TY - JOUR
T1 - A histological study on the development of the digestive system of Pseudosciaena crocea larvae and juveniles
AU - Mai, K.
AU - Yu, H.
AU - Ma, H.
AU - Duan, Q.
AU - Gisbert, E.
AU - Infante, J. L.Zambonino
AU - Cahu, C. L.
N1 - Funding Information:
This work is supported by National Natural Science Foundation of China (Nos. 51272167, 21206101, 21303114 and 51572181) and Natural Science Foundation of the Higher Education Institutions of Jiangsu Province, China (15KJB480001).
PY - 2005/10
Y1 - 2005/10
N2 - The ontogenetic development of the gut and accessory organs in large yellow croaker Pseudosciaena crocea was investigated using light microscopy from hatching up to the juvenile stage (40 days post hatch, dph). At 3 dph (mean ± s.d., 4.1 ± 0.1 mm total length, LT), coinciding with the buccopharynx opening, larvae started to feed exogenously, and the gut consisted of a well-developed buccopharynx, a partially-differentiated oesophagus and an intestine divided in three regions (anterior intestine, intermediate intestine and rectum). Yolk reserves were not completely depleted at the onset of exogenous feeding, and a period of mixed nutrition was observed up to 6 dph (4.3 ± 0.1 mm LT), when yolk was definitively exhausted. Important morphological changes occurred at the end of the larval period, coinciding with metamorphosis. At 17 dph (6.8 ± 0.6 mm L T), pyloric caeca differentiated at the junction of the pyloric stomach and the anterior intestine. Gastric glands were first observed at 21 dph (9.2 ± 1.2 mm LT), coinciding with the morphological development of the stomach in three different regions (cardiac, fundic and pyloric) according to the histological characteristics of their mucosa. At this age, large longitudinal folds appeared in the median and posterior oesophageal mucosa. These morphological and histological features suggested the achievement of a digestive system characteristic of large yellow croaker juveniles and adults.
AB - The ontogenetic development of the gut and accessory organs in large yellow croaker Pseudosciaena crocea was investigated using light microscopy from hatching up to the juvenile stage (40 days post hatch, dph). At 3 dph (mean ± s.d., 4.1 ± 0.1 mm total length, LT), coinciding with the buccopharynx opening, larvae started to feed exogenously, and the gut consisted of a well-developed buccopharynx, a partially-differentiated oesophagus and an intestine divided in three regions (anterior intestine, intermediate intestine and rectum). Yolk reserves were not completely depleted at the onset of exogenous feeding, and a period of mixed nutrition was observed up to 6 dph (4.3 ± 0.1 mm LT), when yolk was definitively exhausted. Important morphological changes occurred at the end of the larval period, coinciding with metamorphosis. At 17 dph (6.8 ± 0.6 mm L T), pyloric caeca differentiated at the junction of the pyloric stomach and the anterior intestine. Gastric glands were first observed at 21 dph (9.2 ± 1.2 mm LT), coinciding with the morphological development of the stomach in three different regions (cardiac, fundic and pyloric) according to the histological characteristics of their mucosa. At this age, large longitudinal folds appeared in the median and posterior oesophageal mucosa. These morphological and histological features suggested the achievement of a digestive system characteristic of large yellow croaker juveniles and adults.
KW - Digestive system
KW - Histology
KW - Large yellow croaker
KW - Ontogenetic development
KW - Pseudosciaena crocea
UR - http://www.scopus.com/inward/record.url?scp=33747807489&partnerID=8YFLogxK
U2 - 10.1111/j.0022-1112.2005.00812.x
DO - 10.1111/j.0022-1112.2005.00812.x
M3 - Article
AN - SCOPUS:33747807489
SN - 0022-1112
VL - 67
SP - 1094
EP - 1106
JO - Journal of Fish Biology
JF - Journal of Fish Biology
IS - 4
ER -