Morphological comparison of embryonic and post-embryonic developments in mandarinfish Siniperca chuatsi,spotted mandarinfish Siniperca schezeri and their hybrids
LIU Yi-hui1,CHEN Yong-le1,ZHU Xin-ping1,XIE Gang1,HUANG Wei-ping2, HONG Xiao-you1,LI Hai-chao2,ZHANG Wei-kang3,CHEN Shao-hua4
1.Pearl River Fisheries Research Institute,Chinese Academy of Fishery Sciences,Guangzhou 510380,China;2.Foshan Nanhai District Agricultural Technology Promotion Center,Foshan 528200,China;3.Xiqiao Town Office of the Rural Work,Nanhai District,Foshan City,Foshan 528211,China;4.Huaji Fish Hatchery,Xiqiao Town,Nanhai District,Foshan City,Foshan 528203,China
Abstract: Embryonic and post-embryonic developments were observed and compared in mandarinfish Siniperca chuatsi,spotted mandarinfish Siniperca schezeri and their hybrids induced to spawn and artificially fertilized at room temperature.The spotted mandarinfish and the hybrids(1.86 mm±0.07 mm in diameter)(spotted mandarinfish♀×mandarinfish♂)had larger eggs than the mandarinfish(1.08 mm±0.06 mm in diameter)did.Under the same environmental conditions,the mandarinfish,spotted mandarinfish and their hybrids usually had the same embryonic development procedures as the females,or,the hybrids(spotted mandarinfish♀×mandarinfish♂)as the spotted mandarinfish,and the hybrids(spotted mandarinfish♂×mandarinfish♀)as the mandarinfish.The embryos of the mandarinfish and the hybrids(spotted mandarinfish♂×mandarinfish♀)were hatched in about 34 h at 28.0-30.0℃,while the embryos of the spotted mandarinfish and the hybrids(spotted mandarinfish♀×mandarinfish♂)were hatched in about 91 h at 26.5-30.0℃.There were larger newly hatched larvae(about 4.60 mm±0.07 mm in total length)in the spotted mandarinfish and the hybrids(spotted mandarinfish♀×mandarinfish♂)than those in the mandarinfish and the hybrids(spotted mandarinfish♂×mandarinfish♀)(about 4.00 mm±0.05 mm in total body length).
2012, Vol. 27 
