Extraretinal light perception in the sparrow. 3. The eyes do not participate in photoperiodic photoreception.

Abstract

Photoperiodic control of testis growth in Passer domesticus (house sparrow) is mediated entirely by extraretinal photoreceptors in the brain. The eyes do not participate in photoperiodically significant photoreception. Removal of the pineal organ does not affect either the response to light or, to a first approximation, the process of recrudescence. The… (More)

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