Abstract
RECENTLY Morris1 has reported on the effect of reversing the photoperiodic seasons on the wool growth of Romney Marsh ewes at Brisbane, Queensland. The timing of the annual rhythm changed gradually until after two years it became reversed. In our own laboratories we have made similar experiments, which gave results somewhat different from those of Morris.
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References
Morris, L. R., Nature, 190, 102 (1961).
Bennett, J. W., Hutchinson, J. C. D., and Wodzicka-Tomaszewska, Manika, Nature, 194, 651 (1962).
Hart, D. S., J. Agric. Sci., 56, 235 (1961).
Ferguson, K. A., Carter, H. B., and Hardy, Margaret H., Austral. J. Sci. Res., B, 2, 42 (1949).
Wildman, A. B., Bull. Wool. Indust. Res. Assoc., 24, 38 (1962).
Symington, R. B., Nature, 184, 1076 (1959).
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HART, D., BENNETT, J., HUTCHINSON, J. et al. Reversed Photoperiodic Seasons and Wool Growth. Nature 198, 310–311 (1963). https://doi.org/10.1038/198310a0
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DOI: https://doi.org/10.1038/198310a0
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