title: Glossary of avian photoperiodic terminology and methods of expressing lighting regimens.
abstract: 1. A list of definitions is given for terms commonly used in animal photoperiodism. 2. A list of symbols and abbreviations commonly used in avian photoperiodism is included. 3. Methods are given for a standardised description of lighting regimens.
authors: Department of Animal Husbandry, University of Bristol, School of Veterinary Science, Langford, England.
authors: P D
authors: PD
authors: Lewis
authors: G C
authors: GC
authors: Perry
mesh_terms: D000818:Animals; D001717:Birds / Q000502:physiology*; D008027:Light; D010507:Periodicity; D009626:Terminology as Topic