2- EFFECT OF AD E VITAMINS INJECTION AND DIURNAL VARIATIONS ON 3 PHYSIOLOGICAL RESPONSE AND REPRODUCTIVE ACTIVITY OF GOAT BUCKS EXPOSED TO DIRECT SOLAR RADIATION OF HOT SUMMER SEASON IN EGYPT

This study aimed to investigate the effect of AD E vitamins injection and diurnal variations on physiological 3 function, blood components, libido and semen characteristics in goat bucks exposed to direct solar radiation of hot summer season in Egypt. A number of 30 Damascus goat bucks were used in this research. The animals were exposed to direct solar radiation of hot summer season and divided into three equal groups. The first group was kept without treatment as control while the second and third groups were injected every 15 days with vitamin AD E at the rate of 2 and 4 ml, 3 st respectively. The experiment lasted 3 months (from 1 of July to the end of September, 2014). Temperatures of rectal, skin, hair surface, hair depth, ear and scrotal as physiological measurements in bucks were measured once monthly. Blood sample was collected monthly from the jugular vein of each buck to estimate total protein, albumin, calcium and inorganic phosphorus concentrations and levels of total testosterone, thyroxin (T ) and Triiodothyronine (T ) hormonal levels. Semen 4 3 st nd rd th th th characteristics and semen storage ability after in vitro storage for 1 , 2 , 3 , 4 , 5 and 6 hr periods were estimated monthly.