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- W3024996212 abstract "THAT light is a factor of prime importance in the inauguration or stimulation of bird migration, has been suggested by many authors from the days of Seebohm onwards. While many of the suggestions will not bear close investigation, at least one very attractive view has been put forward by Sir E. Sharpey-Schafer. In an address delivered some years ago to the Scottish Natural History Society1 he makes the following comments, “the regularity with which migration occurs, indicates that the exciting cause must be regular. There is no yearly change, outside the equatorial zone, that occurs so regularly in point of time as the change in the duration of daylight. On this ground this may well be considered a determining factor in migration, and it has the advantage over other suggested factors that it applies to the northerly as well as to the southerly movement.” He says further “That it [migration] is a result of developmental changes in the sexual organs is improbable.”" @default.
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- W3024996212 date "1974-01-01" @default.
- W3024996212 modified "2023-09-23" @default.
- W3024996212 title "RELATION OF LIGHT TO BIRD MIGRATION AND DEVELOPMENTAL CHANGES" @default.
- W3024996212 doi "https://doi.org/10.1016/b978-0-12-550150-7.50008-4" @default.
- W3024996212 hasPublicationYear "1974" @default.
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