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Foster and Kreitzman - Seasons of Life - Sheep

Identifier

020328

Type of Spiritual Experience

Background

A description of the experience

Seasons of Life – Russell G Foster and Leon Kreitzman

If sheep are isolated from changes in environmental photoperiod and artificially maintained under a constant daily 12 hour light and 12 hour dark L:D cycle with no change in day-length, they will still show a circannual cycle in reproduction.  This suggests that although there is a circadian based photoperiod timer there is also a separate circannual timer….

The source of the experience

Foster and Kreitzmann

Concepts, symbols and science items

Symbols

Science Items

Activities and commonsteps

Activities

Commonsteps

References