Document Detail

Food availability alters the effects of larval temperature on Aedes aegypti growth.
MedLine Citation:
PMID:  21936315     Owner:  NLM     Status:  MEDLINE    
Variation in temperature and food availability in larval habitats can influence the abundance, body size, and vector competence of the mosquito Aedes aegypti. Although increased temperature has energetic costs for growing larvae, how food resources influence the developmental response of this mosquito species to thermal conditions is unknown. We explored how rearing temperature and food affect allometric scaling between wing size and epidermal cell size in Ae. aegypti. Mosquitoes were reared at 22 and 28 degrees C across a gradient of field-collected detritus designed to simulate commonly observed natural larval food resources. Overall, reduced temperature and increased food level increased wing size, but only temperature affected cell size. Females fed the least food had the longest time to maturation, and their increases in wing size induced by cold temperature were associated with larger, rather than more, cells. By contrast, males fed the most food had the shortest time to maturation, and their increases in wing size induced by cold temperature were associated with more, rather than larger, cells. Therefore, food levels can alter the underlying physiological mechanisms generating temperature-size patterns in mosquitoes, suggesting that the control of development is sensitive to the combination of nutrient and thermal conditions, rather than each independently. Conditions prolonging development time may favor increased cell division over growth. We suggest that understanding the effects of climate change on Ae. aegypti vectorial capacity requires an improved knowledge of how water temperature interacts with limited food resources and competition in aquatic container habitats.
H Padmanabha; B Bolker; C C Lord; C Rubio; L P Lounibos
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of medical entomology     Volume:  48     ISSN:  0022-2585     ISO Abbreviation:  J. Med. Entomol.     Publication Date:  2011 Sep 
Date Detail:
Created Date:  2011-09-22     Completed Date:  2011-10-11     Revised Date:  2014-11-13    
Medline Journal Info:
Nlm Unique ID:  0375400     Medline TA:  J Med Entomol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  974-84     Citation Subset:  IM    
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MeSH Terms
Aedes / growth & development*,  physiology
Larva / growth & development,  physiology
Grant Support
R01 AI 044793/AI/NIAID NIH HHS; R01 AI044793/AI/NIAID NIH HHS; R01 AI044793-01/AI/NIAID NIH HHS; R01 AI044793-02/AI/NIAID NIH HHS; R01 AI044793-03/AI/NIAID NIH HHS; R01 AI044793-04/AI/NIAID NIH HHS; R01 AI044793-05A2/AI/NIAID NIH HHS; R01 AI044793-06/AI/NIAID NIH HHS; R01 AI044793-07/AI/NIAID NIH HHS; R01 AI044793-08/AI/NIAID NIH HHS; R01 AI044793-09/AI/NIAID NIH HHS

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