Melatonin is an evolutionarily conserved molecule that serves a time-keeping function in
various species. In vertebrates, melatonin is produced predominantly by the pineal gland …

Seasonality is an important adaptive trait in temperate fish species as it entrains or regulates
most physiological events such as reproductive cycle, growth profile, locomotor activity and …

Fish have evolved a biological clock to cope with environmental cycles, so they display
circadian rhythms in most physiological functions including stress response. Photoperiodic …

The environment which living organisms inhabit is not constant and many factors, such as
light, temperature, and food availability, display cyclic and predictable variations. To adapt to …

Gonadotropin-inhibitory hormone (GnIH) is a hypothalamic neuropeptide that belongs to the
RFamide peptide family and was first identified in the quail brain. From the discovery of …

The circadian system is responsible for the temporal organisation of physiological functions
which, in part, involves daily cycles of hormonal activity. In this review, we analyse the …

Part of the life cycle of several fish species includes important salinity changes, as is the
case for the sea bass (Dicentrarchus labrax) or the Atlantic salmon (Salmo salar). Salmo …

Circadian rhythmicity in behaviour and metabolism is a ubiquitous phenomenon in biology,
documented in such diverse species as unicellular organisms, plants, invertebrates, and …

Photoperiod is perceived by pineal photoreceptors and transduced into rhythmic melatonin
signals. These rhythms can be influenced by light intensity and spectral content. In this study …

Melatonin is a key hormone involved in the photoperiodic signaling pathway. In both teleosts
and mammals, melatonin produced in the pineal gland at night is released into the blood …