Carr, R. K., 1995a. - Biological Sciences
Carr, R. K., 1995a. - Biological Sciences
Carr, R. K., 1995a. - Biological Sciences
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fishes (WALLS, 1942; NICOL, 1989). Associated with this increase in both relative and absolute<br />
sizes is a concordant change in pupil size (NICOL, 1989). Since the intensity of light varies as<br />
the square of the distance traveled, an increase in eye diameter would require an enlargement<br />
of the aperture to maintain image intensity on the retina. This relationship is found within both<br />
elasmobranchs and osteichthyans (NICOL, 1989) suggesting a common, although independently<br />
derived (GRUBER & COHEN, 1978), pattern among gnathostomes.<br />
Within aspinothoracids, large eyes developed independently several times (Figs. 15B, 16A).<br />
This independence is supported, in part, by differences in the head shiel