Path analysis of effects of morphometric traits on body weight in spotted halibut Verasper variegatus at different growth stages
Verasper variegatus is an important representative species of the Pleuronectiformes. It has a fast growth rate, most parts of its body are edible, and the meat is tender and delicious; all these features make V. variegatus a good aquaculture candidate. In order to explore the relationship between morphometric traits and body weight in V. variegatus, full length (FL), body length (BL), body height (BH), head length (HL), head height (HH), caudal pe-duncle length (CL), caudal peduncle height (CH), snout length (SL), and body weight (BW) of V. variegatus at 11, 14, and 17 months of age were measured. Correlation and path analysis were conducted, and the effects of each morphometric trait on body weight were separated into direct and indirect effects. Regression analyses were con-ducted with morphological traits as independent variables and body weight as the dependent variable at each growth stage. The results showed that (1) different morphometric traits had significant path coefficients at each growth stage; at the 11 month stage, the morphometric traits that significantly affected body weight were BH and BL, at the 14 month stage, the significant morphometric traits were FL, BH, and HL, at the 17 month stage, the significant traits were FL and BH. (2) The regression equations at 11, 14, and 17 months of age were Y=-186.412+17.381XBH+10.517XBL, Y =-362.484+13.145XFL+ 20.172XBH+21.199XHL, and Y =-816.147+24.121XFL+40.575XBH, respectively. (3) Besides the morphometric traits included in this study, body thickness is another po-tentially important trait that can affect body weight. This study demonstrated the relationship between mor-phometric traits and body weight. The results provide valuable information and theoretical guidance for V. varie-gatus breeding programs.
国家科技期刊平台
NSTL
万方数据
维普
