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Author Takemura, A.; Ueda, S.; Hiyakawa, N.; Nikaido, Y.
Title A direct influence of moonlight intensity on changes in melatonin production by cultured pineal glands of the golden rabbitfish, Siganus guttatus Type Journal Article
Year 2006 Publication Journal of Pineal Research Abbreviated Journal J Pineal Res
Volume 40 Issue (down) 3 Pages 236-241
Keywords Animals; Circadian Rhythm; *Light; Melatonin/biosynthesis/*secretion; *Moon; Organ Culture Techniques; Perciformes/*physiology; Pineal Gland/physiology/*radiation effects
Abstract Rabbitfish are a restricted lunar-synchronized spawner that spawns around a species-specific lunar phase. It is not known how the fish perceive changes in cues from the moon. One possible explanation is that rabbitfish utilize changes in moonlight intensity to establish synchrony. The purpose of the present study was to examine whether or not the pineal gland of the golden rabbitfish can directly perceive changes in moonlight intensity. Isolated pineal glands were statically cultured under natural or artificial light conditions and melatonin secreted into the culture medium was measured using a time-resolved fluoroimmunoassay. Under an artificial light/dark cycle, melatonin secretion significantly increased during the dark phase. Under continuous light conditions, melatonin secretion was suppressed, while culture under continuous dark conditions seemed to duplicate melatonin secretion corresponding to the light/dark cycle in which the fish were acclimated. When cultured pineal glands were kept under natural light conditions on the dates of the full and the new moon, small amounts of melatonin were secreted at night. Moreover, exposure of cultured pineal glands to artificial and natural light conditions resulted in a significant decrease of melatonin secretion within 2 hr. These results suggest that the isolated pineal gland of golden rabbitfish responds to environmental light cycles and that 'brightness' of the night moon has an influence on melatonin secretion from the isolated pineal gland.
Address Sesoko Station, Tropical Biosphere Research Center, University of the Ryukyus, Motobu, Okinawa, Japan. tilapia@lab.u-ryukyu.ac.jp
Corporate Author Thesis
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Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0742-3098 ISBN Medium
Area Expedition Conference
Notes PMID:16499560 Approved no
Call Number IDA @ john @ Serial 70
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Author Srinivasan, V.; Smits, M.; Spence, W.; Lowe, A.D.; Kayumov, L.; Pandi-Perumal, S.R.; Parry, B.; Cardinali, D.P.
Title Melatonin in mood disorders Type Journal Article
Year 2006 Publication The World Journal of Biological Psychiatry : the Official Journal of the World Federation of Societies of Biological Psychiatry Abbreviated Journal World J Biol Psychiatry
Volume 7 Issue (down) 3 Pages 138-151
Keywords Human Health; Antidepressive Agents/therapeutic use; Biological Markers/blood; Bipolar Disorder/diagnosis/drug therapy/*physiopathology; Circadian Rhythm/drug effects/physiology; Depressive Disorder/diagnosis/drug therapy/*physiopathology; Depressive Disorder, Major/diagnosis/drug therapy/physiopathology; Humans; Melatonin/*blood/therapeutic use; Phototherapy; Seasonal Affective Disorder/diagnosis/physiopathology; Sleep Disorders, Circadian Rhythm/diagnosis/drug therapy/physiopathology; Treatment Outcome
Abstract The cyclic nature of depressive illness, the diurnal variations in its symptomatology and the existence of disturbed sleep-wake and core body temperature rhythms, all suggest that dysfunction of the circadian time keeping system may underlie the pathophysiology of depression. As a rhythm-regulating factor, the study of melatonin in various depressive illnesses has gained attention. Melatonin can be both a 'state marker' and a 'trait marker' of mood disorders. Measurement of melatonin either in saliva or plasma, or of its main metabolite 6-sulfatoxymelatonin in urine, have documented significant alterations in melatonin secretion in depressive patients during the acute phase of illness. Not only the levels but also the timing of melatonin secretion is altered in bipolar affective disorder and in patients with seasonal affective disorder (SAD). A phase delay of melatonin secretion takes place in SAD, as well as changes in the onset, duration and offset of melatonin secretion. Bright light treatment, that suppresses melatonin production, is effective in treating bipolar affective disorder and SAD, winter type. This review discusses the role of melatonin in the pathophysiology of bipolar disorder and SAD.
Address Department of Physiology, School of Medical Sciences, University Sains Malaysia, Kubang Kerian, Kota Bharu, Kelantan
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Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1562-2975 ISBN Medium
Area Expedition Conference
Notes PMID:16861139 Approved no
Call Number LoNNe @ kagoburian @ Serial 816
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Author Li, Q.F.; Yang, G.X.; Yu, L.H.; Zhang, H.
Title A survey of the luminance distribution in the nocturnal environment in Shanghai urban areas and the control of luminance of floodlit buildings Type Journal Article
Year 2006 Publication Lighting Research & Technology Abbreviated Journal Lighting Research & Technology
Volume 38 Issue (down) 3 Pages 185-189
Keywords Lighting
Abstract A survey of the luminance distribution of the nocturnal environment in Shanghai urban areas, which included 11 locations and 16 buildings, was made. The 11 locations could be categorized as commercial, administration, leisure or residential. The average environmental luminance of these was recorded. The authors identified the effects of excessive exterior lighting. The luminance was measured and subjective appraisals made of 16 buildings. The writers have developed an empirical formula for arriving at the brightness level rating for floodlit buildings and recommended corresponding working ranges of luminance.
Address
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1477-1535 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 2715
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Author Sella, K.N.; Salmon, M.; Witherington, B.E.
Title Filtered Streetlights Attract Hatchling Marine Turtles Type Journal Article
Year 2006 Publication Chelonian Conservation and Biology Abbreviated Journal Chelonian Conservation and Biology
Volume 5 Issue (down) 2 Pages 255-261
Keywords Reptilia; Testudines; Cheloniidae; Loggerhead turtle; turtles; marine turtles; reptiles; Caretta caretta; Chelonia mydas; hatchlings; artificial lighting; light “trapping”; orientation; seafinding; Florida
Abstract On many nesting beaches, hatchling marine turtles are exposed to poled street lighting that disrupts their ability to crawl to the sea. Experiments were done to determine how hatchlings responded to street lighting transmitted through 2 filters that excluded the most disruptive wavelengths (those <&#8201;530 nm; those <&#8201;570 nm). Filtered lighting, however, also attracted the turtles though not as strongly as an unfiltered (high-pressure sodium vapor) lighting. Filtering is therefore of limited utility for light management, especially since other alternatives (such as lowering, shielding, or turning off unnecessary lighting; use of dimmer lights embedded in roadways) are more effective.
Address
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Series Volume Series Issue Edition
ISSN 1071-8443 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ john @ Serial 78
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Author Petrželková, K. J.; Downs, N. C.; Zukal, J.; Racey, P. A.
Title A comparison between emergence and return activity in pipistrelle bats Pipistrellus pipistrellus and P. pygmaeus Type Journal Article
Year 2006 Publication Acta Chiropterologica Abbreviated Journal
Volume 8 Issue (down) 2 Pages 381-390
Keywords animals; fying mammals: animal behaviour
Abstract Bats may be vulnerable to predation during evening emergence and morning return to their roosts. Early emergence increases the risk of exposure to raptorial birds, but emerging late confers a risk of missing the dusk peak of aerial insects. Here, both emergence and return activity was studied in detail at the same roosts for the first time. We investigated six maternity colonies of pipistrelle bats (Pipistrellus pipistrellus and P. pygmaeus) in NE Scotland and recorded light levels and time of emergence and return of the bats with respect to sunset and sunrise on the same nights. Parameters of return activity generally occurred at lower light intensities than those of emergence. Therefore, the interval between dawn return and sunrise was generally longer than that between sunset and dusk emergence. Emergence and return were equal in duration. Bats clustered more on emergence in comparison with return during pregnancy and lactation, whereas during postlactation this trend was reversed.
Address
Corporate Author Thesis
Publisher BioOne Place of Publication Editor
Language English Summary Language English Original Title
Series Editor Series Title Abbreviated Series Title
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ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number LoNNe @ schroer @ Serial 1598
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