Funding for this research was provided by:
National Waterfowl Industry Program in China (CARS-42-15)
National Natural Science Foundation of China (31802080)
Guangdong Provincial Natural Science Foundation for Starting Ph.D (2017A030310398, 2018A030310202)
Article History
Received: 31 October 2018
Accepted: 30 January 2019
First Online: 14 February 2019
Compliance with Ethical Standards
:
: The authors declare that they have no competing interests.