An integrative study of larval organogenesis of American shad Alosa sapidissima in histological aspects

作     者：高小强 洪磊 刘志峰 郭正龙 王耀辉 雷霁霖 

作者机构：College of FisheriesOcean University of ChinaQingdao 266003China Key Laboratory for Sustainable Development of Marine FisheriesMinistry of AgricultureQingdao Key Laboratory for Marine Fish Breeding and BiotechnologyYellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdao 266071China Jiangsu Zhongyang GroupNantong 226600China 

出 版 物：《Chinese Journal of Oceanology and Limnology》 (中国海洋湖沼学报（英文版）)

年 卷 期：2016年第34卷第1期

页      面：136-152页

核心收录：

学科分类：0908[农学-水产] 09[农学] 

基　　金：Supported by the National Spark Program of China(No.2012GA690001) 

主　　题：Alosa sapidissima larval development ontogeny histology organ differentiation 

摘      要：We describe organogenesis at a histological level in American shad( Alosa sapidissima) larvae from 0 until 45 days after hatching(DAH). Larval development was divided into four stages based on the feeding mode,external morphological features,and structural changes in the organs: stage 1(0–2 DAH),stage 2(3–5 DAH),stage 3(6–26 DAH) and stage 4(27–45 DAH). At early stage 2(3 DAH),American shad larvae developed the initial digestive and absorptive tissues,including the mouth and anal opening,buccopharyngeal cavity,oesophagus,incipient stomach,anterior and posterior intestine,differentiated hepatocytes,and exocrine pancreas. The digestive and absorptive capacity developed further in stages 2 to 3,at which time the pharyngeal teeth,taste buds,gut mucosa folds,differentiated stomach,and gastric glands could be observed. Four defined compartments were discernible in the heart at 4 DAH. From 3 to 13 DAH,the excretory systems started to develop,accompanied by urinary bladder opening,the appearance and development of primordial pronephros,and the proliferation and convolution of renal tubules. Primordial gills were detected at 2 DAH,the pseudobranch was visible at 6 DAH,and the filaments and lamellae proliferated rapidly during stage 3. The primordial swim bladder was first observed at 2 DAH and started to inflate at 9 DAH; from then on,it expanded constantly. The spleen was first observed at 8 DAH and the thymus was evident at 12 DAH. From stage 4 onwards,most organs essentially manifested an increase in size,number,and complexity of tissue structure.