Nutritional and metabolic responses in common dentex (Dentex dentex) fed on different types and levels of carbohydrates
Authors
Pérez-Jiménez, A. (Amalia); Abellán-Martínez, E. (Emilia); Arizcun-Arizcun, M. (Marta); Cardenete, G. (Gabriel); Morales, A.E. (Amalia Encarnación); Hidalgo, M.C. (María del Carmen)Date
2015-02-07Type
research articleKeywords
common dentexdextrin
intermediary metabolism
maltodextrin
plasma metabolites
pregelatinized starch
Abstract
The present studywas aimed to evaluate the capacity of common dentex (Dentex dentex) toefficiently use dietary
carbohydrates. So, the effects of different type and levels of carbohydrates on growth performance, feed utilization,
fish composition, plasmametabolites and keymetabolic pathways in liver andwhite muscle of common dentex are
presented. Nine isonitrogenous (43%) and isoenergetic (22MJ kg−1) diets were formulated combining three types,
pregelatinized starch (PS), dextrin (Dx) andmaltodextrin (Mx), and three levels (12, 18 and 24%) of carbohydrates.
Growth performancewas not significantly influenced by treatments. The best feed utilizationwas observed in 18%
Mx group. Higher hepatic lipid content was found in fish fed lower dietary carbohydrate levels. PS induced higher
liver and white muscle hexokinase and pyruvate kinase activities compared to the lower values observed for Mx.
Malic enzyme and glucose 6-phosphate dehydrogenase in liver and white muscle were lower in Mx ...