Estimation and analyzing sexual dimorphism for body weight and carcass traits of white and brown Domyati ducks

Abstract

The difference in body weight between males and females, hereafter
called sexual dimorphism, the present study aimed to study the
difference between white and brown Domyati duck for sexual
dimorphism. At marketing age (8 wks) 16 (8 male + 8 female) brown
and 14 white (7 male + 7 female) Domyati ducks, were used to
estimate the body weight and carcass traits as non-edible meat parts
(blood- feather- head- legs – viscera), edible meat parts (dressed
carcass- liver- gizzard- heart), muscles (major – minor- breast muscles –
thigh – drumstick), abdominal fat, gizzard fat, skin, wings, skeleton, and
neck. Our results showed that the white Domyati ducks were
significantly higher for sexual dimorphism for all traits compared to
brown Domyati ducks. There was a significantly high positive
correlation between body weight and abdominal fat, major, minor,
breast muscles, thigh, and drumstick in male and female brown
Domyati ducks. The same trend was noticed for white male and female
Domyati ducks. However, the spleen had a lower positive correlation
with body weight on both sexes of brown Domyati ducks, while, the
spleen recorded a higher positive correlation with body weight of both
sexes of white Domyati duck strain. In conclusion, there was a
significant difference between white and brown Domyati ducks for
some traits.