三疣梭子蟹胚胎发育过程中卵内幼体形态  

MORPHOLOGY OF EGG-LARVAE OF SWIMMING CRAB(PORTUNUS TRITUBERCULATUS) DURING EMBRYONIC DEVELOPMENT

作　　者：薛俊增[1] 堵南山[2] 赖伟[2] 

机构地区：[1]杭州师范学院生物系,杭州310036 [2]华东师范大学生物系,上海200062

出　　处：《动物学报》2001年第4期447-452,共6页ACTA ZOOLOGICA SINICA

基　　金：国家自然科学基金资助项目 (No .39370 0 89)&&

摘　　要：三疣梭子蟹胚胎发育过程中 ,卵内幼体共经历 2期卵内无节幼体和 3期卵内状幼体。各幼体期的主要特征表现为 :第 1期卵内无节幼体具小触角、大触角和大颚 3对附肢 ,第 2期卵内无节幼体除第 1期的 3对附肢外 ,2对小颚开始出现 ,腹部前端分节 ;第 1期卵内状幼体阶段复眼先为棒状 ,继而变成月牙状 ,附肢 5对 ,腹部分为 6节 ,第 2期卵内状幼体阶段 2对颚足出现 ,复眼发育完全 ,卵黄蝶状 ,心脏开始跳动 ,到此阶段末期 ,附肢分节和分叉 ,第 3期卵内状幼体阶段 ,各器官进一步发育 ,肌肉明显。Scholars have their own views for egg-larval stages of crustacean. We studied the embryonic development in order to explain the accurate stages for the Swimming crab (Portunus trituberculutus) by histological method. The egg-nauplius stages and egg-zoea stages were discovered in the embryonic development of the crab. The egg-nauplius stages were divided into egg\|naupliusⅠand egg-naupliusⅡ. The optic disc rudiment, antenule rudiment, antennna rudiment and mandible rudiment increased and formed optic lobe, antenule, antenna and mandible with the cleaving cells during the egg-nauplius Ⅰ. These appendages were unsegmented. The thoracoabdominal process formed abdomen with the proliferating cells. The labrum rudiment and labium rudiment formed in the tip of the stomodeum. The maxillule, maxilla, cavity abdomen, optic ganglia and antennule ganglia formed during the egg-nauplius Ⅱ. The segmentation emerged between the abdomen and thorax. The egg-zoea stages were divided into egg-zoea Ⅰ, egg-zoea Ⅱ and egg-zoea Ⅲ. The carapace, stomach, hint gut, compound eye and thoracic ganglia formed in the egg-zoea Ⅰ. The antenna ganglia keep in touch with each other. Each of the optic ganglia was independent. The abdomen was divided into 6 segments. The appendages segmented during the egg-zoea Ⅱ. The ends of the appendages were divergent with setae. The parts of the compound eyes have formed. The shape of the yolk sac was like butterfly. The pigment cells, maxillipede Ⅰ, maxillipede Ⅱ, heart, gonad and brain have formed. The mesoderm formed muscle and arranged themselves as beads in the next stage. The digestive system has formed except hepatopancreas. Compared with the egg-zoeaⅠ and egg-zoea Ⅱ, the brain and carapace further developed in the egg-zoea Ⅲ. The muscle and the hepatopancreas formed at the same time. Different crustaceans have their respective egg-larva. Some crustaceans have only egg-nauplius; some have egg-nauplius and egg-zoea larvae, while others have their egg-macrophthal larva besides

关 键 词：三疣梭子蟹 胚胎发育 卵内幼体 

分 类 号：Q954.4[生物学—动物学]