Correlation Between Embryonic Nutrition And Morphorgenesis Of Macrobrachium Rosenbergii

The freshwater prawn, Macrobrachium rosenbergii belong to Arthropoda, Crustacea. It is one of the most economical prawns in China in recent years, and is considered to be one of the most valuable prawn resources in the world. Wide range of distribution and high economical importance make highly attractive to aquaculture and, consequently, studies were focused on this species by scholars all over the world. So far, numerous of researches were carried on in Macrobrachium rosenbergii, on the field of the morphology, population ecology, idioplasmic genetics, biochemistry, physiology and toxicology, etc. Nowadays, lots of knowledge was acquired on this species. However, in the field of developmental biology, little is known about embryo's nutritional metabolism, embryo's nutritional metabolism in relation to morphogenesis of this species. The present paper, studies on morphorgenesis in relation to embryonic nutrition metabolism of Macrobrachium rosenbergii were carried on. Methods and technology nowadays were employed to study on morphorgenesis in relation to embryonic nutrition metabolism of Macrobrachium rosenbergii. The data obtained would provide valuable information to a better understanding of crustacean embryonic development and it is helpful to breeding practice of Macrobrachium rosenbergii. Results of present paper are concluded as follow:1 Mechanism of embryo attachment in the Freshwater Prawn,Macrobrachium rosenbergiiThe structural features of embryo attachment systems of the freshwater prawn, Macrobrachium rosenbergii were investigated by scanning electron microscopy and histological methods. The results showed that lots of mucus secreted by pleopod mucus gland were distributed on protopod and endopod. Ovigerous setae were hollow and thick. The surface of setae was full of microvillus. These structures of setae were adapted to embryo attachment. The primary egg membrane and the secondary egg membrane existed in embryos. From fertilized egg stage to zoea stage, embryos were...