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The purpose of this work was to determine the effect of the body weights of day-old Muscovy ducklings onsome slaughter value traits of females aged ten weeks and males aged twelve weeks. The relationships betweenthe body weights of day-old ducklings, daily gains and slaughter value of grown-up ducks were also analyzed.The experimental materials comprised 96 White Muscovy ducklings (46 ♂ and 50 ♀). Males and females werereared separately, to twelve and ten weeks of age respectively. At the completion of the rearing period the birdswere fasted for 12 hours and sacrificed. The carcasses were chilled, weighed and subjected to a detaileddissection. Before statistical calculations were carried out, males and females were divided into five weightgroups, depending on their body weights on the first day following hatching. At the end of the experiment it wasfound that the grown-up ducks once classified as light, medium-heavy and heavy ducklings did not differsignificantly in terms of body weight, mean daily gains, carcass weight, as well as the weight and percentage ofparticular tissue components in a carcass. Low and statistically non-significant values of the coefficients ofsimple correlation and regression suggest a lack of interdependences between the body weights of day-oldducklings and the slaughter value parameters of adult Muscovy ducks. The only exception was the carcassdressing percentage of males, which was found to be significantly negatively correlated with their body weightson the first day of life

Effect of body weights of day-old Muscovy ducklings on growths and carcass traits