Received: 13 February 2019
Accepted: 26 September 2019
First Online: 23 October 2019
Ethics approval and consent to participate
: All experiments performed were approved by the Animal Care Committee of Hunan Normal University. Approval was acquired for the Administration of Affairs Concerning Animal Experimentation guidelines from the Science and Technology Bureau of China. All fishes were cultured in natural ponds, MS-222 anaesthesia was used to perform all dissections to minimize suffering.
: Not applicable.
: The authors declare that they have no competing interests.