Critical Flicker Frequency in a Harp Seal: Evidence for Duplex Retinal Organization

Authors

Charles D. Bernholz, University of Nebraska-LincolnFollow
Michael L. Matthews, University of Guelph, Ontario, Canada

Document Type

Article

Date of this Version

June 1975

Comments

Published in Vision Research 15:6 (June 1975), pp. 733–736. Copyright © 1975 Pergamon Press/Elsevier. Used by permission. http://www.sciencedirect.com/science/journal/00426989

Abstract

Critical flicker frequency (CFF) was investigated in a free swimming harp seal using behavioral techniques. The resulting CFF vs intensity curve indicates a definite rod/cone break, suggesting a duplex photoreceptor population, whose presence had not been observed in previous morphological reports.