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Latin american journal of aquatic research

versión On-line ISSN 0718-560X

Resumen

SILVA, Fábio Marcello da; FERREIRA, Maria Leiliane Silva; CAVALCANTE-LUCENA, Jorge Eduardo  y  BICUDO, Álvaro José de Almeida. DL-carnitine as supplementary levocarnitine source in plant-based diets to Nile tilapia (Oreochromis niloticus) fingerlings. Lat. Am. J. Aquat. Res. [online]. 2018, vol.46, n.4, pp.825-830. ISSN 0718-560X.  http://dx.doi.org/10.3856/vol46-issue4-fulltext-20.

The objective was to evaluate the effect of DL-carnitine levels on the growth and whole body and muscle composition of Nile tilapia fingerlings. A basal plant-based diet was supplemented with 0, 500, 1000, 1500, 2000, 3000 and 4000 mg kg−1 of DL-carnitine hydrochloride in a completely randomized design (n = 3). Fish (initial weight 0.8 ± 0.01 g) was hand-feed daily into three meals until apparent satiety for 70 days. The growth parameters were not influenced (P > 0.05) by dietary DL-carnitine levels. Muscle lipid decreased (P < 0.05) in fish fed with diets supplemented with 3000 and 4000 mg kg−1 of DL-carnitine, but there was no effect (P > 0.05) on whole body lipid. These results with DL-carnitine is similar to other studies using pure L-carnitine. Thus, the use of DL-carnitine as a source of levocarnitine in Nile tilapia diets require future studies.

Palabras clave : Nile tilapia; feed additive; fish nutrition; lipid metabolism.

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