Abstract
In this study body weight and six body measurements namely body length, breast circumference, thigh length, shank length, total leg length and wing length of 150 twenty weeks old male and female Nigeria indigenous muscovy duck, reared under semi intensive system, were subjected to factor analysis. The objectives of the study were to evaluate the main sources of shared variability among body shape characters, to deduce the factors that describe these characteristics and to quantify sex differences in morphometric size and shape in adult muscovy duck. Variation occur in descriptive statistics between male and female traits in favour of the male in almost all traits except shank length. Magnitude of correlation also differ between sexes. Common factor variability in the measured traits in both sexes were accounted for by two factors and are about similar. Body conformation and shape appears to be controlled by common and unique factors. Communalities ranged from 0.671 for shank length to 0.987 for body length.
Highlights
Biometrical variation into size and shape component in domesticated animal has been an area of growing interest to animal breeders
Morphological measurement have been found useful in contrasting size and shape of animal (Mckraken et al, 2000; Latshaw and Bishop 2001) and to estimate body weight
Sex – influence (P
Summary
Biometrical variation into size and shape component in domesticated animal has been an area of growing interest to animal breeders. These concepts are fundamental to the analysis of variation in the animals. Morphological measurement have been found useful in contrasting size and shape of animal (Mckraken et al, 2000; Latshaw and Bishop 2001) and to estimate body weight. Correlation between body dimensions may be different if the dimensions are treated as bivariates rather than multivariates. This is because of the interrelatedness or lack of orthogonality (collinearity) of the explanatory variables. Since body measurements are interrelated both genetically and phenotypically
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