Investigations on the Digestive Enzyme Profile of Some Shrimp Feeds

Abstract

Proteolytic, lipolytic and amylolytic activities were determined in four feeds viz, clam meat (NFI) and shrimp meat (NF2) as natural feeds: Moina (LFI and Arrenlia nauplii (LF2) as live feeds: a laboratory formulated (CFI) and a commercial brand (CF2) and two micro-particulate feeds (MPI and MP2) as artificial feeds. High protease activity (10.70 units/min) was recorded in the feed CF2 followed by the micro-particulate feeds (9.35 unitslmin). High amylase activity of 3.72 unitslmin was recorded in clam meat followed by the agar-gelatin micro-particulate feed in which the activity corresponded to 2.2 units/min. The highest esterase activity of 2.37 units/min was obtained in the commercial (CFZ) formulated feed. Activities were recorded in most feeds showing reactivation or incomplete denaturation in the formulated feeds.