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Journal of Experimental Biology 51,635-641 (1969)
Published by Company of Biologists 1969

The Visual Mechanisms of Tenebrio Molitor: Variations Taking Place in the Erg of Pupa and Adult During Development

URI YINON ¹ and EDGAR AUERBACH ²

¹ The Vision Research Laboratory, Hadassah University Hospital, Jerusalem, Israel, Department of Ophthalmology, Duke University Medical Center, Durham, N.C., U.S.A.
² The Vision Research Laboratory, Hadassah University Hospital, Jerusalem, Israel

1. The changes in the ERG of the compound eye of Tenebrio molitor were measured and followed in both the pupal and the adult stages.

2. In the pupal stage the generally monophasic ERG was found to appear on the second day, and within 7 days reached an amplitude of 0.35 mV. The more complex ERG of the adult beetle increased in amplitude to more than mV. during the following 14 days.

3. The latent periods and peak latencies of the pupal and adult ERGs differed only slightly and did not display any consistent changes with age.

4 The morphological development of the eye was compared with the changes in the ERG.