Effects of available sugar on the reproductive fitness and vectorial capacity of the malaria vector Anopheles gambiae (Diptera: Culicidae)
Effects of available sugar on the reproductive fitness and vectorial capacity of the malaria vector Anopheles gambiae (Diptera: Culicidae)
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DOI：
10.1603/0022-2585-38.1.22
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发表时间：
2001-01-01
影响因子：
2.1
通讯作者：
Foster, WA
中科院分区：
文献类型：
--
作者：
Gary, RE;Foster, WA
虽然已知大多数蚊子的雌性使用糖作为必要的能量来源，但雌性冈比亚按蚊Giles sensu stricto被认为是随意使用或根本不使用糖。然而，无糖生活的实地证据是不确定的，生殖健康和矢量能力的影响是未知的。为了评估糖在这些蚊子的生态学中可能发挥的作用，将雌性安。实验室中的冈比亚人可以不进食（仅喝水）、10%蔗糖、人血或人血+10%蔗糖，并比较每日死亡率、繁殖力和叮咬频率。糖的可用性向量的能力和内在增长率，健身措施的影响，然后进行了测定。给予血糖+糖的女性（合并和个体）比其他饮食的女性寿命长得多。每天的繁殖力是更高的女性给予血液单独比那些喂养的血液+糖（13对9个鸡蛋，每名女性每天）。然而，总繁殖力和内在增长率不受糖供应。对于仅给予血液的雌性动物，叮咬频率显著更高（每只雌性动物每天0.41对0.26次叮咬）。尽管存活率降低，但在27 ℃时，完全吸血导致理论上更高的恶性疟原虫媒介能力。这些数据表明，女性安。冈比亚可以用增加血液喂养来取代糖，而不会抑制生殖健康。反过来，吸血的增加可能会增加疟疾的传播速度，并可能解释这种媒介的异常效率。
Although females of most mosquito species are known to use sugar as a necessary source of energy, female Anopheles gambiae Giles sensu stricto are thought to use it facultatively or not at all. However, field evidence of sugar-free living is inconclusive, and the implications for reproductive fitness and vectorial capacity are unknown. To evaluate the role that sugar may play in the ecology of these mosquitoes, mated female An. gambiae in the laboratory were given access to either no food (water only), 10% sucrose, human blood, or human blood + 10% sucrose, and comparisons of daily mortality, fecundity, and biting frequency were made. The effect of sugar availability on vectorial capacity and the intrinsic rate of increase, a measure of fitness, then were determined. Females (pooled and individual) given blood + sugar lived significantly longer than did those on the other diets. Daily fecundity was higher for females given blood alone than for those fed blood + sugar (13 versus 9 eggs per female daily). However, total fecundity and intrinsic rate of increase were not affected by sugar availability. Biting frequency was significantly higher (0.41 versus 0.26 bites per female per day) for females given blood alone. Despite the reduced survivorship, exclusive blood-feeding led to a theoretically higher vectorial capacity for Plasmodium falciparum at 27 degreesC. These data indicate that female An. gambiae could replace sugar with increased blood feeding without suppressing reproductive fitness. Increased blood feeding could, in turn, increase the rate of malaria transmission and may explain the unusual efficiency of this vector.