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 Natural Science and Technology Major Project (2017NK1031)
Cooperative Innovation Center of Engineering and New Products for Developmental Biology of Hunan Province (20134486)
Received: 6 September 2018
Accepted: 26 December 2018
First Online: 7 January 2019
Change Date: 26 May 2020
Change Type: Correction
Change Details: An amendment to this paper has been published and can be accessed via the original article.
: 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.
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