Funding for this research was provided by:
National Natural Science Foundation of China (31801989)
Received: 13 August 2020
Accepted: 14 December 2020
First Online: 2 January 2021
Ethics approval and consent to participate
: Non-invasive sample collection without hunting of experimental animals was used in this study. Permission was obtained from the Shengjin Lake National Nature Reserve.
: Not applicable.
: The authors declare that they have no competing interests.