Survival of Betta splendens fish (Regan, 1910) in domestic water containers and its effectiveness in controlling Aedes aegypti larvae (Linnaeus, 1762) in Northeast Brazil
Wellington de Oliveira Lima, José, Pamplona de Góes Cavalcanti, Luciano, José Soares Pontes, Ricardo, and Heukelbach, Jörg (2010) Survival of Betta splendens fish (Regan, 1910) in domestic water containers and its effectiveness in controlling Aedes aegypti larvae (Linnaeus, 1762) in Northeast Brazil. Tropical Medicine and International Health , 15 (12). pp. 1525-1532.
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Objective: In Northeast Brazil, large domestic containers used to store water are important breeding sites of Aedes aegypti, the main vector of dengue fever. The objective of this study was to estimate the survival of Betta splendens (Perciformes: Osphronemidae) fish in domestic containers in Fortaleza (Ceará State), as well as its effectiveness in the control of premature A. aegypti stages.
Methods: The use of B. splendens was compared to Bacillus thuringiensis israelensis (Bti) in domestic containers. In a first home visit, B. splendens or Bti were applied to water containers. Two follow-up visits were conducted after 3–4 and 5–6 months to assess the presence of viable fish in the containers and infestation by larvae. Betta splendens fish were still present in 97.6% of containers 45–60 days after application. When the fish was present, the infestation rate was significantly higher (P < 0.001) in the Bti group (IR ratio = 21.60; 95% CI: 6.46–72.28). In deposits where the fish remained, efficacy was 85% better than Bti. The permanence of fish was higher in concrete tanks (48.5%) located outside the house (47.5%) and at ground level (53.3%). We conclude that B. splendens may be suitable for biological control of A. aegypti larvae in large domestic water containers, but that appropriate measures should be taken to assure prolonged survival and the presence of fish in the containers.
|Item Type:||Article (Refereed Research - C1)|
|Keywords:||dengue, Aedes aegypti, biological control, larvivorous fish, Betta splendens|
|FoR Codes:||11 MEDICAL AND HEALTH SCIENCES > 1117 Public Health and Health Services > 111799 Public Health and Health Services not elsewhere classified @ 100%|
|SEO Codes:||92 HEALTH > 9204 Public Health (excl. Specific Population Health) > 920499 Public Health (excl. Specific Population Health) not elsewhere classified @ 100%|
|Deposited On:||13 May 2011 17:17|
|Last Modified:||18 Oct 2013 01:16|
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