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"Photoperiod" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure, which enables searching at various levels of specificity.

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The time period of daily exposure that an organism receives from daylight or artificial light. It is believed that photoperiodic responses may affect the control of energy balance and thermoregulation.

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This graph shows the total number of publications written about "Photoperiod" by people in this website by year, and whether "Photoperiod" was a major or minor topic of these publications.
Bar chart showing 26 publications over 19 distinct years, with a maximum of 2 publications in 1999 and 2004 and 2005 and 2008 and 2009 and 2014 and 2016
To see the data from this visualization as text, click here.