Competência de peixes como predadores de larvas de Aedes aegypti, em condições de laboratório

Abstract

OBJECTIVE:To evaluate the effi cacy of fi sh as predators of the Aedes aegypti larvae in laboratory conditions. METHODS:The male and female of fi ve different fi sh were included in the experiment. The tests to measure their consumption ability lasted fi ve weeks for each species. Each trial involved four test tanks and four control tanks. Two control tanks contained just one fi sh, and the other two just larvae. Each of the test tanks contained one fi sh and the larvae. During the fi rst week, 100 larvae were placed in the tank, with an additional 100 added every week, up to a maximum daily amount of 500 larvae. The length and weight of the fi sh were measured at the beginning and end of every week. RESULTS:A total of 369,000 larvae were used. The Trichogaster trichopteros was the only species in which both sexes ate 100% of the available larvae. The Betta splendens failed to eat only 15 larvae. The male Poecilia reticulate showed a strong capacity for larvae eating, compared with the female of the same species. In terms of weight and size, the Betta splendens proved capable of eating 523 larvae per gram of weight per day. CONCLUSIONS:The female and male Trichogaster trichopteros and Astyanax fasciatus, and the female Betta splendens and Poecilia sphenops proved to be the most effective predators of the Aedes aegypti larvae. And although the male Poecilia sphenops and female Poecilia reticulata were less effective, they were also capable of eradicating the total number of Aedes aegypti larvae that could appear over 24 hours in a breeding site under natural conditions. The male Poecilia reticulata, however, proved incapable of doing so.

A scoping review of Chikungunya virus infection: epidemiology, clinical characteristics, viral co-circulation complications, and control

“…Poecilia reticulata) (Peter, 1859) have been suggested in several countries and regions for mosquito control, mainly for Ae. aegypti (Hoy, 1985;Das and Prasad, 1991;Cavalcanti et al, 2007;Walton, 2007;Chandra et al, 2008;Seng et al, 2008;Dumont and Chiroleu, 2010;Kweka et al, 2011;Kamareddine, 2012;Shulse et al, 2013;Pereira and Oliveira, 2014;Chobu et al, 2015;. More natural mosquito predators, including copepods [e.g.…”

“Where we put little fish in the water there are no mosquitoes:” a cross-sectional study on biological control of the Aedes aegypti vector in 90 coastal-region communities of Guerrero, Mexico

“…Laboratory experiments have identified different fish species that feed on larvae [11, 12]. Authors in Gujarat, India, reported that the native Aphanius dispar (Ruppell) fish is capable of consuming three types of mosquito larvae, including Aedes aegypti [13].…”

Toxicological assessment of spinosad: Implications for integrated control ofAedes aegyptiusing larvicides and larvivorous fish

“…Several investigators combatted against Aedes larvae utilizing poecilid larvivorous fish guppy and platy (Poecilia reticulata and Xiphophorus maculatus, respectively) in natural monitored habitats (Pamplona et al, 2004) as well as employing these fish in confined containers (Cavalcanti et al, 2007;Pereira and Oliveira, 2014).…”

“…Despite the abundance of guppies and platys and information on their ability to effectively control mosquito larvae (Cavalcanti et al, 2007) and data on toxicological effects of insecticide exposure in aquatic environment that are available (Abe et al, 2014;Meng et al, 2013;Kaya et al, 2013;Shun et al, 2013), the simultaneous use of fish with larvicides in Brazil against mosquito survival has not been exploited. Thus, the aim of this study was to assess under a realistic exposure scenario to Aedes larvae whether concurrent use of larvivorous fish and a natural larvicide might provide more effective protection against the mosquito population.…”