Title: Spatial distribution of larvae of the mosquito Culex tritaeniorhynchus summorosus in a rice field area
Abstract:Spatial distribution of Culex tritaeniorhynchus summorosuslarvae was studied in a rice field area surrounded by low hills, common in Nagasaki Prefecture. Rice fields in the area were about 15 hectares...Spatial distribution of Culex tritaeniorhynchus summorosuslarvae was studied in a rice field area surrounded by low hills, common in Nagasaki Prefecture. Rice fields in the area were about 15 hectares (roughly 500 rice fields), and among them 100 rice fields made of 11 groups were selected as study plots from various parts of the area. The study was done from May to October and the results were as follows. Larvae of Culex tritaeniorhynchus summorosustended to concentrate in rice fields situated in some part of the whole area at a certain time and the position of such part changed during the period of mosquitooccurence. Moreover the density level differed, sometimes markedly, among rice fields situated closely in a same group. These results are interesting in relation to the population study of this mosquito. Firstly, they ascertain our previous report that the number of rice fields examined should be increased, even though the number of dips taken from a rice field is decrease to only one, for estimating the relative density of the whole area in maximum efficiency. Secondly, they show that one rice field should be considered as one of natural unit for larval population in a rice field area. The latter seems to be very significant for understanding the processes of population fluctuation of this species, for density effects by overcrowding of larvae may act in some rice fields, while density in many other rice fields is remained low.Read More
Publication Year: 1973
Publication Date: 1973-06-30
Language: en
Type: article
Access and Citation
Cited By Count: 6
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot