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Impact of rice field development in disease vectors in Indonesia

印度尼西亚稻田开发对病媒的影响

基本信息

批准号：
08041179
负责人：
MOGI Motoyoshi
金额：
$ 7.74万
依托单位：
Saga Medical School
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

项目摘要

Impact of rice field development of disease vectors in Indonesia was investigated with the following hypotheses. Hyposesis 1 : there is an increased probability of vector outbreaks in early phases of rice field development projects when ecosystems are inmmature. Hyposesis 2 : rice field development improves standards of life, thus reduce the probability of being bitten by vectors. Research consists of (1) continual study at rice field development project areas in North Sulawesi and Seram, and (2) comparative study of villages at various stages of rice field development. Main results are as foolows. To understand impact of rice field development more clearly, study of disease vectors in aboriginal villages were included.(1)Many ground pools are produced on open lands produced by deforestation for rice field development, but mosquito outbreaks are prevented by colonization of predacious insects. (2)Newly constructed rice fields are occupied by insect predatoers which prevent mosquito out … More breaks. In some rice fields without predators, anopheline outbreaks were observed. (3)Aboriginal villages have no containers for mosquito-breeding around houses. New transmigration villages have a few containers and older transmigration villages have more containers. Important mosquito habitats in new transmigration villages were stagnant ditches for waste water and pools keeping human excreta. (4)Fauna of latrine flies are richest in the natural forest and aboriginal villages. In new transmigration villages with primitive lavatories, old transmigration villages, and urban areas, only a few introduced species of latrine flies occur at high densities. (5)The house fly is not found in natural forests and its densities increase with years after human settlement. (6)Sepsid flies in transmigration villages consist of species introduced with introduction of domestic animals. (7)Type and abundance of mosquito-breeding habitats in villages with irrigated rice fields are essentially the same as those of villages with rain-fed rice fields, because of the meintenance of traditional living style.The hyposeses were partly justified, but there were also unexpected findings. Continual stude for the all stages of rice field development is necessary. Less

根据以下假设调查了印度尼西亚稻田病媒发展的影响。假设1：在稻田开发项目的早期阶段，当生态系统不成熟时，病媒爆发的可能性更大。假设2：稻田的发展提高了生活水平，从而降低了被病媒叮咬的概率。研究包括(1)在北苏拉威西和西兰的稻田开发项目区进行持续研究，(2)对稻田开发不同阶段的村庄进行比较研究。主要结果如下：为了更清楚地了解稻田开发的影响，包括对土著村庄病媒的研究。(1)许多地面水池是在因开发稻田而砍伐森林的空地上产生的，但食肉昆虫的定植防止了蚊子的爆发。(2)新建的稻田被昆虫捕食者占据，蚊子无法出去。在一些没有捕食者的稻田中，观察到按蚊爆发。(3)原住民村庄房屋周围没有供蚊子繁殖的容器。新的迁移村有一些集装箱，旧的迁移村有更多的集装箱。新迁移村主要的蚊虫生境是污水沟和人类排泄物池。(4)天然森林和原始村落的厕所蝇区系最丰富。在具有原始厕所的新迁移村、旧迁移村和城市地区，只有少数引进种的厕所蝇密度较高。(5)天然林中没有家蝇，人类定居后家蝇密度随时间的增加而增加。(6)迁徙村蝇类由家畜引进的蝇类组成。(7)由于保持了传统的生活方式，灌溉水稻田村与雨养水稻田村的蚊虫孳生生境类型和丰度基本相同。这些假设在一定程度上是正确的，但也有意想不到的发现。对稻田发展的各个阶段进行持续的研究是必要的。少