Estimating dispersal and survival of Anopheles gambiae and Anopheles funestus along the Kenyan coast by using mark-release-recapture methods.
Mark-release-recapture (MRR) experiments were conducted with emerging Anopheles gambiae s.l. and Anophelesfunestus Giles at Jaribuni and Mtepeni in Kilifi, along the Kenyan Coast. Of 739 and 1246 Anopheles released at Jaribuni and Mtepeni, 24.6 and 4.33% were recaptured, respectively. The daily survival probability was 0.96 for An. funestus and 0.95 for An. gambiae in Jaribuni and 0.83 and 0.95, respectively, in Mtepeni. The maximum flight distance recorded was 661 m. The high survival probability of An. gambiae and An. funestus estimated accounts for the continuous transmission of malaria along the Kenyan coast. This study also shows that the release of young, emergent female Anopheles improves the recapture rates and may be a better approach to MRR studies.
Department of Entomology, Kenya Medical Research Institute, Centre for Geographic Medicine Research-Coast, P.O. Box 428, Kilifi, Kenya. jmidega@kilifi.kemri-wellcome.org
Janet T
JT
Midega
Charles M
CM
Mbogo
Henry
H
Mwnambi
Michael D
MD
Wilson
Gordon
G
Ojwang
Joseph M
JM
Mwangangi
Joseph G
JG
Nzovu
John I
JI
Githure
Guiyun
G
Yan
John C
JC
Beier
D000818:Animals; D000852:Anopheles / Q000502:physiology*; D005260:Female; D007630:Kenya; D007814:Larva; D008136:Longevity; D011157:Population Dynamics; D013997:Time Factors