Effects of Photoperiod, Pinealectomy and Ophthalmectomy on Circulating Melatonin Rhythms in the Goldfish, Carassius auratus(Endocrinology)
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概要
- 論文の詳細を見る
Effects of photoperiod, pinealectomy and ophthalmectomy on circulating melatonin rhythms were studied in the goldfish, Carassius auratus. Under light-dark (LD) 16:8 or LD 8:16 photoperiod, plasma melatonin levels exhibited diurnal rhythms with high liters during the scotophase and low liters during the photophase. When the fish were Iransferred from LD 12:12 to continuous dark conditions, plasma melatonin levels exhibited circadian changes during the first 3 days under continuous dark-ness (DD). The rhylhms, however, became indistrincl during days 7-8 and 14-15. When Ihe fish were Iransferred lo conlinuous lighl condilions, plasma melalonin remained at low levels. Pinealectomy abolished high melatonin levels in the plasma at mid-dark, but ophthalmeclomy did not. These results clearly indicale that circulating melatonin levels are pholoperiod-dependent and shows circadian rhythms under DD condilions, and lhal Ihe plasma melatonin rhythm is mainly generated by the pineal gland.
- 1992-10-15
著者
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IIGO Masayuki
Department of Applied Biochemical Science, Faculty of Agriculture, Utsunomiya University
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FURUKAWA Kiyoshi
Department of Aquatic Biosciences, Graduate School of Agricultural and Life Sciences, The University
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Aida Katsumi
Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University
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Iigo M
Department Of Applied Biochemistry Faculty Of Agriculture Utsunomiya University
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Ichikawa M
Mie Univ. Mie Jpn
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Iigo Masayuki
Department Of Applied Biochemistry Faculty Of Agriculture Utsunomiya University
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Iigo Masayuki
Department Of Anatomy St. Marianna University School Of Medicine
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Aida Katsumi
Department Of Aquatic Bioscience Graduate School Of Agricultural And Life Sciences The University Of
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Hirata K
Department Of Anatomy St. Marianna University School Of Medicine
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Hirata Kazuaki
Department Of Anatomy St. Marianna University School Of Medicine
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Hanyu Isao
Department of Fisheries, Faculty of Agriculture The University of Tokyo
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Hanyu I
Univ. Tokyo Tokyo Jpn
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Hanyu Isao
Department Of Fisheries Faculty Of Agriculture The University Of Tokyo
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KEZUKA HIROAKI
Department of Fisheries, Faculty of Agriculture, The University of Tokyo
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Furukawa Kiyoshi
Department Of Aquatic Bioscience Graduate School Of Agricultural And Life Sciences The University Of
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Furukawa K
Department Of Aquatic Bioscience Graduate School Of Agricultural And Life Sciences The University Of
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Kezuka H
Laboratory Of Aquatic Animal Physiology Department Of Aquatic Bioscience Graduate School Of Agricult
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Ichikawa M
Department Of Applied Biochemistry Utsunomiya University
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Aida K
Department Of Fisheries Faculty Of Agriculture The University Of Tokyo
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Kezuka Hiroaki
Department of Anatomy, St. Marianna University School of Medicine
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