The Age Dependent Activities of Digestive Enzymes in Rasbora, Rasbora lateristriata Blkr., (Pisces: Cyprinidae)

Abstract

This study was to evaluate the digestive enzyme activity included a protease (trypsin & chymotrypsin), lipase, carbohydrase (amylase & cellulose) and alkaline phosphatase in Rasbora. This research was carried out using three different ages (2, 4 and 6 months) and in each age consisted of six groups (replicates). In this study 150 fish (±2 months age), 120 fish (± 4 months age) and 90 fish (± 6 months age) were used. All digestion enzyme activity was measured by the spectrophotometric method, except the lipase activity was by the titration method. The results showed that the distinctness of age resulted in a significant difference on total protease, trypsin, lipase, cellulase and alkaline phosphatase (P <0.05), but no significant difference in amylase activity (P> 0.05). Total protease and trypsin activities were higher in fish of age two months than fish age four and six months, but the activity of lipase, cellulase and alkaline phosphatase were higher in fish age of four months compared to two months age fish. Fish, with distinct age has the different nutrient digestion capacity as expressed by differences in the activity of the enzyme digestion, except amylase. These results contribute to the future development of digestive physiology, especially in Rasbora.

Protease and Amylase Activities of Javaen barb (Systomus rubripinnis Val.)

“…Differences in the size of fish give different responses to protease activity, which indicated higher protease activity in small fish than in large fish, but this did not occur in amylase activity. The results of this study are not different from previous studies on Oreochromis niloticus and Rasbora lateristriata (Klahan et al, 2009;Susilo et al, 2018). Changes in protease activity in this study, which are in sync with previous studies, are thought to be related to changes in the growth rate and feeding habits of Javaen barb.…”

Length ratio, histological structure, feed composition, and enzyme activity in the gut of yellow rasbora (Rasbora lateristriata Blkr.)

“…Preliminary studies on the genus Rasbora have been carried out, including those related to the study of morphology and feeding habits [9,10]. Early studies on yellow rasbora had carried out regarding the activity of digestive enzymes [11,12]. However, studies related to the ratio of gut length, intestinal histological structure, feed composition, and protease activity of the foregut had not been carried out on yellow rasbora…”

Monitoring of Enzymatic Activity in the Gastrointestinal Tract of Black Sea Salmon (Salmo labrax Pallas, 1814)

“…In our study, the activities of digestive enzymes in the gastrointestinal tract of Black Sea salmon were found at different levels at all gastrointestinal sections including the stomach, and significantly increased postfeeding. is active in fish with stomach, but not in stomachless fish and Mediterranean fish (Susilo et al 2018). Deguara et al (2003) reported that the activity of pepsin in the digestive tract of gilthead sea bream (Sparus aurata) was only present in the stomach.…”