Palm oil in diets for Nile tilapia (Oreochromis niloticus) post-larvae

Luiz Fernando De Souza Alves,Jakeline Marcela Azambuja De Freitas,Aldi Feiden,Wilson Rogério Boscolo,Matheus Dos Santos Cardoso,Joana D’Arc Maurício Rocha

doi:10.33448/rsd-v10i14.22099

Luiz Fernando De Souza Alves, Jakeline Marcela Azambuja De Freitas + Show 4 more

Open Access

https://doi.org/10.33448/rsd-v10i14.22099

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Abstract

The objectives of this research were to evaluate the effects of the substitution of soybean oil by palm oil in the diet of Nile tilapia (Oreochromis niloticus) post-larvae, to observe the performance and attractiveness of the feed, and to evaluate the fatty acid methyl esters profile of palm oil. Four hundred Nile tilapias were used after hatching (seven days old), distributed in 20 fiberglass tanks of 20 L each. The experiment was carried out in a completely randomized design with five treatments and four replicates. The treatments consisted of different levels of inclusion of palm oil, which were: 0.0, 1.5, 3.0, 4.5 and 6.0 %. The concentration of monounsaturated and saturated fatty acids in palm oil was measured, resulting in high amounts of palmitic, oleic and linoleic fatty acids. Significant differences were observed for the variables final weight, total length, weight gain, specific growth rate and condition factor. No significant differences were observed for palatability of the diets. It is concluded that the inclusion of 3% or more palm oil in substitution of soybean oil during the masculinization stage of tilapia larvae contributes to the improvement of productive parameters.

Highlights

IntroductionAmong the commercially grown tilapia species, Nile tilapia (Oreochromis niloticus) is the most widely used in intensive systems in Brazil
Fish farming in Brazil has been growing steadily and, among freshwater species, tilapia is responsible for 60% of the national production, with more than 486 thousand tons produced in 2020 (Peixe BR, 2021).Among the commercially grown tilapia species, Nile tilapia (Oreochromis niloticus) is the most widely used in intensive systems in Brazil
The inclusion of palm oil in the experimental diets positively influenced the variables of final weight (FW), total length (TL), weight gain (WG), specific growth rate (SGR), and condition factor of Nile tilapia

Summary

Introduction

Among the commercially grown tilapia species, Nile tilapia (Oreochromis niloticus) is the most widely used in intensive systems in Brazil. This is due to its rapid growth and good quality meat (Furuya et al, 2008). The use of lipids in fish diet has the special advantage of being a low-cost energy supply (Boscolo et al, 2008; Juancey, 2000). In addition to providing substrates for energy production, lipids are sources of essential fatty acids and are structural components of cell membranes acting as transporters for other nutrients such as fat-soluble vitamins (Garcia et al, 2013). Deficiency of fatty acids can impair production, reducing growth and increasing mortality (Garcia et al, 2013; Glencross, 2009)

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