Klowden M J, Lea A O
Am J Trop Med Hyg. 1978 Jul;27(4):827-31. doi: 10.4269/ajtmh.1978.27.827.
The effect of ingested blood on the host-seeking response of two strains of Aedes aegypti was examined. Using an olfactometer, females fed partial blood meals were scored for host-seeking behavior within 1 h, and their blood meal sizes were measured chemically immediately afterwards. The suppression of host-seeking within 1 h after a blood meal appears to be caused by abdominal distention from ingested blood. Mosquitoes of either strain were attracted to a host when the blood meal size was less than 2.5 microliter; above this threshold there was a sharp decline in the tendency to respond. Small mosquitoes resulting from a low larval diet had a lower threshold, and were more likely to cease host-seeking after a small blood meal. Multiple feeding within a single gonotrophic cycle may result if mosquitoes take small blood meals which are insufficient to terminate host-seeking. Partial meals and reduced feeding success of mosquitoes can result from defensive host behavior, which in the laboratory rat was shown to increase at high mosquito densities.
研究了摄入的血液对两株埃及伊蚊寻找宿主反应的影响。使用嗅觉仪，对进食部分血餐的雌性蚊子在1小时内的寻找宿主行为进行评分，并在进食后立即化学测量其血餐量。血餐后1小时内寻找宿主行为的抑制似乎是由摄入血液导致的腹部膨胀引起的。当血餐量小于2.5微升时，任何一个品系的蚊子都会被宿主吸引；高于这个阈值，做出反应的倾向会急剧下降。幼虫低营养饮食产生的小蚊子阈值较低，在进食少量血餐后更有可能停止寻找宿主。如果蚊子摄入的少量血餐不足以终止寻找宿主行为，在单个生殖营养周期内可能会出现多次进食。蚊子的部分进食和进食成功率降低可能是由于宿主的防御行为导致的，在实验室大鼠中已表明，在高蚊子密度下这种行为会增加。
