The performance of microbial flocs produced with aquaculture waste as food for Artemia

Abstract

The performance of microbial flocs as food for Artemia, which were produced using waste from a recirculating aquaculture system stocking European eel (Anguilla anguilla), was investigated in an 18-day feeding trial. Four dietary treatments were used: Chlorella only (diet 1), flocs only (diet 2), and both Chlorella and flocs offered as mixed diets in different proportions (diets 3 and 4). The survival rate of Artemia fed diets 1 and 4 were significantly higher than those fed diets 2 and 3. The survival rate of Artemia fed diet 4 was the highest among the four diets. Individual length (10.02 ± 2.44 mm) and biomass production of diet 3 (3.2 ± 0.40 g L -1 ) were the highest among the four diets. The crude protein contents for Artemia fed diets 2, 3 and 4 were 591. 22 ± 30.15, 580.34 ± 22.42 and 533.27 ± 34.19 g kg -1 , respectively, which were significantly higher than that of diet 1 (461.25 ± 10.33 g kg -1 ). The concentrations of free amino acids and the fatty acid compositions in the four diets were equal, except for the C24:0 content. The highly unsaturated fatty acid concentration of Artemia fed diet 2 was higher than those of the other three diets. It showed that microbial flocs produced from fish waste can be used for Artemia.

Substitution of microalgae by bioflocs as a food source for the brine shrimp Artemia franciscana

“…As bioflocs can be used as a food source for aquatic animals (Crab et al, 2012), their nutritional value is of importance. In this study, no significant difference was observed in the proximate composition of bioflocs with or without halophiles, and values of the different nutrients were in the range reported by previous studies (Hargreaves, 2013; Luo et al, 2017). Algae substitution rate and halophilic addition had no significant effect on the protein and lipid composition of Artemia .…”

“…Some studies, both in laboratory tests and in pond trials, have reported that bioflocs as a food source can be applied successfully in Artemia production (Anh et al, 2009; Gao et al, 2017; Luo et al, 2017; Ronald et al, 2014; Sui et al, 2013; Toi et al, 2013; Wang et al, 2019). However, rarely the addition of halophilic bacteria to a biofloc production system as food for Artemia has been investigated (Gao et al, 2017).…”

“…In the majority of these studies, however, the evaluation of Artemia performance was limited to its growth and survival rate. Only a few studies on reproductive performance (Anh et al, 2009; Ronald et al, 2014; Sui et al, 2013) and proximate composition (Luo et al, 2017; Yao et al, 2018) of Artemia , grown on bioflocs, respectively, in ponds and in the laboratory, were carried out, and these showed better growth, higher biomass and cyst production, improved proximate composition and water quality.…”

“…Artemia is typically cultured with microalgae (Thinh et al, 1999), but it is costly to grow Artemia exclusively on microalgae, either in tank culture systems (Lavens & Sorgeloos, 1991) or in ponds. Some studies, both in laboratory tests and in pond trials, have reported that bioflocs as a food source can be applied successfully in Artemia production (Anh et al, 2009;Gao et al, 2017;Luo et al, 2017;Ronald et al, 2014;Sui et al, 2013;Toi et al, 2013;Wang et al, 2019). However, rarely the addition of halophilic bacteria to a biofloc production system as food for Artemia has been investigated (Gao et al, 2017).…”

The effect of nauplii Artemia sp. enriched with biofloc on the performance of Penaeus monodon and Penaeus vannamei post-larvae

“…Khanjani et al (2015) reported on the capacity for biofloc in culture media to increase P. vannamei growth at the nursery stage. According to the preliminary testing, Artemia utilizes the biofloc as feed (Luo et al, 2017), and there is a need for further research on enrichment with biofloc as feed for P. monodon and P. vannamei post-larvae. Therefore, the aim of this study was to analyze the effect of Artemia enriched with biofloc on the performance of P. monodon and P. vannamei.…”