Circadian rhythmicity and the initiation of gonadal growth in sparrows

Fred W. Turek

doi:10.1007/BF00696526

Circadian rhythmicity and the initiation of gonadal growth in sparrows

Fred W. Turek^*

^*Corresponding author for this work

Neurobiology

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

White-crowned and golden-crowned sparrows were held under a variety of light cycles in which a main 8-hour light period was combined with dark periods of varying durations. Gonadal growth was not observed in birds under cycles of 24-(8L:16D), 48-(8L:40D) or 72-hours (8L:64D). Growth was initiated in sparrows under cycles of 36-(8L:28D) and 60-hours (8L:52D). These results are consistent with the hypothesis that circadian rhythmicity is involved in photoperiodic time measurement during the initiation of gonadal growth in birds.

Original language	English (US)
Pages (from-to)	59-64
Number of pages	6
Journal	Journal of Comparative Physiology
Volume	92
Issue number	1
DOIs	https://doi.org/10.1007/BF00696526
State	Published - Mar 1 1974

ASJC Scopus subject areas

Ecology, Evolution, Behavior and Systematics
Physiology
Animal Science and Zoology
Behavioral Neuroscience

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10.1007/BF00696526

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Circadian rhythmicity and the initiation of gonadal growth in sparrows

Abstract

ASJC Scopus subject areas

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