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The effects of temephos, permethrin and malathion selection on the fitness and fecundity of Aedes aegypti

Gleave, Katherine ORCID:, Mechan, Frank and Reimer, Lisa ORCID: (2021) 'The effects of temephos, permethrin and malathion selection on the fitness and fecundity of Aedes aegypti'. Medical and veterinary entomology, Vol 36, Issue 1, pp. 56-65.

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The recent scale‐up of insecticide use has led to the rapid spread of insecticide resistance (IR) in mosquito populations across the world. Previous work has suggested that IR mechanisms could influence mosquito life‐history traits, leading to alterations in fitness and key physiological functions. This study investigates to what extent mosquito fitness may be affected in a colony of Aedes aegypti after selection with temephos, permethrin or malathion insecticides. We measured immature development, sex ratio, adult longevity, energetic reserves under different rearing conditions and time points, ingested bloodmeal volume, mosquito size, male and female reproductive fitness and flight capability in the unexposed offspring of the three selected strains and unselected strain. We found that insecticide selection does have an impact on mosquito fitness traits in both male and female mosquitoes, with our temephos‐exposed strain showing the highest immature development rates, improved adult survival, larger females under crowded rearing and increased sperm number in males. In contrast, this strain showed the poorest reproductive success, demonstrating that insecticide selection leads to trade‐offs in life‐history traits, which have the potential to either enhance or limit disease transmission potential.

Item Type: Article
Subjects: QX Parasitology > Insects. Other Parasites > QX 510 Mosquitoes
QX Parasitology > Insects. Other Parasites > QX 525 Aedes
QX Parasitology > Insects. Other Parasites > QX 600 Insect control. Tick control
Faculty: Department: Biological Sciences > Vector Biology Department
Digital Object Identifer (DOI):
SWORD Depositor: JISC Pubrouter
Depositing User: Stacy Murtagh
Date Deposited: 10 Nov 2021 13:35
Last Modified: 06 Apr 2022 14:09


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