Diurnal variation in plasma luteinising hormone levels in the domestic fowl (Gallus domesticus) |
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| Authors: | C G Scanes A Chadwick P J Sharp N J Bolton |
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| Affiliation: | 1. Department of Animal Physiology and Nutrition, University of Leeds, Leeds LS2 9JT, United Kingdom;2. Department of Pure and Applied Zoology, University of Leeds, Leeds LS2 9JT, United Kingdom;3. ARC Poultry Research Centre, Edinburgh EH9 3JS, United Kingdom |
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| Abstract: | Variations in the concentration of luteinising hormone (LH) in the blood were measured over 24 hr in sexually immature chickens maintained on long daily photoperiods of 18L:6D, 16L:8D, or 14L:10D. A significant increase in the concentration of LH occurred shortly after the onset of the dark period in both sexes. The possible significance of this observation in relation to neural control of the ovulatory cycle is discussed. |
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| Keywords: | To whom all correspondence should be addressed. |
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