Funding for this research was provided by:
Natural Science Foundation of Jilin Province (31672292)
National Natural Science Foundation of China (31800338, 31770445)
Received: 29 February 2020
Accepted: 12 July 2020
First Online: 19 July 2020
Ethics approval and consent to participate
: All protocols were approved by the Ethics and Animal Welfare Committee (no. 2013-6) and by the Institutional Animal Care and Use Committee (HEBTU2013-7) of Hebei Normal University, China, and were carried out under the auspices of scientific collecting permits issued by the Department of Wildlife Conservation (Forestry Bureau) of Hebei Province, China.
: Not applicable.
: The authors declare that they have no competing interests.