Effect of Different Concentrations of Classic Taste Substances on Parameters of Feeding Behavior of Rutilus frisii kutum

摘要

Feeding behavior studies of fish are useful to improve of aquaculture and make a proper diet.Parameters of feeding behavior of were determined to different concentrations of classictaste substances (citric acid, calcium chloride, sodium chloride and sucrose) by testing behavioral methods.Behavioral parameters that were recorded include: 1) the number of pellet grasps by fish, 2) retention time ofthe pellet in mouth after the first grasp, 3) retention time of the pellet in mouth during all grasps and 4) numberof pellets consumed. It was found that these compounds created different behavioral responses in kutum.Pellets containing citric acid increased consumption of pellets. Consumption of pellets in concentration of0.026 M of citric acid had significant difference with other concentrations. In citric acid and sucrose, the effectof concentration change on two parameters, consumption of pellets and proportion of the number of pelletsconsumed to the number of grasps was significant, but in calcium chloride and sodium chloride wasn’tsignificant. The effect of concentration change on retention time of pellets after of the first grasp(s) in allsubstance was significant. Concentrations of palatability index and consumption of pellets in sodium chloridehadn’t significant difference together.