Seasonal Changes in Certain Seminal Attributes
of Friesian Bulls in Iraq

A. S. AL-JANABI1, B. M. ABDUL-LATIF2, K. I AL-BADRY3 and F. F. IBRAHIM4

1 Department of Physiology and Pharmacology, College of Veterinary Medicine, Baghdad University, Iraq
2 Department of Histology and Anatomy, College of Veterinary Medicine, Baghdad University, Iraq
3 Department of Surgery and Obstetrics, College of Veterinary Medicine, Baghdad University, Iraq
4 Artificial Insemination Centre, Ministry of Agriculture, Baghdad, Iraq

Abstract

AL-JANABI, A. S., B. M. ABDUL-LATIF, K. I AL-BADRY and F. F. IBRAHIM, 1999. Seasonal changes in certain seminal attributes of Friesian bulls in Iraq, Bulg. J. Agric. Sci., 5: 797-800

A total of 803 ejaculates were collected from 16 Friesian bulls (6 imported and 10 born in Iraq) over one year period. Parameters studied included: Ejaculate volume (EV), mass activity (MA), number of ejaculates collected from each bull (NE) that are suitable for freezing. Collected semen was diluted and number of straws prepared from each bull was calculated. Results showed that EV and number of straws prepared were significantly (P<0.05) higher in imported as compared to those born in Iraq. All bulls showed a significant (P<0.05) increase in number of prepared straws in winter as compared to other seasons. No such difference was traced in other parameters, although NE was markedly higher in autumn than other seasons. These results may indicate that Friesian bulls exhibit better reproductive abilities, when they were reared in cooler environment than that prevelant in Iraq during hot summer.

Key words: Friesian bulls; semen; season; temperature; straws