Early morphogenesis and larval resources of common carp at Zhaoqing section in the Pearl River
TAN Xi-chang , LI Xin-hui , LIN Jian-zhi, LI Yue-fei, BI Ye, LI Jie , WANG Chao
1. Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China; 2. Zhaoqing Detachment, Guangdong Province Fishery Enforcement Corps, Zhaoqing 526000, China; 3. School of Life Science and Technology, Dalian Fisheries Univ. , Dalian 116023, China
Abstract: The larval resources and samples collected from the collectors embryonic development of common carp Cyprinus carpio were observed held in Zhaoqing section in Pearl River from February to July in 2006. by the It was found that melanic pigmentation appeared before hatching and that the duration of embryonic development was shorter than that in other fishes, indicating that the common carp had good adaptability to environment. The fry with one chamber in their air bladders had total length of 7.5 mm, and about 36 pairs of myomeres, without melanic pigmentation on the pectoral fins. 25 days after hatching, all fins were formed and scales occurred, showing the primary characters in the adult. The common carp spawned several times between 6 February and 24 April in 2006, and the total larval production was estimated to reach 2.39 million. The reproductive ecology and protection strategy were also discussed for common carp.
2009, Vol. 24 
