1. Aquaculture Research Center, Kentucky State UniversityFrankfortKentucky40601USA
2. Zoology DepartmentUniversity of OklahomaNormanOklahoma73019USA
3. Joint Laboratory of Genetics, Physiology, and Reproduction of FishInstitute of Animal Physiology and Genetics, University of South Bohemia, Research Institute of Fish Culture and HydrobiologyVodnany38925Czech Republic