摘要
本文对团头鲂骨骼系统的发育进行了研究,观察了刚孵化的仔鱼到已具成鱼特征的幼鱼的骨骼发育过程,对脑颅、咽颅、韦伯氏器和脊椎骨、肩带和胸鳍支鳍骨、腰带和腹鳍支鳍骨以及奇鳍支鳍骨在不同生长阶段的形态特征进行了描述。讨论了韦伯氏器、复合神经骨及第二神经板等的发生过程;并根据团头鲂骨骼发育情况,讨论了头骨各骨片的性质。
The present paper deals with the development of skeletal system of Megalobrama amblycephala, including the development of neurocranium, splanchnocranium, vertebrae, Weberian apparatus and appendicular skeleton. The skeletal development was observed with transparented and stained samples. The morphological characters and process of the skeletal development were described and drawn.The total length is 4.0 mm when the larva has just hatched. The prelarvae stage, from just hatched to yolk sac completely absorbed (4.0--7.0 mm), has a few cartilages. The postlarvae stage, from yolk sac completely absorbed to the occurrence of pterygiophores of ventral fin (7-24 mm), is the important period in skeletal development, for many of the skull and appendicular skeletons are ossified and the vertebrae are completely formed. The juvenile stage, from the ossification of fin rays of ventral fin to the appearance of scales on both sides of the body (24-38 mm), is characterized by most of the skull cartilages being ossified. The young stage, from scales covering the entire body to the period before maturity (above 38 ram), has the skeleton all developed so that the characters of skeletal system is the same as the adult.
Weberian apparatus is formed from the specialization of part of the first three vertebrae.There are five to six interspines found between fourth and' ninth neural spines.According to the different process of skeletal development, each bone can be determined whether it is dermal bone or cartilaginous bone.
出处
《水生生物学报》
CAS
CSCD
北大核心
1989年第1期1-14,共14页
Acta Hydrobiologica Sinica
关键词
团头鲂
骨骼系统
发育
Megalobrama amblycephala, skeltal system, development, skull, larvae and juvenile
