[1] INT CTR INSECT PHYSIOL & ECOL,POB 30772,NAIROBI,KENYA
来源:
INSECT SCIENCE AND ITS APPLICATION
|
1993年
/
14卷
/
01期
关键词:
MOSQUITOS;
ANOPHELES-GAMBIAE;
SURVIVORSHIP;
LIFE TABLES;
D O I:
10.1017/S1742758400013370
中图分类号:
Q96 [昆虫学];
学科分类号:
摘要:
The stage-specific and age-specific survivorship of the immature gambiae Giles s.l. were studied in Baringo District Kenya, using vertical life-table methods. Survivorship from first instar to adult emergence was 0.085, giving a mortality of 91.5% during the rainy season. However, survivorship dropped to zero (100% mortality) in the dry season. Mortality was most severe in the first and second instars in all cases. Mean life expectancy increased significantly for larvae that survived beyond the first 3 days of life. Suspected predators of mosquito pre-imagines in the breeding sites were collected and counted. From their large numbers and diversity it was inferred that predation was probably an important mortality factor.