鲻早期发育阶段鳃的超微结构及其呼吸表面积的研究

应用扫描电镜技术对人工繁育鲻（Mugil cephalus）早期发育阶段10、15、23、36、40和44日龄的仔、稚、幼鱼鳃结构作了观察,同时计测其呼吸表面积,探讨幼体体质量、体长与呼吸表面积之间的相关关系。结果显示,随着日龄增长,仔、稚、幼鱼的鳃结构和功能逐渐完善,鳃丝总数随仔、稚、幼鱼全长和体质量的增加分别呈幂指数式和对数式增加;单位长度鳃小片数与体质量之比值随体质量的增长呈幂指数式增加;体质量与总呼吸面积之间的变化关系以及体质量与单个鳃小片面积之间的变化关系可分别用二次项关系式表达。研究结果表明,鲻鳃的发育和分化是与仔、稚、幼鱼的生长、形态发育及生理功能的完善同步。

Study on gill ultrastructure and respiratory area in early developmetal stages of grey mullet（Mugil cephalus）

We observed the gill ultrastructure in early developmental stages of larval,juvenile and young grey mullets（Mugil cephalus）at 10th ,15th ,23rd ,36th ,40th and 44th day after hatching by scanning electron microscopy. The respiratory area was estimated, and the relationship was studied among body weight,body length and respiratory area. Results show that the gill ultrastructure and function gradually improved in larval,juvenile and young M. cepalus as growing. The total number of gill filaments increased with in-creasing body length and body weight in power series and logarithmic series. The ratio of secondary filaments per millimeter to body weight increased with increasing body weight in power series. Relationship between body weight and total respiratory area as well as that between body weight and single secondary filament area could be expressed by quadratic equation. In conclusion,development and dif-ferentiation of gill were in accordance with growth,development and perfection of physiological function in larval,juvenile and young M. cepalus.