Assessment of Clarias gariepinus as a biological control agent against mosquito larvae

Buze Chala, Berhanu Erko, Abebe Animut, Abraham Degarege, Beyene Petros

Research output: Contribution to journalArticlepeer-review

Abstract

Background: The emergence and spread of insecticide resistant mosquitoes renewed interest in investigating the use of larvivorous fish as a biological control agent. The potential of Clarias gariepinus fish in controlling Anopheles arabiensis and culicine larvae was assessed under laboratory and semi-field conditions. Results: Small size (15-20 cm) C. gariepinus fish consumed greater number of mosquito larvae than the large size fish (25-40 cm) in the multivariate regression model (β = 13.36, 95 % CI = 4.57, 22.15). The Anopheles larvae consumed was greater in number than the culicines larvae consumed by the fish (β = 12.10, 95 % CI = 3.31, 20.89). The number of larvae consumed was greater during the night hours than during the light hours (β = 30.06, 95 % CI = 21.27, 38.85). Amount of supplementary fish food did not cause significant differences in the number of mosquito larvae consumed by the fish among different groups. C. gariepinus was observed to feed on mosquito larvae under laboratory and semi-field conditions. Conclusion:C. gariepinus fed on the larvae of An. arabiensis and culicines readily. Hence, it can be used as an alternative mosquito control agent in Ethiopia where the breeding habitats are small and localized.

Original languageEnglish (US)
Article number27
JournalBMC Ecology
Volume16
Issue number1
DOIs
StatePublished - May 31 2016

Keywords

  • Anopheles arabiensis
  • Biological control
  • Clarias gariepinus
  • Culex
  • Ethiopia
  • Larvae

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Environmental Science(all)

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