Embryonic and larval development of a hybrid between kelp grouper Epinephelus moara female x giant grouper E.lanceolatus male using cryopreserved sperm

作者：Chen, Zhang-Fan; Tian, Yong-Sheng^*; Wang, Peng-Fei; Tang, Jiang; Liu, Jiang-Chun; Ma, Wen-Hui; Li, Wen-Sheng; Wang, Xiao-Mei; Zhai, Jie-Ming

来源：Aquaculture Research, 2018, 49(4): 1407-1413.

DOI：10.1111/are.13591

• embryos and larvae
• Epinephelus lanceolatus
• Epinephelus moara
• hybridization
• sperm cryopreservation
• survive and growth

Hybridization was used to take advantage of desirable traits in offspring. In the present study, we applied the cryopreserved Epinephelus lanceolatus sperm into interspecific hybridization with E.moara. Successful hybridization between these two species was achieved and cultured in 23-24 degrees C seawater (34 parts per thousand). There was no difference in survival rate between hybrid (E.moara female x E.lanceolatus o) and non-hybrid (E.moara female x E.moara male) at 24hrs post hatch (HPH), but less hybrid (14.35 +/- 8.02%) hatched than non-hybrid (93.60 +/- 1.65%), which might be due to irregularity cell cleavage and skeletal deformities from the formation of embryonic body to the later embryonic development. Similar phenomenon was found in hybrid embryos from fertilization with fresh sperm, indicating that species variations between parents, rather than cryopreserved sperm, resulted in deformities in embryos. Mean hatch time of the hybrid was 1hr faster than that of E.moara. The hybrid was 1.95 +/- 0.06mm in total length when newly hatched and reached 38.00 mm at 58 days post hatch (DPH), which showed faster growth than E.moara (recorded in the previous study). Considering its faster growth, E. moara x E. lanceolatus hybrid was a potential breeding production in aquaculture. Over 212,000,000 larvae have been produced and launched in the market since 2015. The results of this study also shed some lights on further comparative studies in grouper hybrid performance.

• 出版日期2018-4
• 单位上海海洋大学; 中国水产科学研究院