Correlation analysis of fish growth performance and serum hormone and digestive enzyme activities of juvenile pearl gentian grouper (Epinephelus lanceolatus♂×E. fuscoguttatus♀) fed with different protein levels diets

• GUO Xinwei, 
• TAN Beiping, 
• CHI Shuyan, 
• DONG Xiaohui, 
• YANG Qihui, 
• LIU Hongyu, 
• ZHANG Shuang