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Titolo:
Day-night variations in plasma melatonin and arginine vasotocin concentrations in chronically cannulated flounder (Platichthys flesus)
Autore:
Kulczykowska, E; Warne, JM; Balment, RJ;
Indirizzi:
Polish Acad Sci, Marine Biol Ctr, PL-81347 Gdynia, Poland Polish Acad SciGdynia Poland PL-81347 Biol Ctr, PL-81347 Gdynia, Poland Univ Manchester, Sch Biol Sci, Manchester M13 9PT, Lancs, England Univ Manchester Manchester Lancs England M13 9PT M13 9PT, Lancs, England
Titolo Testata:
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR AND INTEGRATIVE PHYSIOLOGY
fascicolo: 4, volume: 130, anno: 2001,
pagine: 827 - 834
SICI:
1095-6433(200111)130:4<827:DVIPMA>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
TROUT ONCORHYNCHUS-MYKISS; RAINBOW-TROUT; PINEAL ORGAN; CARASSIUS-AURATUS; ATLANTIC SALMON; IN-VITRO; PHOTOPERIOD; VASOPRESSIN; INVITRO; SECRETION;
Keywords:
arginine vasotocin; day-night rhythm; fish; flounder; hormone; melatonin; neurohormone; pineal; platichthys flesus; teleost;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Kulczykowska, E Polish Acad Sci, Marine Biol Ctr, Sw Wojciecha 5 St, PL-81347 Gdynia, Poland Polish Acad Sci Sw Wojciecha 5 St Gdynia Poland PL-81347
Citazione:
E. Kulczykowska et al., "Day-night variations in plasma melatonin and arginine vasotocin concentrations in chronically cannulated flounder (Platichthys flesus)", COMP BIOC A, 130(4), 2001, pp. 827-834

Abstract

Chronically catheterised, free swimming flounder (Platichthys flesus) havebeen used in experiments examining the day-night variations in circulatinglevels of melatonin (Mel) and arginine vasotocin (AVT). Under normal photoperiod (16 h light/8 h dark) serial blood samples taken from individual fish demonstrated a Mel rhythm with daytime levels at 09.00 and 15.00 h (238 +/- 14 and 179 +/- 12 fmol (.) ml(-1), respectively) lower than those at 23.00 h (1920 +/- 128 fmol (.) ml(-1)). Maintenance of fish in 24-h light abolished the light/dark Mel rhythm and circulating levels were comparable to those measured during the day in fish under normal photoperiod illumination. In fish maintained under 24 h dark, although a daily rhythm was still apparent, at the time when it would be normally dark, plasma Mel concentration was reduced and at times when it would be normally light, levels were higher than in fish maintained under normal light/dark illumination. Plasma AVT concentrations were higher in fish during the day (4.4 +/- 0.8 fmol (.) ml(-1)) than those at night (1.5 +/- 0.4 fmol (.) ml(-1)), the opposite to that seen with Met. During acute study infusion of AVT resulted in reduced levels of plasma Mel, although this did not achieve statistical significance. Infusion of Mel did not alter circulating AVT concentration. (C) 2001 Elsevier Science Inc. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 12:16:36