Related Experiment Videos
Retinal morphology of cyprinid fishes: a quantitative histological study of ontogenetic changes and interspecific
M Zaunreiter1, H Junger, K Kotrschal
1Zoologisches Institut, Universität Salzburg, Austria.
Abstract:
Morphological patterns of the retina, cone size and density, rod density, rod-cone ratio, ganglion cell density, convergence of receptor cells, resolving power (RP) and regionalization were examined throughout life history in roach and in adults of asp, bream, common carp, roach and sabre carp. The retina of hatchlings is packed with small cones. During larval and juvenile growth the retina stretches, cones increase in diameter and rods are present in increasing numbers. Photopic and scotopic sensitivity as well as resolving power increase. Comparison of adults shows distinct interspecific differences in retinal parameters, which can be related to life style.