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Asia-Pacific Journal of Public Health, Vol. 20, No. 1, 56-63 (2008)
DOI: 10.1177/1010539507308507

Larvivorous Potential of the Guppy, Poecilia reticulata, in Anopheline Mosquito Control in Riverbed Pools Below the Kotmale Dam, Sri Lanka

P.H.D. Kusumawathie, MPhil, PhD

Regional Office, Anti Malaria Campaign, Kandy, Sri Lanka

A.R. Wickremasinghe, MPH, PhD

Department of Public Health, Faculty of Medicine, University of Kelaniya, Ragama, Sri Lanka, arwicks{at}sltnet.lk

N.D. Karunaweera, MBBS, PhD

Department of Parasitology, Faculty of Medicine, University of Colombo, Colombo 8, Sri Lanka

M.J.S. Wijeyaratne, PhD

Department of Zoology, University of Kelaniya, Kelaniya, Sri Lanka

The larvivorous potential of Poecilia reticulata was studied in the laboratory and in the field. In the laboratory, the number of anopheline larvae consumed per fish per day and the number of larvae in fecal matter per fish were determined. In the field study, 29 of 60 selected riverbed pools in Kotmale oya, below the Kotmale dam, were stocked with P reticulata, whereas the rest served as controls. Anopheline larval surveys were carried out starting from 1 day prior to stocking of fish and on selected days subsequently. P. reticulata consumed an average of 117 � 32.33 larvae per fish per day. Fecal matter of P. reticulata contained an average of 2.7 � 2.68 larvae per fish . There was a significant reduction in the number of pools positive for anopheline larvae (P < .001) after stocking fish and the number of larvae per pool (P < .001) and per 100 dips (P < .001) as compared with controls.

Key Words: anopheline larvae • larvivorous potential • Poecilia reticulata • riverbed pools


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