ABSTRACT
The earth’s environment is not static, since periodic changes with different periodicities occur, driven by geophysical cycles (Fig. 1). The earth’s rotation around its axis imposes daily cycles of light and darkness, while the translation around the Sun provokes annual variations (i.e., seasons). Moreover, the rotation of the moon around the earth causes tidal as well as lunar cycles. Therefore, it should not be surprising that most living organisms have developed a biological clock to keep time and cope with these predictable changes by anticipating the forthcoming of a recurrent event in their habitat. Fish in general, and sea bass in particular, are no exceptions to this rule.
