Abstract: The embryonic development and initial feeding of larvae were observed in large icefish Protosalartx hyalocranius under a Pixera Penguin 600CL digital camera system.The fertilized eggs were hatched in 852 hours at water temperature of 4-9℃and the embryonic development was divided into 9 physiological stages,namely 30 developmental substages.The newly hatched larvae had average body length of 4.76 mm and total body length of 4.86 mm.The yolk sac was exhausted about 20 days after hatching,and the fry with body length of 5.85 mm and total body length of 6.09 mm was found to swim normally.The larvae fed on phytoplankton as weaning food in the 10-20 initial feeding days under unfed condition,and began to feed rotifers actively 20-40 days after initial feeding. Microscopic observation revealed that the shells and resting eggs of the rotifers were not digested by the larvae.
施炜纲, 徐东坡, 刘凯, 段金荣, 张敏莹. 大银鱼的胚胎发育及仔鱼习性[J]. 大连海洋大学学报, 2011, 26(5): 391-396.
SHI Wei-gang, XU Dong-po, LIU Kai, DUAN Jin-rong, ZHANG Min-ying. The embryonic development and habit of larvae in large icefish Protosalartx hyalocranius. Journal of Dalian Ocean University, 2011, 26(5): 391-396.