Temperature during larval development and adult maintenance influences the survival of Anopheles gambiae s.s.

Particle and Fibre Toxicology

María-Gloria Basáñez⁴  Jacob C Koella²  Adam Saddler¹  Paul E Parham³  Céline Christiansen-Jucht⁴ 

[1]Division of Biology, Faculty of Life Sciences, Imperial College London, Silwood Park Campus, Ascot SL5 2PZ, Berkshire, UK

[2]Present address : Faculté des Sciences, Institut de Biologie, Université de Neuchâtel, Rue Emile-Argand 11, Neuchâtel, CH-2000, Switzerland

[3]Grantham Institute for Climate Change, Department of Infectious Disease Epidemiology, School of Public Health, Faculty of Medicine, St. Mary¿s campus, Imperial College London, London W2 1PG, UK

[4]Department of Infectious Disease Epidemiology, School of Public Health, Faculty of Medicine (St Mary¿s campus), Imperial College London, Norfolk Place, London W2 1PG, UK

关键词: Climate change;    Mosquito survival;    Larval survival;    Environmental temperature;    Anopheles gambiae sensu stricto;   

Others  :  1149489
DOI  :  10.1186/s13071-014-0489-3

 received in 2014-05-19, accepted in 2014-10-13,  发布年份 2014

【 摘 要 】

Background

Malaria transmission depends on vector life-history parameters and population dynamics, and particularly on the survival of adult Anopheles mosquitoes. These dynamics are sensitive to climatic and environmental factors, and temperature is a particularly important driver. Data currently exist on the influence of constant and fluctuating adult environmental temperature on adult Anopheles gambiae s.s. survival and on the effect of larval environmental temperature on larval survival, but none on how larval temperature affects adult life-history parameters.

Methods

Mosquito larvae and pupae were reared individually at different temperatures (23?±?1°C, 27?±?1°C, 31?±?1°C, and 35?±?1°C), 75?±?5% relative humidity. Upon emergence into imagoes, individual adult females were either left at their larval temperature or placed at a different temperature within the range above. Survival was monitored every 24 hours and data were analysed using non-parametric and parametric methods. The Gompertz distribution fitted the survivorship data better than the gamma, Weibull, and exponential distributions overall and was adopted to describe mosquito mortality rates.

Results

Increasing environmental temperature during the larval stages decreased larval survival (p??0.05), but an 8°C increase did (p?

Conclusions

Environmental temperature affects Anopheles survival directly during the juvenile and adult stages, and indirectly, since temperature during larval development significantly influences adult survival. These results will help to parameterise more reliable mathematical models investigating the potential impact of temperature and global warming on malaria transmission.

【 授权许可】

   
2014 Christiansen-Jucht et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

Figure 2.

Figure 3.

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