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Effect of concentration of DHA nutrient-enhanced Artemia on the growth and physiology of the ridgetail white prawn, Exopalaemon carinicauda (Decapoda, Caridea, Palaemonidae)

In: Crustaceana
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  • 1 Jiangsu Key Laboratory of Marine Biotechnology / Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, Lianyungang 222005, P.R. China
  • | 2 Co-Innovation Center of Jiangsu Marine Bio-Industry Technology, Lianyungang 222001, Jiangsu, P.R. China
  • | 3 Marine Resource Development Institute of Jiangsu (Lianyungang), Jiangsu, Lianyungang, 222005, Jiangsu, P.R. China
  • | 4 The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, Jiangsu, P.R. China
  • | 5 Ganyu-jiaxin Aquaculture Limited Company of Lianyungang, Lianyungang 222100, Jiangsu, P.R. China
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Abstract

Prawns of the species Exopalaemon carinicauda were fed with Artemia that had been enriched by either 1, or 3, or 5 g/l DHA powder. The feeding dose of Artemia offered to E. carinicauda was calculated according to the water volume, and maintained at 1-3 individuals/ml. After nutritional enrichment, the ratio of DHA content to total fatty acid content in Artemia was the highest (3.32%) after being fed 3 g/l DHA powder. The ratio of DHA content to total fatty acid content in the muscle tissue of E. carinicauda prawns fed with Artemia enhanced with 3 g/l DHA powder was also the highest (4.40%) achieved. Furthermore, when the concentration of fish oil DHA powder was 3 g/l, the survival rate of the prawns was significantly higher than in the control group, with the specific growth rate and weight gain reaching 11.39%/day, and 95.74%, respectively. In addition, the DHA-enhanced Artemia, at different concentrations, increased the non-specific immunity of individuals. The enzyme activity of T-AOC, SOD and AKP in the respective feeding groups of prawns was significantly higher, compared to the control group. Thus, Artemia enriched by 3 g/l DHA powder is proposed as an optimal choice for the offspring breeding of E. carinicauda.

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