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

Pamplona, Luciano de Góes Cavalcanti, Alencar, Carlos H., Lima, José Wellington O. , and Heukelbach, Jorg (2009) Reduced oviposition of Aedes aegypti gravid females in domestic containers with predatory fish. Tropical Medicine & International Health, 14 (11). pp. 1347-1350.

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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.

Item ID: 11512
Item Type: Article (Research - C1)
ISSN: 1365-3156
Keywords: Aedes aegypti; larvivorous fish; oviposition; biological control; Betta splendens; Poecilia reticulata
Date Deposited: 04 Jun 2010 05:23
FoR Codes: 11 MEDICAL AND HEALTH SCIENCES > 1199 Other Medical and Health Sciences > 119999 Medical and Health Sciences not elsewhere classified @ 100%
SEO Codes: 92 HEALTH > 9299 Other Health > 929999 Health not elsewhere classified @ 100%
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