Stimulating effects of pond water on digestive enzyme activity in the Pacific white shrimp,Litopenaeus vannamei(Boone)

Abstract

Crude enzyme extracts were obtained from the digestive glands of Paci®c white shrimp, Litopenaeus vannamei (Boone), reared in oligotrophic well water and eutrophic shrimp pond water to compare digestive enzyme activity between the two groups. Speci®c activities of serine protease, collagenase, amylase, cellulase, lipase and acid phosphatase were signi®cantly higher (P < 0.01) in pond water-reared shrimp (PW shrimp) than in well water rearedshrimp (WW shrimp). For most enzymes assayed, speci®c activity was more than two times higher in PW shrimp, and cellulase activity was over six times higher. In contrast, chitinase activity was signi®cantly higher (P < 0.001) in WW shrimp. Higher speci®c activity of most digestive enzymes in PW shrimp was probably due to natural productivity in the pond water that served as a source of organic substrates, and this increased activity may contribute to the growth-enhancing effect of shrimp pond water.

Effect of biofloc technology on growth, digestive enzyme activity, hematology, and immune response of genetically improved farmed tilapia (Oreochromis niloticus)

“…It is possible that biofloc plays a role in stimulating the activities of digestive enzymes (Moss et al, 2001;Xu et al, 2012a;Xu et al, 2012b). In addition, Xu and Pan (2012) found that biofloc displayed relatively high amylase activities, which may account for the increased intestinal amylase activity of fish growing in the BFT treatment in this study.…”

Effect of De-Oiled Oil Palm Kernel Meal Based Biofloc System on Growth and Digestive Enzyme Activity of Pacific White Shrimp, Litopenaeus Vannamei

“…Shrimps grown in biofloc are speculated to change digestive enzyme activities in response to the changes in the diet conditions (Le Moullac et al, 1996;. The biofloc is presumed to enhance the production or activity of the digestive enzymes which in turn contributed to the better growth and feed utilization (Moss et al, 2001;Xu et al, , 2013.…”

Development of Biopolymers as Binders for Feed for Farmed Aquatic Organisms

“…Consequently, from the digestive enzyme profile it is possible to predict the ability of the species to use different nutrients. Since the digestive enzyme activity is high for those substrates that are more common in the diet (Moss et al, 2001) there is a common belief that the activity of digestive enzymes can be boosted by providing certain nutrients into the diet for an adequate amount of time.…”