European Journal of Biotechnology and Bioscience

European Journal of Biotechnology and Bioscience


European Journal of Biotechnology and Bioscience
European Journal of Biotechnology and Bioscience
Vol. 3, Issue 12 (2015)

Effect of space on the feeding efficiency of dragonfly nymph Bradynopyga geminata


R Avila Varshini, M Kanagappan

Among various predators of mosquito larvae, dragonfly nymphs are efficient, found naturally, safe for human beings, and are alsorneconomical in their application. There are many physical, chemical and biological factors like prey species, prey size, prey stage,rnpredator species, predator size, predator stage, aquatic vegetation, quality and quantity of water, illumination, and space affect thernfeeding efficiency of dragonfly nymphs. These factors serve as a basis for the richness or otherwise biological productivity of anyrnaquatic environment. The present study shows negative correlation where with the increasing space of the basins the feedingrnefficiency of the nymph decreased. The maximum prey consumption 34.91 ±3.96 was recorded when the circumference of the basinrnwas 4 cm and the water level was 3 cm height and minimum predation 16 ±2.72 was recorded when the circumference of the basinrnwas 64 cm and the water level was 3 cm height.
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How to cite this article:
R Avila Varshini, M Kanagappan. Effect of space on the feeding efficiency of dragonfly nymph Bradynopyga geminata. European Journal of Biotechnology and Bioscience, Volume 3, Issue 12, 2015, Pages 06-10
European Journal of Biotechnology and Bioscience