1. Collaborative Innovation Center of Marine Science and Technology, Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, College of Marine Science, Hainan University, Haikou 570228, P. R. China
2. College of Animal Science and Technology, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
3. College of Animal Science and Technology, Key Laboratory of Livestock Biology, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China