تأثير الاختلافات الموسمية في السلوك الجنسي للكباش العواسية و الحمدانية

الملخص EN

This study was condected to evaluate the seasonal effects on sexual behavior and correlation with testosterone level in Awassi and Hamadani rams.

Eight rams ( 4 Awassi and 4 Hamadani rams, 4 years old ) were used in the study .

The rams were subjected seasonally for sexual behavior test and blood samples collections.

Result revealed that the best sexual behavior characters were recorded at Autumn as represented by the significant reduction in the mounting trails ( 1.83 ) and time for 1st mount ( 16.46 seconds ) compared with other seasons, also the improvement in values of the time for 1st jump, time for 1st serving , number of jumps for 1st serving and number of serving, this improvement in sexual behavior characters may be due to the significant increase in testosterone level at autumn (7.08ng/ ml).

In regard to the breed the result showed that Awassi rams were generally better than Hamadani rams in all of the sexual behavior characters, and also it was correlated with the increase in testosterone level in Awassi rams (7.10 ng / ml).

In conclusion the best sexual behavior characters were recorded at autumn then at spring seasons, and in Awassi than Hamadani rams.