赤石斑鱼胚胎、胚后发育及仔稚幼鱼形态发育变化观察

Observation on the embryonic and post embryonic development, as well as morphological changes of larvae, juvenile and young fish of Epinephelus fasciatus

中文关键词: 赤石斑鱼  胚胎发育  仔稚幼鱼  形态发育

英文关键词: Epinephelus fasciatus  Embryonic development  Larva, juvenile and young fish  Morphological development

中文摘要:

      赤石斑鱼(Epinephelus fasciatus)属于小型石斑鱼类,具有肉质鲜美、市场价值高等特点。本研究利用收集的野生亲本,首次在我国北方工厂化条件下实现赤石斑鱼人工繁育,并对其胚胎和胚后发育、幼鱼培育开展了系统研究。在水温23.4±0.8℃,盐度28~30‰条件下,受精卵经31h12min完成胚胎发育。胚后发育时序分为前期仔鱼(0~3dph)、后期仔鱼(4~29dph)、稚鱼期(30~54dph)和幼鱼期(55dph以后)。饵料投喂中：3~9dph投喂S型轮虫；9~20dph投喂L型轮虫；20~30dph投喂卤虫幼体；培育至31dph时,开始由动物型饵料转为配合饲料。与早期发育阶段相比,转饵后的鱼苗在生长、表型、鳞片以及体色方面的发育速度均出现快速增长,说明其在转饵过程中对配合饲料的接受度较高。通过开展胚胎发育及仔稚幼鱼的形态发育研究,为赤石斑鱼工厂化繁育及规模化养殖提供了科学依据。

英文摘要:

      Epinephelus fasciatus, a small grouper, is characterized by its delicious meat and high market value. This study utilized collected wild parents of red grouper to conduct artificial breeding, embryonic and post embryonic development, and juvenile fish cultivation research under industrialized conditions in northern China. At present, there are no reports on the artificial breeding, embryonic and post embryonic development, and feed conversion process of E. fasciatus under local factory conditions in China. This study focuses on the fertilized eggs and juvenile fish of E. fasciatus artificially bred in factories, and observes and records their embryonic development and abnormal growth. The relationship between juvenile fish development and feed conversion is studied, providing scientific reference for the industrial breeding and aquaculture of E. fasciatus, as well as high-value utilization.