Crude fat, digestible protein and DL-carnitine levels in plant-based diets to Nile tilapia Oreochromis niloticus fingerlings

Samantha Chung, Ricardo Yuji Sado, Álvaro José de Almeida Bicudo

Submited: 2019-12-30 16:40:12 | Published: 2020-09-01 15:36:11

DOI: https://doi.org/10.3856/vol48-issue4-fulltext-2497

Abstract


The chemical composition of diets is appointed as one responsible by different results of L-carnitine supplementation in fish. This study determined the effects of digestible dietary protein (DP; 250 and 290 g kg-1) and crude fat (CF; 100 and 150 g kg-1) at levels of DL-carnitine supplementation (DLC; 0 and 1.0 g kg-1) in plant based-diets on growth and whole-body composition of Nile tilapia Oreochromis niloticus fingerlings (1.55 ± 0.03 g). Fish were hand-fed for 74 days, three times per day until apparent satiation, in a completely randomized experimental design, 2×2×2 factorial scheme (n = 3). There was no effect (P > 0.05) of DP, CF, and DLC, or interactions, on growth performance. There was a significant interaction between DP×CF; DP×DLC and DLC×CF on feed efficiency. There was interaction (P < 0.05) between CF×DLC on feed intake (DFI). The DLC supplementation in 100 g kg-1 CF diets increased DFI 5.6% more than fish fed with the same fat level without DLC. Whole-body protein decreased significantly due to DLC supplementation in fish fed with 150 g kg-1 CF diets. The level of DLC supplementation in Nile tilapia diets is variable and should consider the dietary CF levels, but not DP.

Chung S, Sado R, de Almeida Bicudo Á. Crude fat, digestible protein and DL-carnitine levels in plant-based diets to Nile tilapia Oreochromis niloticus fingerlings. Lat. Am. J. Aquat. Res.. 2020;48(4): 626-636. Available from: doi:10.3856/vol48-issue4-fulltext-2497 [Accessed 27 Sep. 2020].
Chung, S., Sado, R., & de Almeida Bicudo, Á. (2020). Crude fat, digestible protein and DL-carnitine levels in plant-based diets to Nile tilapia Oreochromis niloticus fingerlings. Latin American Journal of Aquatic Research, 48(4), 626-636. doi:http://dx.doi.org/10.3856/vol48-issue4-fulltext-2497