Morphology And Density Distribution Of Cone Photoreceptor In The Retina Of The Atlantic Stingray, Dasyatis-Sabina

    Authors

    F. T. Logiudice;R. J. Laird

    Comments

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    Abbreviated Journal Title

    J. Morphol.

    Keywords

    Reef Teleosts; Topography; Streaks; Areae; Anatomy & Morphology

    Abstract

    Light miscroscopy of the retina in the Atlantic stingray, Dasyatis sabina, reveal two distinct photoreceptor types. Histological criteria establish the two cell types as morphological rods and cones. The retina was studied through a sequential series of vertical sections in a protocol designed to evaluate the entire retina. By performing differential counts in multiple regions and expressing cones as a percent of the total photoreceptors in a domain, it was possible to determine relative cone density and distribution. Cone distribution varies throughout the retina in two patterns. First, relative cone density gradually decreases peripherally. Second, a cone-rich band occurs along the horizontal axis of the eye, extending from ora serrata to ora serrata. This structure appears to be a visual streak. Both distribution patterns are statistically significant and are consistent among animals regardless of age. (C) 1994 Wiley-Liss, Inc.

    Journal Title

    Journal of Morphology

    Volume

    221

    Issue/Number

    3

    Publication Date

    1-1-1994

    Document Type

    Article

    Language

    English

    First Page

    277

    Last Page

    289

    WOS Identifier

    WOS:A1994PD93900003

    ISSN

    0362-2525

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