Biological Clock in Fish

Biological Clock in Fish

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Each organism has its own internal biological clock, which is reset by environmental cues (Zeitgebers), thus keeping it synchronized with the external environment. It is a chemically based oscillating system within cells, relying on molecular feedback loops. Circadian biological clocks exist in most organisms. What is so special about the clock in fish? Where is it locateda€”in the retina, inside the brain, or in the pineal? What is the molecular basis of its function? How is the clock able to keep time in the absence of environmental cues? Although biological clocks have been intensively studied over the past four decades, only recently have the tools needed to examine the molecular basis of circadian rhythms become available. This book reviews the state of knowledge in sufficient detail and presents the latest contributions to the field, showing fish provide a unique model of the circadian biological clock.The results obtained add to our knowledge of the role of the pineal gland in fish, because the effect of temperature changes on secretory ... This clock is synchronized directly by the photoperiod, where light has an inhibiting effect on melatonin production. ... Therefore, the pineal gland in fish can function as a transmitter of both heat and light information needed to regulatea€”through rhythmic melatoninanbsp;...

Title:Biological Clock in Fish
Author:Ewa Kulczykowska, Wlodzimierz Popek, B.G. Kapoor
Publisher:CRC Press - 2010-05-27


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