Effect of Lysolecithin Replacement of Soybean Lecithin Oil on the Survival, Growth Performance and Immunity of Macrobrachium nipponense Juveniles
Effect of Lysolecithin Replacement of Soybean Lecithin Oil on the Survival, Growth Performance and Immunity of Macrobrachium nipponense Juveniles
Chang Guoliang1,2*, Pan Zhengjun1,2, Zhu Chuankun1,2, Zhao Haitao1,2,
Yan Zhang3, Summaya Rajput4 and Laghari M. Younis4*
ABSTRACT
Macrobrachium nipponense is called the oriental river prawn or blue prawn and is an important aquaculture species in China, Japan and Southeast Asian countries. But up to now, no special commercial formulated feed has been developed for M. nipponense that meets its nutritional requirements. Generally, soybean lecithin oil (SO) is used as a major source of phospholipids and an emulsifier in aquatic animal feed, which is very costly. In recent years, as a good emulsifier, lysolecithin attracted increasing interest in fish species. In the present study, lysolecithin as a substitute for SO was used to observe the growth and immune performance of M. nipponense. Four types of diets containing similar basal compositions but differing in lysolecithin ratios were used. lysolecithin 0.1% was added to all diets except the control diet (0.0% lysolecithin). The contents of SO in the four diets(Diet# 1, Diet# 2, Diet# 3 and Diet# 4) were 2%, 1%, 0.5% and 0.0%, respectively. Furthermore, antioxidant enzyme activity (T-SOD, AKP, ACP and POD) in the hepatopancreas, serum and muscle were determined. The maximum final weight gain rate (WGR) and standard growth rate (SGR) observed with Diet# 4, showed average increases of 52.51±7.91 and 0.70±0.086 g, respectively. This result suggests that the SGR and WGR of prawns fed a diet containing 0% SO were higher than those of the other experimental groups. Furthermore, the survival rate also increased by decreasing the SO level in the feed contents. The highest relative hepatosomatic index (HSI) was also observed in Diet# 2. Significant changes were found in T-SOD, AKP and ACP enzyme activity of M. nipponense different organizations. The lowest level of serum T-SOD was in prawns fed with Diet #4, while the highest level of ACP and AKP was all in prawns fed with Diet# 3 (P < 0.05). This study suggested a diet containing 0.1% lysolecithin, replacing the appropriate amount of SO, can improved growth performance and immunity of M. nipponense. Therefore, lysolecithin has a good application potential to replace a certain amount of SO in the diet of M. nipponense.
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