草鱼脑的发育和结构

DEVELOPMENT AND STRUCTURE OF THE BRAIN OF THE GRASS CARP CTENOPHARYNGODON IDELLUS(C.V.)

  • 摘要: 对刚孵化至全长500毫米草鱼脑的发育过程中的形态变化和脑在颅腔中的位置变动作了详细观察;对发育完善脑的结构进行了研究,并叙述了副脑上腺、脑上脑、脑垂体和血管囊的形态和位置变化.全长7.4毫米端脑前端分化出嗅球,全长53.4毫米嗅球开始与大脑分离,真正的嗅神经位于嗅囊和嗅球之间一些细而短的神经.全长125毫米以后脑的发育已基本趋于完善,形态构造亦基本稳定;全长227毫米以后脑已位于颅腔后部.

     

    Abstract: This paper describes the development and characteristics changes in the brain of grass carp and the position changes of the brain in the cranial cavity from hatching to 500 mm total length(TL). The general structure of the well-developed brain has been described in detail. The characteristics tend to stability when the brain becomes well-development after 125mm TL. The brain contacts the cranial cavity tightly and the only space is ahead of the telencephalon before 50 mm TL. The position of the brain gradually moves to the posterior part of the cavity. The brain is on the latter half of the cranial cavity after 227 mm TL. The morphology and the position changes of the paraphysis, epiphysis, hypophysis and the vascular sac have also been described.

     

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