The pineal gland and the photoperiodic control of luteinizing hormone secretion in intact and castrated Japanese quail

S. M. Simpson, H. F. Urbanski, J. E. Robinson

    Research output: Contribution to journalArticle

    26 Scopus citations


    The effects of pinealectomy on a range of photoperiodic responses were investigated in male Japanese quail by measuring plasma LH concentrations in intact, sham-operated and pinealectomized birds in the following four experiments: 91) transfer of sexually quiescent birds from a short photoperiod of 8 h light:16 h darkness (8L:16D) to a photostimulatory daylength of 16L:8D; (2) transfer of sexually mature birds frin 16L:8D to 8L:16D; (3) castration in 16L:8D and exposure to 13L:11D; (4) castration in 8L:16D and exposure to 13L:11D. There was no evidence of effects of the pineal gland on the photoperiodically induced changes in LH secretion, the quantitative relationship between LH secretion and photoperiod in intact and castrated birds, or the induction of relative photorefractoriness by prolonged exposure to 16L:8D. This suggests that there is no pineal influence on the photoperiodic clock or its effectors in this bird.

    Original languageEnglish (US)
    Pages (from-to)281-287
    Number of pages7
    JournalJournal of Endocrinology
    Issue number2
    StatePublished - Jan 1 1983


    ASJC Scopus subject areas

    • Endocrinology, Diabetes and Metabolism
    • Endocrinology

    Cite this