Journal ArticleDOI
A comparative ex vivo and in vivo study of day and night perception in teleosts species using the melatonin rhythm.
Herve Migaud,John Taylor,Geir Lasse Taranger,Andrew Davie,José Miguel Cerdá-Reverter,Manuel Carrillo,Thomas Willum Hansen,Niall Bromage +7 more
Reads0
Chats0
TLDR
The pineal gland in isolation thus appeared to have different sensitivities as the whole animal, suggesting that retinal and/or deep brain photoreception may contribute, in vivo, to the control of melatonin production.Abstract:
The purpose of this study was to determine and compare the light sensitivity of two commercially important, phylogenetically different teleost species in terms of melatonin production. Three series of experiments were performed on both Atlantic salmon and European sea bass. First, a range of light intensities were tested ex vivo on pineal melatonin production in culture during the dark phase. Then, light transmission through the skull was investigated, and finally short-term in vivo light sensitivity trials were performed. Results showed that sea bass pineal gland ex vivo are at least 10 times more sensitive to light than that of the salmon. Light intensity threshold in sea bass appeared to be between 3.8 × 10 -5 and 3.8 × 10 -6 W/m 2 in contrast to 3.8 × 10 -4 and 3.8 x 10 -5 W/m 2 in salmon. These highlighted species-specific light sensitivities of pineal melatonin production that are likely to be the result of adaptation to particular photic niches. Light transmission results showed that a significantly higher percentage of light penetrates the sea bass pineal window relative to salmon, and confirmed that penetration is directly related to wavelength with higher penetration towards the red end of the visible spectrum. Although results obtained in vivo were comparable, large differences between ex vivo and in vivo were observed in both species. The pineal gland in isolation thus appeared to have different sensitivities as the whole animal, suggesting that retinal and/or deep brain photoreception may contribute, in vivo, to the control of melatonin production.read more
Citations
More filters
Journal ArticleDOI
Current knowledge on the melatonin system in teleost fish
TL;DR: How manipulation of the photic cues impact on fish circannual clock and annual cycle of reproduction, and how this can be used for aquaculture purposes is discussed.
Journal ArticleDOI
Current knowledge on the photoneuroendocrine regulation of reproduction in temperate fish species
TL;DR: This review aims to bring together the current knowledge on the photic control of reproduction mainly focusing on seasonal temperate fish species and shape the current working hypotheses supported by recent findings obtained in teleosts or based on knowledge gathered in mammalian and avian species.
Journal ArticleDOI
Effects of light during early larval development of some aquacultured teleosts a review
Natalia Villamizar,Borja Blanco-Vives,Herve Migaud,Andrew Davie,Stefano Carboni,Francisco Javier Sánchez-Vázquez +5 more
TL;DR: The role of lighting conditions during the early development of fish larvae is highlighted and should be taken into account for the optimization of rearing protocols in fish hatcheries as juvenile supply is one of the main production bottlenecks.
Journal ArticleDOI
Effect of light spectrum and photoperiod on the growth, development and survival of European sea bass (Dicentrarchus labrax) larvae
TL;DR: This study investigates how the characteristics (spectrum and photoperiod) of artificial light affect European sea bass eggs and larvae from − 1 to 40 days post-hatching.
Journal ArticleDOI
The effect of spectral composition and light intensity on melatonin, stress and retinal damage in post-smolt Atlantic salmon, Salmo salar
TL;DR: Results demonstrated that salmon perceived blue LED light (basal melatonin levels maintained) irrespective of intensity, demonstrating the efficiency of the adaptive mechanisms to light developed in fish.
References
More filters
Journal ArticleDOI
The environmental regulation of maturation in farmed finfish with special reference to the role of photoperiod and melatonin
Journal ArticleDOI
Generation of the Melatonin Endocrine Message in Mammals: A Review of the Complex Regulation of Melatonin Synthesis by Norepinephrine, Peptides, and Other Pineal Transmitters
TL;DR: The aim of this review is to gather together early and recent data on the effects of the nonadrenergic transmitters on modulation of melatonin synthesis, which reveals the variety of inputs that can be integrated by the pineal gland; what elements are crucial to deliver the very precise timing information to the organism.
Journal ArticleDOI
Cellular circadian clocks in the pineal.
TL;DR: This review focuses on the functional properties of the cellular circadian clocks of non-mammalian vertebrates and how functions the clock?
Journal ArticleDOI
The pineal organ of teleost fishes
Peter Ekstrzm,Hilmar Meissl +1 more
TL;DR: There are strong indications that the pineal organ is one component in a central neural system that constitutes the photoperiod-responding system of the animal, i.e. the system that is responsible for correct timing of daily and seasonal physiological rhythms.
Book
Rhythms of Life: The Biological Clocks that Control the Daily Lives of Every Living Thing
Russell G. Foster,Leon Kreitzman +1 more
TL;DR: Our biological clocks are reset at sunrise and sunset each day to link astronomical time with an organism's internal time as mentioned in this paper, and they impose a structure that enables us to change our behaviour in relation to the time of day, month or year.