Search engine for discovering works of Art, research articles, and books related to Art and Culture
Javascript must be enabled to continue!
Effects of season, temperature, and photoperiod on plasma melatonin rhythms in the goldfish, Carassius auratus
View through CrossRef
Abstract: Effects of season, environmental temperature, and photoperiod on plasma melatonin concentrations were studied in the goldfish, Carassius auratus. When goldfish were reared under natural conditions, melatonin levels at mid‐dark exhibited seasonal changes, with higher levels obtained in June and September than in December and March. When fish were kept under light: dark (LD) cycle of 12: 12 at 5, 15, or 25°C during March‐April, temperature‐dependent increases in melatonin levels at mid‐dark were observed. When animals were maintained under LD 16: 8 or LD 8: 16 in combination with temperature changes (5, 15, and 25°C) during January‐February, the duration of nocturnal elevation in melatonin was controlled by the length of the scotophase while the amplitude was influenced by environmental temperature. These results indicate that plasma melatonin profiles in the goldfish exhibit seasonal changes that are regulated by both photoperiod and temperature.
Title: Effects of season, temperature, and photoperiod on plasma melatonin rhythms in the goldfish, Carassius auratus
Description:
Abstract: Effects of season, environmental temperature, and photoperiod on plasma melatonin concentrations were studied in the goldfish, Carassius auratus.
When goldfish were reared under natural conditions, melatonin levels at mid‐dark exhibited seasonal changes, with higher levels obtained in June and September than in December and March.
When fish were kept under light: dark (LD) cycle of 12: 12 at 5, 15, or 25°C during March‐April, temperature‐dependent increases in melatonin levels at mid‐dark were observed.
When animals were maintained under LD 16: 8 or LD 8: 16 in combination with temperature changes (5, 15, and 25°C) during January‐February, the duration of nocturnal elevation in melatonin was controlled by the length of the scotophase while the amplitude was influenced by environmental temperature.
These results indicate that plasma melatonin profiles in the goldfish exhibit seasonal changes that are regulated by both photoperiod and temperature.
Related Results
Photoperiod and Melatonin Supplementation: Variable Effects on the Quality of Chilled Dog Semen
Photoperiod and Melatonin Supplementation: Variable Effects on the Quality of Chilled Dog Semen
The addition of melatonin in seminal extenders due to its antioxidant properties and its beneficial role in sperm preservation has been previously described, especially in seasonal...
Competing influences of mental stress and melatonin on skin temperature regulation
Competing influences of mental stress and melatonin on skin temperature regulation
Introduction: In preparation for sleep, endogenous melatonin release increases distal skin temperature due to elevated skin blood flow, which contributes to reductions in core body...
Melatonin Biosynthesis, Receptors, and the Microbiota–Tryptophan–Melatonin Axis: A Shared Dysbiosis Signature Across Cardiac Arrhythmias, Epilepsy, Malignant Proliferation, and Cognitive Trajectories
Melatonin Biosynthesis, Receptors, and the Microbiota–Tryptophan–Melatonin Axis: A Shared Dysbiosis Signature Across Cardiac Arrhythmias, Epilepsy, Malignant Proliferation, and Cognitive Trajectories
Melatonin, an indolic neuromodulator with putative oncostatic and proposed anti-inflammatory properties, primarily demonstrated in preclinical models, is produced at extrapineal si...
Effect of thyroxine and rGH hormone recombinant on growth and survival goldfish larvae, Carassius auratus (Linnaeus, 1758)
Effect of thyroxine and rGH hormone recombinant on growth and survival goldfish larvae, Carassius auratus (Linnaeus, 1758)
Slow growth is obstacles to achieving the target of goldfish production (Carassius auratus auratus). The process of metabolism and growth in fish is influenced by hormonal factors....
Effects of Melatonin Supplementation on Cardiovascular Reactivity to Acute Psychosocial Stress
Effects of Melatonin Supplementation on Cardiovascular Reactivity to Acute Psychosocial Stress
Introduction: Elevated blood pressure responses to acute mental stress are associated with cardiovascular risk. Prior studies demonstrate that melatonin supplementation reduces sym...
Melatonin and mammary cancer: a short review.
Melatonin and mammary cancer: a short review.
Melatonin is an indolic hormone produced mainly by the pineal gland. The former hypothesis of its possible role in mammary cancer development was based on the evidence that melaton...
Melatonin Administration to Blind People: Phase Advances and Entrainment
Melatonin Administration to Blind People: Phase Advances and Entrainment
The purpose of this study was to test the phase-shifting and entraining effects of melatonin in human subjects. Five totally blind men were found in a previous study to have free-r...
Ocular Melatonin Rhythms in Teleost Fish
Ocular Melatonin Rhythms in Teleost Fish
Melatonin (<i>N</i>-acetyl-5-methoxytryptamine) is synthesized in the pineal organ and the retina of vertebrates. In some teleost species, ocular melatonin levels can e...