| 11. | The timing of migration seems to be controlled primarily by changes in day length.
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| 12. | Short day length promotes asparagine formation, whereas glutamine is produced under long day regimes.
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| 13. | Artificial light can be used to extend day length.
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| 14. | The irregular day lengths mean that fractional Julian days do not work properly with UTC.
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| 15. | However, photoperiod only predicts overwintering in areas where day length effects the maturation of milkweeds.
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| 16. | Different snails respond to day length in different ways.
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| 17. | Day length variations with latitude can also impact breeding.
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| 18. | Because day length changes through the seasons, every animal has to reset its clocks every day.
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| 19. | :: Tango, I'm not sure I follow you on day length in a tidally locked system.
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| 20. | This main event also lasts 4 days as opposed to the Fall event's 3 day length.
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