Does the Anopheles blood meal-fecundity curve, curve?
We determined the blood meal size-fecundity relationship in Anopheles gambiae in the laboratory. Our primary interest was to determine whether the fecundity curve has a non-linear component, i.e.. does it decelerate towards an asymptote? Small and large adult females in their second gonotrophic cycle were fed on human hosts for predetermined lengths of time. Blood meal size was ascertained by weight and subsequent fecundity was determined by the number of eggs laid on filter paper. In both small and large-bodied females there was a significant curvilinear component. We used this relationship to show that marginal returns from feeding decline as a function of current blood load. This means that further fecundity payoff for continued feeding declines over time.
Roitberg
Bernard D
BD
Department of Biology, Simon Fraser University, Burnaby, BC.
Gordon
Ian
I
D000818:Animals; D000852:Anopheles / Q000033:anatomy & histology* / Q000502:physiology*; D001769:Blood; D001824:Body Constitution; D005247:Feeding Behavior / Q000502:physiology; D005260:Female; D005298:Fertility / Q000502:physiology; D016015:Logistic Models; D008954:Models, Biological; D010058:Oviposition / Q000502:physiology*