Development of a pelleted feed for juvenile tropical spiny lobster (Panulirus ornatus): response to dietary protein and lipid

Abstract

Critical to the development of a cost‐effective feed for the tropical spiny lobster Panulirus ornatus is knowledge of its response to the protein and lipid (or energy) content of the feed. An experiment of 12 weeks duration was carried out to examine growth responses of juvenile lobsters to pelleted diets that provided six crude protein (CP) levels [320–600 g kg−1 dry matter (DM)] and two lipid levels (nominally 60 and 100 g kg−1 DM). Lobsters (mean initial weight of 1.8 g) were held in groups of nine or 10 animals in 24 × 350 L tanks, fed twice daily at a restricted level, and maintained at 28 °C. Maximal growth responses occurred at dietary CP contents of 474 g kg−1 for the 60 g kg−1 lipid series and 533 g kg−1 for the 100 g kg−1 lipid series. A second experiment, of 4 weeks duration, compared two dietary treatments: a mixture of two of the best diets from the first experiment, and a commercial shrimp (Penaeus japonicus) feed. Lobsters were held under the same experimental conditions as in the first experiment, but were fed to excess twice daily. Their growth was significantly greater (P < 0.05) on the shrimp feed (0.68 g week−1) than on the laboratory‐pelleted diets used in the main study (0.32 g week−1). The results indicate that the optimal dietary protein and lipid content of the diet for P. ornatus is about 530 and 100 g kg−1, respectively.

Effects of mannan oligosaccharide dietary supplementation on performances of the tropical spiny lobsters juvenile (Panulirus ornatus, Fabricius 1798)

“…Several attempts have been made to develop a suitable pellet feed for lobsters in order to replace or supplement the natural food Weight (g) 4 items such as fresh fish, crustaceans and mollusks [16,17,31]. However, there is still no commercial pellet feed successfully developed for tropical rock lobsters.…”

Effect of dietary protein level on growth and energy utilization by Litopenaeus stylirostris under laboratory conditions

“…But, in turn, it explains also the poor FCR that is common in small volume experimental tanks run in clear water, and feed given in excess. That is why a sub-satiation feeding strategy was the rule in nutrition experiments with lobster (Smith et al, 2003). b) during metabolic measurements it is only at microcosm level with a set of 3 shrimp placed in 20-L volume that a fair estimate of intake (here around 0.6g day -1 shrimp -1 ) was obtained to run calculations on energy budget.…”

The effect of dietary carbohydrates on the growth response, digestive gland glycogen and digestive enzyme activities of early spiny lobster juveniles, Jasus edwardsii

“…In fact, previous studies have produced confounded results by varying the amount of protein at the expense of gelatinized starch when investigating the effect of protein inclusion level on growth (Glencross et al. 2001; Smith et al. 2003, 2005; Ward et al.…”