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Growth Assessment of Some Ornamental Fish Species Fed with Low Cost Feeds

Authors:

W. A. D. Mahaulpatha ,

University of Sri Jayewardenepura, Nugegoda, LK
About W. A. D.
Department of Zoology
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A. De Alwis,

University of Sri Jayewardenepura, Nugegoda, LK
About A.
Department of Zoology
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J. Jinadasa

University of Sri Jayewardenepura, Nugegoda, LK
About J.
Department of Zoology
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Abstract

Three feeds were formulated using low cost raw materials with protein contents ranging from 44% - 62% and prepared in the laboratory and were tested against an imported feed (protein 32%) on young stages (initial weight, 0.03 - 0.71 g.) of four species of ornamental fish namely, Rosy Barb (Barbas conchoniusy, Angel (Pterophyllum scalurey; Gold fish (Carassius auratus auratus) and Goggle - eye iCarassius sp.) over a period of 2 months to assess the feasibility of using locally prepared feeds in rearing of very young stages in ornamental fish culture.

 

High Assimilation Efficiencies (56 – 82%), low Food Conversion Ratios (less thae 2), high Growth Rates (0.005) - 0.02 g. day–1) and high Survival Rates (93% - 100) shown by all species on the prepared diets proved the locally prepared feeds to be highly acceptable.

 

The results also reveal that there is an optimal level of dietary protein requirement in the range of 44 - 50% for three of the four species studied.

 

The study also showed that the cost of feeds can be reduced by

(a) using low cost protein sources such as shrimp heads, fish/meat offals, rice bran and soya flour;

 

(b) using more carbohydrates with less protein.

How to Cite: Mahaulpatha, W.A.D., De Alwis, A. and Jinadasa, J., 1992. Growth Assessment of Some Ornamental Fish Species Fed with Low Cost Feeds. Vidyodaya Journal of Science, 4(1), pp.219–232. DOI: http://doi.org/10.4038/vjs.v4i1.6082
Published on 29 Dec 1992.
Peer Reviewed

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