Abstract
IT has recently been shown by Marshall and Bowden1 that not only duration but also intensity of illumination can affect the onset of a breeding season, and that ultra-violet as well as visible light is effective. These discoveries have an important bearing on seasonal phenomena in the tropics.
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References
Marshall, F. H. A., and Bowden, F. P., J. Exp. Biol., 13, 383 (1936).
Chavarria, A. P., and Gomezvega, P., Amer. J. Hyg., 20, 508 (1934).
Baker, J. R., and Harrisson, T. H., J. Linn. Soc. (Zool.), 39, 433 (1936).
Wait, W. E., ” Manual of the Birds of Ceylon” (London: Dulau, 1931).
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BAKER, J. Light and Breeding Seasons. Nature 139, 414 (1937). https://doi.org/10.1038/139414a0
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DOI: https://doi.org/10.1038/139414a0
