Abstract

CISNEROS, Rosario. Growth performance of the native rotifer Brachionus sp. "Cayman" using different enrichment suplements. Ecol. apl. [online]. 2011, vol.10, n.2, pp.99-105. ISSN 1726-2216.

The rotifer Brachionus spp. is the most important live food for fish and crustacean cultures throughout the world. In order to improve the growth performance of native Brachionus sp."Cayman," Chilca strain, Perú, we performed an experimental study of long-term enrichment with four commercial supplements, Marol-E, Protein Hufa, Selcon, Easy Super Selco and the microalgae Nannochloropsis oculata as control. The experiment was carried out in 180 liter tanks with three replicates per treatment. We determined the egg ratio (F), population growth rate (TC) and productivity (R). ANOVA showed significant differences among treatments, Protein Hufa supplementation showed better results in terms of egg ratio (0.65±0.03 eggs.ind^-1), final density (149±0.58 indiv.mL^-1), population growth rate (0.38±0.02 día^-1) and productivity (29250±0.66 rot.L^-1 . day^-1) .

Keywords : culture; rotifers; enrichment; egg ratio; growth performance.

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