ZFIN ID: ZDB-PUB-961014-123
The development of photoreceptors in the zebrafish, Brachydanio rerio. I. Structure
Branchek, T. and BreMiller, R.
Date: 1984
Source: The Journal of comparative neurology   224: 107-115 (Journal)
Registered Authors: BreMiller, Ruth
Keywords: none
MeSH Terms:
  • Animals
  • Cell Differentiation*
  • Fishes/anatomy & histology*
  • Microscopy, Electron
  • Photoreceptor Cells/cytology*
  • Retina/cytology
  • Rod Cell Outer Segment/cytology
  • Synapses/ultrastructure
PubMed: 6715574 Full text @ J. Comp. Neurol.
Morphological development of photoreceptors in the central retina of the zebrafish, Brachydanio rerio, was studied by using light and electron microscopic techniques. Outer segments (OS) first appeared at 2.5 days postfertilization (d2.5). On d3, synaptic elaborations were seen. By d8, two OS types were present and were identified as cones. The first indication of rod formation was also evidenced at this time, when vitreally positioned nuclei were observed and rodlike cells were infrequently detected in electron micrographs. At d12, the full complement of zebrafish photoreceptors, rods and four cone types, was identified. From this time on cells grew until adult dimensions were reached at d24. These structural observations are consistent with results of functional studies which utilized physiological and behavioral techniques.