Abstract
The acceptable nutritional value of Lemna as an ingredient in diets for Cyprinus carpio (L.) fry was experimented under aquarium culture system for 120 days. For that purpose fry of approximately equal weight were distributed in groups of 15 to each four aquaria at 0%, 15%, 30% and 45% inclusion levels of Lemna. The fry were fed at 5% body weight twice daily morning and evening. The three inclusion levels of duckweed supported the growth of Cyprinus carpio fry but growth performance, weight gain growth rate was favoured by low inclusion of duckweed meal. Highest bodyweight gain % was recorded on the group of fish bed diet (0% inclusion of duckweed) which was not significantly different (P<0.05) from (15% level inclusion of duckweed). The study clearly showed that fry fed diet 15% duckweed dietary inclusion perform best result and fishmeal was non replaceable but can be supplemented with duckweed up to an optimum level to produce cost effective feed.
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