES. et STR.)인데 비해 본지방에서 는 우세과 Erigonidae 우점종 Gnathonarium dentatum(WIDER)로 남북관계 내지 동서현상이 보였다. 6. 계절적 밀도 변동은 월동전인 11월이 최고이고, 월동후인 3,4월이 최저이며 7,8월이 중간 Peak인W자형 분포상을 나타낸다.