Study on biological characteristics, production capacity and economic efficiency of the eastern spot-billed duck (anas poecilorhyncha zonorhyncha) raised in households in Ninh Binh Province
DOI:
https://doi.org/10.51453/2354-1431/2020/372Keywords:
Biological characteristics, production capacity, growth, the wild ducksAbstract
The young Eastern spot-billed ducks raised in households in Ninh Binh province have brown-gray on the upperpart from the head to tail. The neck and breast feathers are yellow and the back has typical yellow spots. The head has a yellow stripe down the neck and the eyes have a black line extending back. The legs are black. The adult ducks have gray striped body and a black speculum with a yellow tip. The tail feather has dark brownish and light brown edge, the wings are light blue. The male’s head has two white stripes. The feathers under neck is white, the eyes have dark brown with black line feathers extending to the back. They have upturned tail with a few curly feathers and typical sound. The female has a smaller head with light brown eyes and quack-quack sound. The tail has straight feathers. The survival rate of the Eastern spot-billed ducks until 21 weeks of age is over 98%. The body weight at birth was about 42g. The weight of an adult male and female is 1,452.21g and 1,264.92g, respectively. The amount of feed consumption to increase the weight of 1 kg from birth to 21 weeks of age is 7.43 kg and 8.07 kg in male and female, respectively. The percentage of carcasses as well as the percentage of thigh meat plus breast meat between males and females is 63.80 - 62.94% and 48.23 - 51.30%, respectively.
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