Continuous light and melatonin: Daily and seasonal variations of brain binding sites and plasma concentration during the first reproductive cycle of sea bass

► LL, applied from early stages, disrupted plasma melatonin daily variations. ► Under NP, binding in optic tectum varied daily while in hypothalamus variedseasonally. ► Under LL, melatonin binding variations persisted in hypothalamus at the 4reproductive stages.