Effect of Restricted Feeding to Nutrients Utilization of Spiny Lobster (Panulirus homarus)

Abstract

Restricted feeding has been known to have an impact on reducing feed usage without disrupting the growth of spiny lobster (P. homarus). As growth was affected by nutrients i.e protein, lipid, and carbohydrate from feed, informations about the ability of spiny lobster to utilize and store nutrients during feed restricted condition is important. Nutrient utilizations of spiny lobster can be described by digestive enzymes activities and nutrient retentions. Spiny lobster (P. homarus) measuring 50.0 ± 10.0 g was reared for 32 days in a restricted feeding regime by fasting. Lobsters were fasted at intervals of 1 fasting day/1 day of feeding, 1 fasting day/2 days of feeding, and fed daily. At the end of cultivation, spiny lobster (P. homarus) that fed daily showed the highest protease (0.019 IU/ml), lipase (0.02 IU/ml), and amylase (0.66 IU/ml). High protein retention (25.1%) and fat retention (36.5%) were found in spiny lobster (P. homarus) reared with restricted feeding in 1 day feeding/1 day fasting cycle. Feeding management with a restricted feeding system allowed the spiny lobsters (P. homarus) to utilize nutrients from the feed more optimally.