Effects of different dietary lipid levels and fatty acids profile in the culture of white shrimpLitopenaeus vannamei(Boone) in biofloc technology: water quality, biofloc composition, growth and health

Abstract

The objective of this study was to evaluate the influence of different dietary lipid and fatty acids on the nutritional value of bioflocs used as a feed, as well as shrimp performance and health. A total of 1800 Litopenaeus vannamei juveniles (2.87 ± 0.01 g) were cultured in biofloc technology, with a density of 200 shrimp m−2, and fed with three isoproteic experimental diets at different lipid levels (85 g kg−1, 95 g kg−1 and 105 g kg−1); each treatment was performed in triplicate. After 61 days, no significant difference was observed (P > 0.05) among the water quality parameters. For the shrimp performance, significant difference was observed (P = 0.011) among the values of survival, where treatments with lower lipid levels had higher survival (92.5 ± 3.5% and 91.0 ± 2.5%). Although there are significant differences in survival, no significant differences in the total haemocytes count (THC) were observed. For other growth performance, no differences were observed (P > 0.05). A positive correlation (r = 0.75) has been observed between the dietary oleic acid and bioflocs. The bioflocs showed ‘long‐chain’ polyunsaturated fat acids (lcPUFA), especially arachidonic acid. The shrimp showed similar growth and stayed healthy at the end of the experimental period.

A chromosome-level assembly of the black tiger shrimp (Penaeus monodon) genome facilitates the identification of novel growth-associated genes

“…Similarly, DEGs in lipid metabolism agree with the established knowledge on the importance of fatty acids and lipids to the shrimp growth and immunity (Chen et al, 2015; Duan et al, 2019; Toledo, Silva, Vieira, Mouriño, & Seiffert, 2016). Many fatty acids such as highly unsaturated fatty acids (HUFA) are indeed essential to marine animals since they are the major component of cell membrane (An et al, 2020).…”

Astaxanthin krill oil enhances the growth performance and fatty acid composition of the Pacific whiteleg shrimp, Litopenaeus vannamei , reared under hypersaline conditions

“…Shrimp were fed for 21 days under low (5 g/L), medium (30 g/L) and high ( However, the dietary levels of HUFA in Hurtado et al's (2006) work are much higher than the one adopted in the present study. Toledo, Silva, Vieira, Mouriño, and Seiffert (2016) Gatlin, Lawrence, & Perez-Velazquez, 2003). However, in our work, we could not demonstrate the benefit of fish oil over soybean oil, regardless of water salinity.…”

“…'s () work are much higher than the one adopted in the present study. Toledo, Silva, Vieira, Mouriño, and Seiffert () investigated the effect of increasing the dietary lipid level on the growth and survival of juvenile L. vannamei raised under a biofloc condition with a constant water salinity of 33 g/L. The authors achieved dietary lipid levels of 87.8, 96.5 and 104.8 g/kg through a higher inclusion of soybean, poultry and corn oils.…”

Dietary lipid requirement of whiteleg shrimp Litopenaeus vannamei juveniles cultured in biofloc system

“…The benefits of using biofloc technology (BFT), such as improved water quality, have been reported in the culture of shrimp species with minimum or zero water exchange (Crab et al, ; Martínez‐Cordova, Emerenciano, Miranda‐Baeza, & Martinez‐Porchas, ; Toledo et al, ; Yun et al, ). In the present study, ‐N and ‐N concentrations were similar or even higher than those reported in other studies (Khanjani, Sajjadi, Alizadeh, & Sourinejad, ; Toledo et al, ; Yun et al, ), and still considered optimal for whiteleg shrimp culture (Cuzon et al, ).…”