Effects of dietary protein and lipid levels and protein to energy ratios on growth performance and feed utilization of hatchery-reared juvenile spotted babylon (Babylonia areolata)

Abstract

A 120-day feeding trial was designed to determine the effects of different dietary protein and lipid levels and protein to energy ratio (P:E) on growth performance and feed utilization of hatchery-reared juvenile spotted babylon, Babylonia areolata, cultured under a flow-through seawater system. Six diets were formulated to contain three protein levels (18, 28, and 36%) and two lipid levels (10 and 15%) in a 3 9 2 factorial design with three replicates to provide six different dietary P:E ratios (50.17, 49.09, 68.50, 65.85, 88.66, and 85.36 mg protein/kcal). Each replicate was stocked with 50 snails (0.12 ? 0.01 g, initial weight) and fed to satiation once daily. The results showed that survival was above 96% at the end of the feeding trial in all groups and was not affected by either dietary protein level or dietary lipid level. The highest significant (P \ 0.05) growth and feed utilization were observed for juveniles fed diet with a P:E ratio of 88.66 kcal g -1 diet. With respect to dietary protein and lipid levels, the highest (P \ 0.05) values for growth and feed efficiency were observed for snails fed a diet containing 36% protein level and the same trend was observed for snails fed a diet with 10% lipid level. This results indicated that the diet containing 36% protein and 10% lipid level with a dietary P:E ratio of 88.66 mg protein/kcal would be suitable for optimum growth and feed utilization of B. areolata juveniles.

Growth, food efficiency, and biochemical composition of juvenile spotted babylon Babylonia areolata (Link) fed on conventional trash fish and a formulated moist diet

“…The snails accepted the formulated diet readily and B. areolata, fed the formulated moist diet achieved a high growth (1.08 g per month), survival (95%) and FCR (0.95), with no significant difference compared to those of snails fed the traditional trash fish. Our findings were better compared to those of Chaitanawisuti et al (2010) who reported that highest values for growth and food efficiency were observed for snails fed a diet containing 36% protein level, and the same trend was observed for snails fed a diet with 10% lipid level. This result indicated that the diet containing 36% protein and 10% lipid level with a dietary P:E ratio of 88.66 mg protein/kcal would be suitable for optimum growth and food utilization of B. areolata juveniles.…”

“…On-growing efficiency (growth and feed efficiency) is an important criterion that must be considered for aquaculture of the target species, and therefore, it is important to understand the nutritional requirements of a species to develop effective foods. In addition, diet has also been shown to have an impact on the nutritional composition and taste of cultured animals (Britz 1996;Chen et al 2005;Woodcock and Benkendorff 2008;Chaitanawisuti et al 2010;Zhou et al 2007a, b). Consequently, determination of the biochemical composition of spotted babylon fed on different diets could be useful for optimizing the diet which in turn may help produce a high-quality product.…”

Growth and feed utilisation of juvenile greenlip abalone (Haliotis laevigata) in response to water temperatures and increasing dietary protein levels

“…In contrast, superior protein deposition was previously reported in 1-year old greenlip abalone fed increasing dietary protein levels at 22°C . At sub-optimal water temperatures, below 22°C, abalone may deaminate excess protein to supply energy for metabolism rather than protein deposition and tissue growth, subsequently resulting in increased feed costs and ammonia excretion (Chaitanawisuti et al, 2011). A recent finding by Duong et al (2014), from samples collected from the same animals used in the current study, indicated that ammonia excretion was significantly higher when abalone were fed diets containing 36% CP compared to abalone fed 27% CP, further supporting this hypothesis.…”

Effects of dietary protein and lipid levels with different protein-to-energy ratios on growth performance, feed utilization and body composition of juvenile red-spotted grouper,Epinephelus akaara

“…To minimize the use of high‐priced protein as an energy source, it has been recommended to provide adequate energy with dietary lipids or carbohydrates in fish feeds. However, an excess energy could cause fat deposition and decrease food consumption, resulting in poor growth performance in fish (Ai et al., ; Chaitanawisuti, Kritsanapuntu, & Santaweesuk, ). Thus, an adequate protein and lipid level with an appropriate P:E ratio in the diet are important for developing a feed for any new species.…”