Larval and adult environmental temperatures influence the adult reproductive traits of Anopheles gambiae s.s.
Larval and adult environmental temperatures influence the adult reproductive traits of Anopheles gambiae s.s.
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DOI：
10.1186/s13071-015-1053-5
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发表时间：
2015-09-17
影响因子：
3.2
通讯作者：
Basanez, Maria-Gloria
中科院分区：
文献类型：
--
作者：
Christiansen-Jucht, Celine D.;Parham, Paul E.;Basanez, Maria-Gloria
背景资料：按蚊生活史参数和种群动态强烈影响疟疾传播，环境因素，特别是温度，强烈影响这些参数。目前有一些关于温度如何影响冈比亚按蚊的研究。生存，但很少有研究其他生活史特征。我们在这里研究了温度对种群动力学参数的影响。方法：冈比亚按蚊s.s.未成熟个体分别在23 +/-1 ℃、27 +/-1 ℃、31 +/-1 ℃和35 +/-1 ℃饲养，而成虫保持在其幼虫温度或其它温度之一。每24小时检查幼虫发育到下一阶段，并测量大小;测量翅长作为成年大小的代表。对雌性动物进行三次血液喂养，并对喂养和产卵的雌性动物数量进行计数。结果：幼虫期温度升高导致幼虫显著变小（p = 0.005），成虫显著变小（p < 0.001）。成虫温度对产卵时间无影响，幼虫温度仅影响第一批卵的孵化期。温度影响卵的孵化时间，也影响各发育阶段的发育时间。当成虫保持在27摄氏度时，产卵数量最高，在31摄氏度时最低，较高的成虫温度降低了第二次和第三次血餐后孵化的卵的比例。较高的成人温度显着降低吸血的概率，但幼虫温度的成人采取血餐的概率没有影响。第一，第二，和第三次血粉之间的差异进行了观察产卵和孵化，产卵的数量，和喂养和产卵的概率。结论：我们的研究表明，环境温度在幼虫阶段，以及在成人阶段影响按蚊的生活史参数。需要关于温度和其他气候因素如何影响病媒生活史参数的数据，以便更可靠地确定预测全球变暖如何影响疟疾传播的模型参数。
Background: Anopheles mosquito life-history parameters and population dynamics strongly influence malaria transmission, and environmental factors, particularly temperature, strongly affect these parameters. There are currently some studies on how temperature affects Anopheles gambiae s.s. survival but very few exist examining other life-history traits. We investigate here the effect of temperature on population dynamics parameters.Methods: Anopheles gambiae s.s. immatures were reared individually at 23 +/- 1 degrees C, 27 +/- 1 degrees C, 31 +/- 1 degrees C, and 35 +/- 1 degrees C, and adults were held at their larval temperature or at one of the other temperatures. Larvae were checked every 24 h for development to the next stage and measured for size; wing length was measured as a proxy for adult size. Females were blood fed three times, and the number of females feeding and laying eggs was counted. The numbers of eggs and percentage of eggs hatched were recorded.Results: Increasing temperatures during the larval stages resulted in significantly smaller larvae (p = 0.005) and smaller adults (p < 0.001). Adult temperature had no effect on the time to egg laying, and the larval temperature of adults only affected the incubation period of the first egg batch. Temperature influenced the time to hatching of eggs, as well as the time to development at every stage. The number of eggs laid was highest when adults were kept at 27 degrees C, and lowest at 31 degrees C, and higher adult temperatures decreased the proportion of eggs hatching after the second and third blood meal. Higher adult temperatures significantly decreased the probability of blood feeding, but the larval temperature of adults had no influence on the probability of taking a blood meal. Differences were observed between the first, second, and third blood meal in the times to egg laying and hatching, number of eggs laid, and probabilities of feeding and laying eggs.Conclusions: Our study shows that environmental temperature during the larval stages as well as during the adult stages affects Anopheles life-history parameters. Data on how temperature and other climatic factors affect vector life-history parameters are necessary to parameterise more reliably models predicting how global warming may influence malaria transmission.