Addition of microalgae Nannochloropsis sp. and Isochrysis sp. in the feed of Nile tilapia larvae
DOI:
https://doi.org/10.53660/CONJ-855-P58Palavras-chave:
larviculture, lyophilized microalgae, Oreochromis niloticus, welfareResumo
Microalgae added to feed can increase the quality, production, and welfare of fish, although they contain antinutritive factors and allelopathic compounds that can be harmful. The aim of this work was to compare the effect of five feeds: Basic feed and enriched with two levels of Nannochloropsis sp. and Isochrysis sp. lyophilized (15 and 30 kg-1 of feed) in larval rearing of Nile tilapia. The larvae fed with Isochrysis sp. (15 and 30 g kg-1) had some yield parameters slightly lower than those of the larvae fed with the basal feed. For larvae fed with Nannochloropsis sp., all yield parameters were similar to those of the control group, except for the weight and stress resistance of larvae fed with the 15 g kg-1 enriched feed, which were lower than those of the control group. Since the main objective of juvenile fish producers is survival rate, which was high and stable in larvae fed with Nannochloropsis sp. (30 g kg-1), it is recommended that this feed should be used for rearing Nile tilapia larvae. The inclusion of Isochrysis sp. in the feed should be better evaluated.
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