黄颡鱼和青梢红鲌形态学参数、营养组成和A/E比值的比较研究

he present experiment was undertaken to compare the differences of morphometrical parameters, nutritional composition and A/E ratios between Pelteobagrus fulvidraco and Erythroculter dabryi. P. fulvidraco was characterized by high viscerosomatic index, hepatosomatic index, intraperitoneal ratio and gonadosomatic index than in E. dabryi (P < 0.05). The fat contents of whole body, muscle, ovary for P. fulvidraco were higher than that of E. dabryi (P < 0.05) ; protein contents of whole body and ovary in E. dabryi were higher than in P. fulvidraco (P < 0.05). Some differences existed in fatty acid profiles of muscle and ovary of two fish species (P < 0.05). Amino acid compositions of whole body and muscle were similar between P. fulvidraco and E. dabryi. However, relative variation existed in amino acid profiles in ovary for the two fish (P < 0.05). The A/E ratios of whole body, muscle were similar between the two species and there were wide variations in A / E ratios based on ovarian amino acid profiles. The present study provided important information of nutritional composition and the estimated requirements for essential amino acids calculated from A/E ratios of whole body, muscle and ovary for the two fish species examined.