肉质扁脑珊瑚的有性繁殖及早期发育

Sexual reproduction and early development of Platygyra carnosus

在实验室养殖的条件下对肉质扁脑珊瑚Platygyra carnosus的有性繁殖进行初步观察,收集其排放的精卵进行受精,同时记录了肉质扁脑珊瑚早期发育各个时期的形态特征。观察结果表明,肉质扁脑珊瑚为雌雄同体,体外受精,在月圆后第9天开始出现排卵现象,第11天排卵量达到最大。肉质扁脑珊瑚的卵为粉红色圆球形。在水温27?0.5℃的条件下,肉质扁脑珊瑚早期发育共经历5个发育阶段17个时期,受精卵经48h发育为浮浪幼虫,96h以后开始寻找基底进行附着。本研究为国内首次记录和报道肉质扁脑珊瑚的有性繁殖及胚胎发育过程,可以为石珊瑚的生态修复积累理论依据。

Sexual reproduction of Platygyra carnosus was observed preliminarily under the condition of artificial culture.Eggs and sperms of Platygyra carnosus were collected when they were spawned.The morphological characteristics in early development of Platygyra carnosus during different periods were recorded and described.The results showed that the corals were hermaphrodites,in vitro fertilization,and began spawning on the ninth day after the full moon,,then the spawning quantity of corals increased to the maximum on the11th day after the full moon.The eggs of Platygyra carnosus were spherical in shape and pink in color.The early development process underwent five phases and17stages under the conditions of27?0.5℃.The fertilized eggs developed into planula in48h and the larvae began to settle after96h.The sexual reproduction and early development of Platygyra carnosus were reported for the first time in China.