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Free Content Reduced oviposition of Aedes aegypti gravid females in domestic containers with predatory fish

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The presence of pathogens or predators in water may alter oviposition behaviour of gravid female Aedes aegypti mosquitoes. We evaluated the oviposition behaviour of A. aegypti in recipients containing larvivorous fish (Betta splendens and Poecilia reticulata). In four breeders, fish specimens were placed in 15 l of dechlorined water. Four control breeders only contained dechlorined water. Breeders with eucatex ovitraps and approximately 100 male and female mosquitoes were placed in wire netting cages. During a period of 7 weeks, eggs on the ovitraps were counted weekly. The median number of eggs laid in recipients with B. splendens (32.5/week) was lower than in those with P. reticulata (200.5/week) and the control group (186.5/week; P <0.0001). The oviposition activity index (OAI) for P. reticulata did not show any considerable difference between posture in deposits with and without fish (‐0005). Deposits with B. splendens showed a lower position than those used as controls (‐0627). We conclude that B. splendens can be used to effectively prevent gravid A. aegypti females from laying eggs in large water containers.
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Keywords: Aedes aegypti; Betta splendens; Poecilia reticulata; biological control; control biológico; larvivorous fish; lutte biologique; oviposición; oviposition; peces larvívoros; poissons larvivores; ponte

Language: English

Document Type: Research Article

Affiliations: 1:  Department of Community Health, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil 2:  Department of Public Health, University of Ceará State and National Health Foundation (FUNASA), Fortaleza, Brazil

Publication date: 2009-11-01

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