RESUMEN
Two anthropophilic species are known from the Marquesas archipelago (French Polynesia): Simulium buissoni Roubaud, 1906 and S. sechani Craig & Fossati, 1995. The need to control them requires good knowledge about their larval growth, larvae being the only stage actually susceptible to control. A biometric study based on cephalic measures of the two species, shows that they both have seven larval instars. Size variations following species and sampling sites are examined, as are variations of the sex of the two last larval instars. A recolonization experiment, after treatment of a part of a river, allows us to quantify larval growing length of S. buissoni, which is about 12 days. These data allow us to determine the optimal treatment frequency.
Asunto(s)
Simuliidae/crecimiento & desarrollo , Animales , Larva/ultraestructura , Polinesia , Simuliidae/anatomía & histología , Especificidad de la Especie , Factores de TiempoRESUMEN
A statistical analysis was conducted, in order to compare the variations in values of a) blood samples obtained with several finger-pricks from the same individual in a short period of time, and b) blood samples obtained from the same finger-puncture. No significant difference was observed: both groups seem to follow a negative binomial distribution, the exponent of which is not dependent on the microfilarial count average. This common exponent is roughly equal to the volume of the blood sample, expressed in cmm.