Histomorphogenesis on hindbrain in Huso huso (Beluga sturgeon) larvae
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This study has been done on evolution and morphology of hindbrain structure, during larvae life from 1 to 54 dph on Huso huso. It was concentrated on significant cerebellum and medulla oblongata. The cerebellum occupied the rostral part of dorsal wall of fourth ventricle. The fourth ventricle was visible on 1 day old and by aging was majorly. The fourth ventricle lied on the caudally and continued into central canal (cc) in spinal cord. Cortex of cerebellum had three layers, which were visible from 6 days old. Granular layer of corpus cerebelli, eminentia granularis, and less valvula cerebelli contained Golgi type II, and purkinje cells and observed from 6 days old clearly. Three sulci recognized in cerebellum on 15 days old. Medulla oblongata located at the caudal part of cerebellum and observed from 1 day old and contained eminentia granulares and crista cerebellares. Nucleuses of facial and vagal nerves were in ventral thick part of medulla oblongata. This structure, similar to cerebellum had columns of columnar cells in its gray matter. The white and gray matter, in hindbrain was visible on 1 and 3 days old, and from 6 days old the rate of white matter increased. Stereological results showed that there were significantly distinctive regional differences in the volume of different parts of hindbrain represented a correlation and was P < 0.05. Generally, in H. huso larvae from 1 to 54 days old, the volume of hindbrain had a significant increased such that it had the largest volume in fish brain compare to other parts.
KeywordsHindbrain H. Huso Evolution Volume
Thanks to Dr. Tavighi for practical assistance and labor on the thesis, Dr. Shojaei for embryology information, and Dr. Behnam Rassouli for stereological technique.
All authors contributed equally to this work and are responsible for the data presented herein.
The study was supported by the Faculty of Veterinary Science Ferdowsi University of Mashhad, Iran, (Grant number455).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of Interest.
The study protocol was approved by the Animal Care and Use Committee, Faculty of Veterinary Science, Ferdowsi University, Iran (Animal Use Protocol No.140).
Human and animal rights
This article does not contain any studies with human participants performed by any of the authors.
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