Morphological changes in digestive tract of Atlantic sturgeon Acipenser oxyrinchus during organogenesis

International Aquatic Research

دوره 3، شماره 2، آبان 2011، صفحه 101-105   

نوع مقاله: Original research

نویسندگان

Teresa Ostaszewska^{* 1}؛ Maciej Kamaszewski¹؛ Ryszard Kolman²؛ Grzegorz Wiszniewski²؛ Dobrochna Adamek¹؛ Arkadiusz Duda²

¹Warsaw University of Live Sciences, 02-786 Warszawa, Ciszewskiego 8, Poland

²Inland Fisheries Institute in Olsztyn, 10-719 Olsztyn, Oczapowskiego 10, Poland

چکیده

The histological development of the digestive tract of Atlantic sturgeon Acipenser oxyrinchus larvae were studied from 6^th to 49^th day post hatching (dph). The majority of developmental changes in the Atlantic sturgeon larvae took place during the first days after hatching. In Atlantic sturgeon larvae, digestive tract development started from the spiral intestine and proceeded frontward, similarly as in other sturgeons. During the endogenous feeding phase, the wall of the yolk sac differentiated into the stomach (glandular and non-glandular regions) and the anterior and intermediate intestine, while the hind-gut primordium differentiated into the spiral valve and rectum. At on first exogenous feeding (10 dph), the digestive tract consisted of a well developed buccal cavity, oesophagus, glandular and non glandular stomach, anterior intestine, spiral intestine and anus. The absorptive surface area of the sturgeon intestine increased during development due to the elongation of the intestine and formation of pyloric caeca between 6^th -20^th dph. At the onset of exogenous feeding, the organization and cytoarchitecture of the digestive system in Atlantic sturgeon larvae was generally similar to those of juveniles and adults.

کلیدواژه‌ها

Digestive tract؛ Organogenesis؛ Atlantic sturgeon