Evaluation of Blood and Seminal Plasma Testosterone and Aldosterone Levels and their Consequences on Semen Parameters and Fertility in Dromedary Camels
Evaluation of Blood and Seminal Plasma Testosterone and Aldosterone Levels and their Consequences on Semen Parameters and Fertility in Dromedary Camels
Moustafa M. Zeitoun 1,3; Mohamed M. Mansour 2,4*
ABSTRACT
Background; Numerous biomarkers had utilized by researchers for predicting fertility in camels or selecting fertile camels. Infertile dromedary camels could be identified with conventional semen quality assessments, but relative in vivo fertility varies significantly for camels considered fertile. Aim; Study the blood and seminal plasma aldosterone and testosterone levels of male dromedary camels and their outcome on semen parameters and fertility. Methods; From breeding history records, depending on fertility status, sixty camels had divided into two groups; control “fertile” (n = 20) and infertile (n = 40). Blood and seminal plasma have obtained from all camels for hormone analysis. Results; Blood testosterone level was lower (p < 0.05) in control “fertile” than that in infertile camels (3.05 ± 0.12 vs. 5.17 ± 0.24 ng/mL). Similarly, lower (p < 0.05) testosterone levels were found in the seminal plasma of control (1.29 ± 0.22 ng/mL) compared to infertile (2.78 ± 0.29 ng/mL) dromedaries. However, there were no differences (p > 0.05) in aldosterone levels between the two groups in the blood or seminal plasma. Blood and seminal plasma aldosterone showed a positive correlation (r = 0.36) in the control group. In infertile camels, there was a positive correlation (r = 0.45) between blood testosterone and aldosterone. Further, there was a negative correlation (r = - 0.26) between blood aldosterone and seminal plasma testosterone. In fertile camels, there was a negative correlation (r = - 0.42) between blood aldosterone and sperm motility percentage. Besides, plasma aldosterone levels in infertile animals were positively correlated (r = 0.26) with sperm abnormality ratios. Conclusion; The blood and seminal plasma aldosterone and testosterone levels could be used as a biomarker to predict fertility in male dromedary camels. Further, it could recommend measuring blood aldosterone relative to seminal plasma testosterone for early diagnosis of sub-fertility in male camels.
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