Lyimo E O, Takken W
Ifakara Centre, Tanzania.
Med Vet Entomol. 1993 Oct;7(4):328-32. doi: 10.1111/j.1365-2915.1993.tb00700.x.
The influence of adult body size on the pre-gravid state and fecundity was studied in Anopheles gambiae Giles females hand-caught inside houses and virgin females collected as pupae in Tanzania. Blood-fed mosquitoes were kept for 2-3 days before dissection and examination for insemination and ovarian condition. Those females which did not develop eggs were classified as pre-gravid. The number of mature eggs in those mosquitoes which became gravid was counted. Virgin females were fed and kept for egg maturation in the laboratory. Wing-length of females was measured as an index of mosquito size. The overall pre-gravid rate in the resting An.gambiae population was found to be 21% and, of these, 66% had been inseminated. In the virgin females the pre-gravid rate was 92.6%. The mean wing-length of wild females which became gravid was significantly larger than those which remained pre-gravid. There was a positive correlation between fecundity and wing-length. Smaller females tended to require two or three bloodmeals to facilitate completion of the first gonotrophic cycle. The critical size permitting oviposition from the first blood-meal was a wing-length of 3 mm.
在坦桑尼亚，对室内人工捕捉的冈比亚按蚊雌蚊以及作为蛹收集的未交配雌蚊进行研究，以探讨成年蚊子体型对妊娠前状态和繁殖力的影响。血饲蚊子在解剖和检查受精及卵巢状况前饲养2至3天。未发育出卵的雌蚊被归类为妊娠前状态。对已妊娠的蚊子体内成熟卵的数量进行计数。未交配雌蚊在实验室中喂食并饲养以促进卵子成熟。测量雌蚊的翅长作为蚊子体型的指标。结果发现，静止的冈比亚按蚊种群中妊娠前状态的总体比例为21%，其中66%已受精。在未交配雌蚊中，妊娠前状态的比例为92.6%。已妊娠的野生雌蚊的平均翅长显著大于仍处于妊娠前状态的雌蚊。繁殖力与翅长之间存在正相关。体型较小的雌蚊往往需要两次或三次血餐才能完成第一个生殖营养周期。允许从第一次血餐开始产卵的临界体型是翅长3毫米。
