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Internal timing mechanism - Coggle Diagram
Internal timing mechanism
Advantages
SYNCH WITH ENVIRONMENT
Seeking
Avoiding Predators
Reproducing
Mataboplism
Time you migrate
Hibernation
Maximise feeding time without predators
Biological Rhythm
Diurnal
Day
Crepuscular
Dawn/Dusk
Noctrurnal
Night
Timing
Endogenous (Internally Driven)
Circadian
Circannual
Circatidal
Circalunar
Exogenous (Externally Driven)
Zietgeber (time giver)
External Cue
Environmental cue which resets the rhythm. This entrains the internal clock to be reset.
Benefits of entrainment
Animals can adjust to environmental changes
Longer days in Summer
Shorter days in Winter
Migration
Better seasons
Better day lengths
Free Running
Unaffected by external cues.
When kept in a constant environment (for experiment) the individual will still practise a rhythm of periods with awake/asleep