Summary
The retinal projections in 2-year-old salmon smolt (Oncorhynchus nerka) are significantly different from those observed in other teleosts examined to date in that the projections are more extensive. Very noticeable are extensive projections to most of the dorsal thalamus, to all layers of the optic tectum, and into the periaqueductal gray of the torus semicircularis. The salmon smolt has bilateral retinal projections to the diencephalon and pretectum. A small retinal projection to the lateral habenular nucleus has not been described previously. Although these findings suggest striking differences in retinal projections among teleosts, this variation may relate to age differences since the previously studied teleosts were adults.
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References
Bazer GT, Ebbesson SOE (1984) A simplified cobalt-lysine method for tracing axon trajectories in the central nervous system of vertebrates. Neurosci Lett 51:315–318
Ebbesson SOE (1972) A proposal for a common nomenclature for some optic nuclei in vertebrates and the evidence for common origin to two such cell groups. Brain Behav Evol 6:75–91
Ebbesson SOE (1980) The parcellation theory and its relation to interspecific variability in brain organization, evolutionary and ontogenetic development and neuronal plasticity. Cell Tissue Res 213:179–212
Ebbesson SOE (1981) Interspecific variability in brain organization and its possible relation to evolutionary mechanisms. In: Laming P (ed) Brain Mechanisms of Behavior in Lower Vertebrates. Cambridge University Press, Cambridge, pp 59–76
Ebbesson SOE (1984) Evolution and ontogeny of neural circuits. Behav Brain Sci 7:321–366
Ebbesson SOE, Ito H (1980) Bilateral retinal projections in the black piranha (Serrasalmus niger). Cell Tissue Res 213:483–495
Ebbesson SOE, Smith JE, Bazer GT, Bailey RP, Reynolds JB (1985) Alterations of neurotransmitters with aging in coho salmon (Oncorhynchus kisutch Walbaum). Proc Soc Neurosci 11:728
Ebbesson SOE, Bazer GT, Bailey RP, Reynolds JB, Smith JE (1987) Changes with age in total brain content of biogenic amine and amino acid neurotransmitters in coho salmon (Oncorhynchus kisutch Walbaum). Brain Res 405:175–177
Gallyas F (1979) Light insensitive physical developers. Stain Technol 54:173–176
Lazar G (1978) Application of cobalt-filling technique to show retinal projections in the frog. Neuroscience 3:725–736
Pinganaud G, Clairambault P (1979) The visual system of the trout Salmo irideus Gibb. A degeneration and autoradiographic study. J Hirnforsch 20:413–431
Springer AD, Prokosch JH (1982) Surgical and intensification procedures for defining visual pathways with cobaltous-lysine. J Histochem Cytochem 30:1235–1242
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Ebbesson, S.O.E., Bazer, G.T., Reynolds, J.B. et al. Retinal projections in sockeye salmon smolts (Oncorhynchus nerka). Cell Tissue Res. 252, 215–218 (1988). https://doi.org/10.1007/BF00213845
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DOI: https://doi.org/10.1007/BF00213845