Evaluation of growth and fatty acid profile of Nile tilapia (Oreochromis niloticus) fed with Schizochytrium sp.

Abstract

The objective of this study was to evaluate growth, body chemical composition and lipid profile of Nile tilapia juvenile fed with Schizochytrium sp. Two hundred and forty Nile tilapia (Oreochromis niloticus) juvenile (1.33 ± 0.11 g) were distributed in 20 aquariums, at the density of 12 fish per aquarium. The juvenile were fed with five levels of Schizochytrium sp.: Control (0 g/kg of Schizochytrium sp. in feed); AS10 (10 g/kg of Schizochytrium sp. in feed); AS20 (20 g/kg of Schizochytrium sp. in feed); AS30 (30 g/kg of Schizochytrium sp. in feed) and AS40 (40 g/kg of Schizochytrium sp. in feed). The inclusion of Schizochytrium sp. increase the body weight, weight gain, final biomass and biomass gain of tilapia juvenile. The body crude protein of tilapia was increased after addition of microalgae. Juvenile lipid profile also was influenced when fed with 40 g of Schizochytrium sp. per kg and have it levels of omega‐3 and docosahexaenoic acid (DHA) increased, and omega 6:3 ratio decreased. Tilapia juvenile fed with Schizochytrium sp. per kg have better growth, omega‐3 and DHA levels rising in the body, being a considerable source of fatty acids for human nutrition. Levels above 20 g of Schizochytrium sp. per kg in the feed favour the increase of protein in Nile tilapia body.

Effect of dietarySchizochytriumsp. oil as an n‐3 long‐chain polyunsaturated fatty acid source on growth performance, lipid metabolism and antioxidant status in juvenile grass carp (Ctenopharyngodon idellus): A comparative study with fish oil

“…We found a significant decrease in crude lipid content of whole body in fish fed dietary FO, SO and WGO compared to those of control group, the crude protein was affected by dietary n‐3LC PUFA source, and the highest content of crude protein in muscle and whole body was appeared in SO group; similarly, the Sc in the diet improved the level of protein in Nile tilapia whole body (dos Santos et al, 2019; Sarker, Kapuscinski, et al, 2016), and this was also in line with a study that Sc‐containing diet stimulated the development of muscle or tissue in Atlantic salmon (Kousoulaki et al, 2016). Our results may suggest that the high DHA level of Sc oil in SO group may save the energy consumed by de novo synthesis of DHA compared to fish oil and then use this energy for protein synthesis and growth.…”

“…Sarker, Kapuscinski, et al (2016) observed that Nile tilapia fed high dietary Sc (without fish oil) presented high levels of DHA and n‐3 LC‐PUFA in the muscle. Juvenile tilapia fed with 40 g/kg Sc obtained better growth, n‐3 LC‐PUFA and DHA levels increased in the muscle (dos Santos, Schorer, Moura, Lanna, & Pedreira, 2019). Diet contained 20 g/kg Sc could notably increase the proportion of n‐3 LC‐PUFA in edible tissues of channel catfish ( Ictalurus punctatus ) without affecting flavour and quality (Li, Robinson, Tucker, Manning, & Khoo, 2009).…”

“…observed that Nile tilapia fed high dietary Sc (without fish oil) presented high levels of DHA and n-3 LC-PUFA in the muscle. Juvenile tilapia fed with 40 g/kg Sc obtained better growth, n-3 LC-PUFA and DHA levels increased in the muscle (dos Santos, Schorer, Moura, Lanna, & Pedreira, 2019).…”

Effects of Feeding Rates on Growth, Digestive Enzyme Activity, Serum Biochemical Parameters, and Body Composition of Juvenile, Genetically Improved, Farmed Nile Tilapia Reared in an In‐Pond Raceway Recirculating Culture System

“…; dos Santos et al. ). The GIFT fed 3% BW/d had lower linoleic acid content than those fed 4% and 5% BW/d.…”

Effects of the defattedSchizochytriumsp. on growth performance, fatty acid composition, histomorphology and antioxidant status of juvenile mirror carp (Cyprinus carpiovar.specularis)

“…The supplementation of 29.8 g/kg Schizochytrium sp. in the feed can increase the protein content in the whole body of juvenile tilapia ( O. niloticus ) (Dos Santos et al, 2019). Similarly, the supplementation of Spirulina platensis in the diet of hybrid red tilapia ( O. mossambicus × O .…”