title: [Methods for population sampling of the immature stages of Simulium damnosum Theobald, 1903 (Diptera, Simuliidae) in West Africa. I. Preliminary observations on the vertical distribution of larvae and pupae (author's transl)].
abstract: Three techniques for sampling larvae of Simulium damnosum in different water depths are described. Preliminary results prove that the larvae can settle much deeper, i.e. up to 3 m, than reported before (0-30 cm). Without impairment pupation takes place in any depth.
mesh_terms: D000818:Animals; D005618:Fresh Water; D007814:Larva; D009758:Nymph; D009855:Onchocerciasis / Q000635:transmission*; D011156:Population Density; D011576:Psychodidae / Q000254:growth & development
vernacular_title: Méthodes d'échantillonnage des populations préimaginales de Simulium damnosum Theobald, 1903 (Diptera, Simuliidae) en Afrique de l'Ouest. I. Distribution verticale des larves et des nymphes: observations préliminaires