Benedetti I, Carnevali G
Z Mikrosk Anat Forsch. 1983;97(1):132-40.
The subject of this work is an analysis of the mitotic activity in the developing spinal cord and rhombencephalon of the oviparous teleost Jordanella floridae and the viviparous teleost Gambusia affinis (Cyprinodontoidei). In Gambusia there is considerable and long lasting mitotic activity that decreases gradually and is still present 20 days after birth. In Jordanella the mitotic activity is concentrated in the early stages of development, it then decreases drastically and practically disappears even before hatching and reappears 20 days later. These differences are probably due to the variations in speed and pattern of development in the two teleosts. As regard the localization of mitoses, it emerged that migration towards the lumen may be prevented by physiological conditions related to normal development. It emerged moreover, that migration towards the lumen is not a generalised phenomenon in development of the central nervous system since it is related, in the spinal cord of teleosts at least, to the modality and speed of embryo development.
这项工作的主题是分析卵生硬骨鱼弗罗里达乔丹氏鱼和胎生硬骨鱼食蚊鱼（鲤齿亚目）发育中的脊髓和后脑的有丝分裂活性。在食蚊鱼中，有大量且持久的有丝分裂活性，这种活性会逐渐降低，在出生后20天仍存在。在弗罗里达乔丹氏鱼中，有丝分裂活性集中在发育早期，随后急剧下降，甚至在孵化前就几乎消失，20天后又重新出现。这些差异可能是由于这两种硬骨鱼发育速度和模式的变化。关于有丝分裂的定位，结果表明，向管腔的迁移可能会受到与正常发育相关的生理条件的阻碍。此外，结果还表明，向管腔的迁移在中枢神经系统发育中并非普遍现象，因为至少在硬骨鱼的脊髓中，它与胚胎发育的方式和速度有关。
