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Chemical evaluation of Lake Victoria lakefly as nutrient source in animal feeds

Published online by Cambridge University Press:  19 September 2011

John Okedi
John Okedi
Affiliation:
Department of Zoology, Makerere University, P. O. Box 7062, Kampala, Uganda
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Abstract

Biochemical analysis of lakefly (chironomid/chaoborid mixtures and Povilla adusta samples) were conducted to determine their nutrient value and their potential as source of high quality nutrients in animal feeds. The results showed lakefly as rich in protein (62–67 g/100 g), fat (10 g/100 g) and ash (4–6 g/100 g). Moisture was low as was crude fibre. Povilla were richer in crude protein (67.4 g/100 g) and calcium (152 mg/100 g). The chironomid chaoborid mixture was however extremely rich in phosphorus (1.2 × 103 mg/100 g) and potassium (1.2 × 103 mg/100 g). Other trace elements were present in significant quantities as were niacine, thiamine and riboflavin. It is therefore deemed feasible to produce high quality nutrient concentrates from lakefly material for use in animal feeds. Further work Is however essential to determine lakefly digestibility and palatability and to ascertain suitable lakewide harvest techniques for the lakefly.

Résumé

Les analyses biochimiques des mouches iacustres (les mixtures chironomide/chaoboride et les échantillons Povilla adusta) ont été faites pour déterminer leur valeur nutritive et leur potentiel de servir comme source de nutrition de haute qualité dans les aliments pour animaux. Les résultats ont montré que les mouches Iacustres sont riches en protéine (62–67 g/100 g), en graisse 10 g/100 g) et en cendres (4–6 g/100 g). La quantité d'humidité était base, constituant la fibre crue. Povilla étaient plus riches en protéine crude (67,4 g/100 g) et en calcium (152 mg/100 g). La mixture chironomide/chaoboride cependant était extrêmement riche en phosphore (1,2 × 103 mg/100 g), en potassium 1,2 × 103 mg/100 g). D'autres éléments presents en quantités importantes étaient: la niacine, la thiamine et le riboflavin. C'est done considéré faisable de produire des concentrés de nutrition de très haute qualité à partir des mouches Iacustres à utiliser dans les aliments pour animaux. Il faut néanmoins des études plus approfondies pour déterminer la digestabilité et la palatabilité des mouches lacustres et pour identifier les technique de sa collection sur le lac entier.

Keywords

Biochemical analysislakeflyPovilla adustanutrient valueanimal feeds
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 13 , Issue 3 , June 1992 , pp. 373 - 376
Copyright
Copyright © ICIPE 1992

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