Effects of morphological traits on the body mass of Leiocassis longirostris

Abstract:

To explore the effects of morphological traits on the body mass of Leiocassis longirostris, 115 × 14-month-old samples were randomly selected. A total of 12 morphological traits including body mass, total length, standard length, body height, body width, head length, head height, head width, snout length, caudal peduncle length, caudal peduncle depth, and trunk length were measured and analyzed using correlation analysis, path analysis, and multiple regression analysis. The results showed that the correlation among these 12 morphological traits were all very significant (P<0.01). The path analysis results showed that there were five morphological traits, including total length, standard length, head width, snout length, and caudal peduncle depth that reached a significant level (P<0.05). Among these, total length had the greatest direct effect on body mass. The common determinant coefficient of total length, standard length, head width, snout length, and caudal peduncle depth was 0.911, which was consistent with the results of the path analysis, indicating that these five morphological traits were the main factors affecting the body mass of L. longirostris. The multiple regression analysis established a linear regression equation with body mass (Y) as the dependent variable and total length (X1), standard length (X2), head width (X7), snout length (X8), and caudal peduncle depth (X10) as the independent variables, which was presented as Y=‒301.368+5.888X1+5.988X2+21.482X7+16.408X8+34.878X10 The results of this study provide a theoretical basis for the breeding of growth-related traits of L. longirostris and is of great significance for the breeding of individuals of this species.