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<p>The Asian tiger mosquito, <i>Aedes albopictus</i>, is a vector of several arboviral diseases, including dengue. The increasing reports of insecticide resistance and the adverse effects of synthetic insecticides on non-target species have raised demand for a safer alternative for controlling mosquitoes. Although larvivorous fish are introduced as a safe alternative, the negative effects of invasive species such as Gambusia have already raised concerns. This study revealed an excellent target-specific control potential of the indigenous ornamental fish <i>Trichogaster fasciata</i> for the aquatic stages of <i>Ae. albopictus</i> with an average consumption of 913.25 ± 8.86 larvae and 407.75 ± 12.11 pupae at 24&#xa0;h, competent enough to commercial invasive larvivorous fish. During the collection of larvae for experiments, a preliminary survey was conducted using ovitraps in the premises of Gauhati University, Assam, India. Notably, 100% positive ovitrap indices were recorded in May, along with the presence of its predator mosquito <i>Toxorhynchites splendens</i>. The larvivorous potential of <i>T. splendens</i> was also examined for comparison with <i>T. fasciata</i>, and it was observed that a single <i>T. splendens</i> larva consumes 14.00 ± 1.08 larvae of <i>Ae. albopictus</i> at 24&#xa0;h. Moreover, to examine any species-specific preference of <i>T. fasciata</i>, its feeding efficiency was tested against another mosquito species, <i>Culex quinquefasciatus</i>, and was found to be significantly lower than that against <i>Ae. albopictus</i>. Based on this study, we recommend using the indigenous fish <i>T. fasciata</i> to control <i>Aedes</i> mosquitoes in medium to large-sized breeding habitats, especially in amusement parks, nurseries, artificial containers, gardens and other natural habitats.</p>

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Larvivorous Potential of Indigenous Fish Trichogaster Fasciata for Control of Dengue Vectors in Assam, North-East India

  • 期刊论文

  • 发表日期：

    2026年5月20日

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  • Dipamani Sarma,
  • Bulbuli Khanikor,
  • Avansika Haflongbar,
  • Dadere Mwshahary

摘要

The Asian tiger mosquito, Aedes albopictus, is a vector of several arboviral diseases, including dengue. The increasing reports of insecticide resistance and the adverse effects of synthetic insecticides on non-target species have raised demand for a safer alternative for controlling mosquitoes. Although larvivorous fish are introduced as a safe alternative, the negative effects of invasive species such as Gambusia have already raised concerns. This study revealed an excellent target-specific control potential of the indigenous ornamental fish Trichogaster fasciata for the aquatic stages of Ae. albopictus with an average consumption of 913.25 ± 8.86 larvae and 407.75 ± 12.11 pupae at 24 h, competent enough to commercial invasive larvivorous fish. During the collection of larvae for experiments, a preliminary survey was conducted using ovitraps in the premises of Gauhati University, Assam, India. Notably, 100% positive ovitrap indices were recorded in May, along with the presence of its predator mosquito Toxorhynchites splendens. The larvivorous potential of T. splendens was also examined for comparison with T. fasciata, and it was observed that a single T. splendens larva consumes 14.00 ± 1.08 larvae of Ae. albopictus at 24 h. Moreover, to examine any species-specific preference of T. fasciata, its feeding efficiency was tested against another mosquito species, Culex quinquefasciatus, and was found to be significantly lower than that against Ae. albopictus. Based on this study, we recommend using the indigenous fish T. fasciata to control Aedes mosquitoes in medium to large-sized breeding habitats, especially in amusement parks, nurseries, artificial containers, gardens and other natural habitats.