SCANNING ELECTRON-MICROSCOPY OF 4 TELEOSTEAN RETINAS

  • 1 January 1976
    • journal article
    • research article
    • Vol. 35  (4) , 199-210
Abstract
The morphology of the retinas of the goldeye Hiodon alosoides (Hiodontidae), the brook trout Salvelinus fontinalis (Salmonidae), the yellow perch Perca flavescens and the walleye Stizostedion vitreum (Percidae) was studied by SEM [scanning electron microscopy]. Semithin plastic sections of the same retinas were also examined for comparison. Contrary to earlier observations, the goldeye retina possessed both rods and cones; in the other 3 fishes'' retinas, present observations correspond to previous ones, adding only details. SEM gave an impressive, 3 dimensional view of the gross surface features of the retinas. Shrinkage during the processing of the specimens for SEM, while not altering the general topography, did induce artifacts in both plexiform layers.