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Seasonal changes in sexual activity and semen quality in the Angora ram.

1. Libido and male hormone concentrations

P.G. Loubser, C.H. van Niekerk and L.J.J. Botha

Department of Human and Animal Physiology, University of Stellenbosch


The seasonal changes in libido and peripheral venous plasma concentrations of testosterone and luteinizing hormone of the Angora ram were investigated. A definite breeding season from March to the end of July was determined. Libido, as well as the levels of testosterone and luteinizing hormone followed a seasonal pattern with a change in photoperiod being the main stimulus for the seasonal sexual variations.

S. Afr. J. Anim. Sci. 1983, 13: 131 - 133



South African journal Animal Science 13 (2)