Abstract
IN 1921 Uvarov1 enunciated the phase theory to account for the swarming of locusts, a theory which postulated post-embryonic divergences in the pigmentation, structure and behaviour of members of the same species. This theory has since been proved by field observations and by experiment to be correct in a number of locust species, and in breeding experiments the changes were found to be due to the density of population of locusts2.
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References
Bull. Entom. Res., 12, 135–163 (1921).
Faure, Bull. Entom. Res., 23, 293–405 (1932).
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KENNEDY, J. Phase Transformation in Locusts in the Field. Nature 140, 889–890 (1937). https://doi.org/10.1038/140889b0
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DOI: https://doi.org/10.1038/140889b0
