Abstract: The morphological and histological development of digestive system was observed in larval Pacific cod Gadus macrocephalus from 1 to 50 days post hatching (DPH) under a light microscope. No differentiation in the digestive system was found at hatching, the mouth and anus were not opened, and liver and pancreas were appeared. The mouth gape was formed at 3 DPH and the intestine began to be differentiated. At 6 DPH, the digestive tract was consisted of buccopharynx, oesophagus, stomach anlage, intestine and rectum, with movable premaxilla and maxilla, with initial feeding capacity. The yolk sac was depleted completely at 12 DPH, and the intestine folds and mucus cells increased progressively in number, with almost complete digestive system and onset of exogenous nutrition. The intestine was spiral in shape, and the digestive organs and associated glands became further development steadily, similar to that in adult Pacific cod at 47 DPH. The findings provide a theoretical basis for the scientific management and nutrition for Pacific cod larva rearing.
胡盼, 宫雪, 韩雨哲, 姜志强, 潘金露. 太平洋鳕仔鱼消化系统发育形态学和组织学观察[J]. 大连海洋大学学报, 2015, 30(3): 243-247.
HU Pan, GONG Xue, HAN Yu-zhe, JIANG Zhi-qiang, PAN Jin-lu. Ontogenetic morphological and histological development of
digestive system in larval Pacific cod Gadus macrocephalus. Journal of Dalian Ocean University, 2015, 30(3): 243-247.
2015, Vol. 30 
