The role of photoperiodism in the seasonal breeding of tropical African ungulates
Article first published online: 10 APR 2008
Volume 3, Issue 3, pages 71–83, September 1973
How to Cite
SPINAGE, C. A. (1973), The role of photoperiodism in the seasonal breeding of tropical African ungulates. Mammal Review, 3: 71–83. doi: 10.1111/j.1365-2907.1973.tb00174.x
- Issue published online: 10 APR 2008
- Article first published online: 10 APR 2008
Records of ungulate calving peaks, from different latitudes within the African tropics, are reviewed. Converting these peaks to conception dates, and plotting them against latitude, reveals whether the initiation of conception may be connected with a photoperiodic response. The north-south plots of a short-day species should lie in diagonally-opposed quadrants, and those of long-day species in the opposite quadrants. The analysis suggests that a photoperiodic stimulus could be a factor initiating conception in some species, but others lack any apparent relationship.