Funding for this research was provided by:
National Natural Science Foundation of China (31730098, 31430088)
Earmarked Fund for China Agriculture Research System (CARS-45)
Hunan Provincial Science and Technology Department (2017NK1031)
Cooperative Innovation Center of Engineering and New Products for Developmental Biology of Hunan Province (20134486)
Key Research and Development Program of Hunan Province (2018NK2072)
Text and Data Mining valid from 2020-03-21
Received: 1 April 2019
Accepted: 11 March 2020
First Online: 21 March 2020
Ethics approval and consent to participate
: All experiments were approved by the Animal Care Committee of Hunan Normal University and followed the guidelines statement of the Administration of Affairs Concerning Animal Experimentation of China. All samples were raised in natural ponds, all dissections were performed under MS-222 anaesthesia, and all efforts were made to minimize suffering.
: Not applicable.
: The authors declare that they have no competing interests.