Development of fish embryonic stem cell lines as tools for basic and applied studies of interest in aquaculture
type: CreativeWork
description: Living organisms are constantly exposed to cyclical variations, whether daily, monthly or yearly, in environmental factors such as light and temperature. These external fluctuations are the result of terrestrial rotational and translational movements generated by the earth's spinning on its own axis and around the sun. Daily and seasonal variations in light duration (photocycles) affect all living organisms and give rise to a multitude of physiological and behavioural adaptations of a rhythmic nature that favour their survival. With the exception of some organisms that live in the deep ocean or in caves, these cyclical variations of light affect all living beings, making biological rhythms strongly rooted and phylogenetically conserved in most organisms from unicellular to mammals. Therefore, the study of biological rhythms and all their components (synchronising factors or input, molecular clock, rhythmic manifestations or output) is essential to understand the mechanisms of synchronisation, internal time measurement, response and anticipation to predictable environmental variations in living organisms, with circadian rhythms (with a period of around 24 h) being the ones that have aroused most interest in recent decades. As indicated above, light is one of the most studied synchronising environmental factors, determining many of the rhythmic physiological responses observed at the tissue and cellular level. However, light has effects related not only to its time-varying component (photoperiod), but also to variations in intensity and spectral quality. This is particularly important in marine aquatic environments where the water column acts as a colour filter, resulting in non-uniform light penetration as a function of depth and water characteristics (e.g., turbidity). This differential penetration of the electromagnetic wavelengths of visible light in the ocean, and its variation with depth, results in blue and green light having greater penetration of the water co…
abstract: Living organisms are constantly exposed to cyclical variations, whether daily, monthly or yearly, in environmental factors such as light and temperature. These external fluctuations are the result of terrestrial rotational and translational movements generated by the earth's spinning on its own axis and around the sun. Daily and seasonal variations in light duration (photocycles) affect all living organisms and give rise to a multitude of physiological and behavioural adaptations of a rhythmic nature that favour their survival. With the exception of some organisms that live in the deep ocean or in caves, these cyclical variations of light affect all living beings, making biological rhythms strongly rooted and phylogenetically conserved in most organisms from unicellular to mammals. Therefore, the study of biological rhythms and all their components (synchronising factors or input, molecular clock, rhythmic manifestations or output) is essential to understand the mechanisms of synchronisation, internal time measurement, response and anticipation to predictable environmental variations in living organisms, with circadian rhythms (with a period of around 24 h) being the ones that have aroused most interest in recent decades. As indicated above, light is one of the most studied synchronising environmental factors, determining many of the rhythmic physiological responses observed at the tissue and cellular level. However, light has effects related not only to its time-varying component (photoperiod), but also to variations in intensity and spectral quality. This is particularly important in marine aquatic environments where the water column acts as a colour filter, resulting in non-uniform light penetration as a function of depth and water characteristics (e.g., turbidity). This differential penetration of the electromagnetic wavelengths of visible light in the ocean, and its variation with depth, results in blue and green light having greater penetration of the water co…
author: Vergés Castillo, Alba
language: eng
license: http://creativecommons.org/licenses/by-nc-nd/4.0/
date published: 2025-04-09
date modified: 2026-07-24T01:29:24Z
provider: Universidad de Cadiz
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Universidad de Cadiz

PropertyValue
property ID: Handle
value: http://hdl.handle.net/10498/37160