Digestive enzymes in marine species. II. Amylase activities in gut from seabream (Sparus aurata), turbot (Scophthalmus maximus) and redfish (Sebastes mentella)

• Published in: Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology
• Main Authors: Munilla-Morán, R., Saborido-Rey, Fran
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier 1996
• Subjects: Carbohydrate digestion; Amylases; Carnivorous marine fish; Stomach; Intestine; Sparus aurata; Scophthdmus maximus; Sebastes mentella; Scophthalmus maximus; Turbot
• Online Access: http://hdl.handle.net/10261/59390; https://doi.org/10.1016/0305-0491(95)02101-9

8 páginas, 3 tablas, 3 figuras The amylase activity of the digestive tract of three carnivorous fish species (Spurus aurata, ScophtMmw maximus and Sebustes me&la) has been studied. The activity of seabream and turbot showed its maximum at neutral pH (7.0-7.5); meanwhile, the activity of redfish had an optimum pH at 4.5-5.0. The to function ranged between 35 and 45°C for the three species. The Arrhenius plots of the intestinal activities of seabream and turbot showed breakpoints at temperatures close to those of their physiological activities. High saline concentrations inhibited the activity of seabream and turbot and activated the activity of redfish. Seabream activity was absolutely dependent on calcium ions. On the contrary, redfish activity was only detected in the absence of this metal. Studies carried out by using several effecters suggested that the activities found in these three species are different. Considering our results from a point of view of the environmental conditions of these species, it might be concluded that enzymatic digestion of dietary carbohydrates proceeds at very low rate. Physiologicat implications are discussed This work was supported b a grant from the Xunta de Galicia XUGA40201 B90. Peer reviewed