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Memórias do Instituto Oswaldo Cruz

Print version ISSN 0074-0276On-line version ISSN 1678-8060

Mem. Inst. Oswaldo Cruz vol.87 no.3 Rio de Janeiro July./Sept. 1992

http://dx.doi.org/10.1590/S0074-02761992000300010 

Dispersal of phlebotomine sand flies (Diptera: Psychodidae) in a colombian focus of leishmania (Viannia) brasiliensis

Bruce Alexander1 

David G. Young2 

Fundación CIDEIM, Sección de Entomología, department of Entomology & Nematology, Cali, Colombia

University of Florida, 3103 McCarty Hall, Florida, USA

ABSTRACT

Dispersal of five species of phlebotomine sand flies was studied in a coffee plantation near Arboledas, Colombia by mark-release-recapture studies using fluorescent powders. The estimated recapture rate for males of Lutzomyia shannoni marked and released during the day was 28.1% significantly higher than that for all other species (p < 0.05). Recapture rate of female Lu. shannoni was 9.5% and no females of the other four species were recovered. This suggests either that Lu. shannoni is a more sedentary species than the others, or that the large trees on wich these insects were captured and recaptured function as foci of lekking behaviour in males. The high recapture rates of females of this species may indicate that oviposition occurs in close proximity to the bases of these trees. Although most marked sand flies were recaptured within 200 m of their release point, a single female Lu. gomezi was recovered 960 m away 36 h after release. This suggests that the dispersal capacity of Lutzomyia species may be greater than has been though, an important consideration in future control programs directed against these insects in Leishmania-endemic areas.

Key words: Leishmania (Viannia) braziliensis; phlebotomine; coffee plantation; dispersal; mark-release; recapture; Colombia

 

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