Effects of Dietary Carbohydrate Levels on the Growth and Glucose Metabolism of Juvenile Swimming Crab, Portunus trituberculatus

This experiment was conducted to evaluate the effects of different carbohydrate levels on growth performance, glycogen accumulation in tissue, enzyme activities, and expression genes related hepatopancreatic glucose lipid metabolism insulin signaling pathway swimming crab, Portunus trituberculatus for 8 weeks. The results indicated that crabs fed with 60.0 g kg-1 diet exhibited highest final body weight (FBW), percent gain (PWG), specific rate (SGR) among all treatments. FBW, PWG, SGR significantly decreased when dietary exceeded 240.0 kg-1. Light microscopy showed excessive will lead vacuole, tubule lysis, droplets hepatopancreas. Expression involved into transport, metabolism, insulin-like hepatopancreas were influenced by levels. In general, present study demonstrated optimal could not only improve PWG but also influence glucose, lipid, metabolism. actual level estimated be 87.8-98.4 based broken-line second-order polynomial regression analysis between against juvenile trituberculatus.