【摘要】 通过干法授精获得乌原鲤受精卵,对其胚胎发育全过程进行连续观察。结果显示,乌原鲤成熟卵子呈圆球形、亮黄色、具黏性,卵径1.68~1.98mm,吸水膨胀后卵径2.28~2.57mm。水温(20±1)℃时,受精卵至出膜时长为80.8h,积温1616.0℃·h。乌原鲤胚胎发育与其他鱼类胚胎发育过程相似,历经受精卵、卵裂、囊胚、原肠胚、神经胚、器官形成至出膜6阶段,各发育阶段所需积温分别为44.4、136.0、127.0、130.2、55.0、1123.4℃·h。出膜阶段历时47.45h,初孵仔鱼自尾部破膜孵出,全长约6.10mm,体高1.60mm。温度对乌原鲤胚胎发育及出膜阶段影响明显,水温(20±1)℃比水温(15±1)℃胚胎仔鱼出膜时间更早、出膜更同步、出膜时段更集中。更多还原

【Abstract】 The embryonic development was observed in fertilized eggs of Chinese ink carp Procypris merus by dry artificial fertilization under a microscope.It was found that Chinese ink carp had spherical,yellow and adhesive eggs with diameter of 1.68—1.98 mm,which were changed to 2.28—2.57 mm in diameter due to water absorption.It took 80.8 hthat the fertilized eggs were hatched from fertilization with an accumulative temperatures of 1616.0 ℃·h at water temperature of(20±1)℃.Like other fishes,the embryonic development of Chinese ink carp were divided into 6 stages:fertilized egg,cleavage,blastula,gastrula,neurula and organogenesis,with accumulative temperatures of 44.4,136.0,127.0,130.2,55.0 and 1123.4 ℃·h,respectively.The fertilized eggs were hatched first from tail in 47 h27 min,and the newly hatched larvae had mean total length of 6.10 mm and body height of 1.60 mm.The embryonic development and the hatching of Chinese ink carp were affected by water temperature,the earlier hatching and more synchronous and aggregation at water temperature of(20±1)℃than at(15±1)℃.更多还原