EFFECTS OF BREEDS OF THE MALE DROMEDARY CAMEL ON SEMEN CHARACTERISTICS, SPERM SURVIVABILITY AND HISTOLOGICAL CHANGES OF THE TESTIS | ||||
| Journal of the Egyptian Veterinary Medical Association | ||||
| Volume 80, Issue 2, December 2020, Page 129-149 PDF (305.75 K) | ||||
| Document Type: Original Research Articles | ||||
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| Abstract | ||||
| Fifteen male dromedary camels at < 6 to 10 years of age (Fellahi, n = 5, Maghrebi, n = 5 and Sudani, n = 5) were used in the present study (Two experiments). Semen samples from each breed were collected using an artificial vagina (AV). Copulation time, semen characteristics, sperm mensuration and histological changes of the camels testes were recorded (The first experiment). In the second experiment, semen was collected and diluted with lactose-yolkcitrate (LYC) extender for each breed and stored at 5ºC for 3 days. In vitro response of spermatozoa and its ability to penetrate cervical mucus in different breeds of she-camel, during incubation at 37ºC for 4 hrs, was recorded. The obtained results showed that copulation time (min), semen-ejaculate volume (ml), sperm motility (%) and sperm-cell concentration (x106/ml) were significantly (P<0.05) higher, however, the percentages of dead spermatozoa, abnormal spermatozoa, acrosome damage of spermatozoa and chromatin damage of spermatozoa were significantly (P<0.05) lower of Fellahi and Maghrebi than Sudani camels. Semen colour was Creamy, Creamy and Thin creamy, while semen consistency was Viscous, Viscous and Semi-viscous of Fellahi, Maghrebi and Sudani camels, respectively. On the other hand, seminal hydrogen-ion concentration (pH) value and sperm mensuration showed insignificantly differences among the studied breeds. With regard to histological changes, seminiferous tubules of the testis were significantly (P<0.05) improved and highly active of Fellahi and Maghrebi breeds than Sudani camels (Experiment 1). The percentages of sperm motility and sperm storagability were significantly (P<0.05) higher, while the percentages of dead spermatozoa, abnormal spermatozoa, acrosome damage and chromatin damage of spermatozoa were significantly (P<0.05) lower in Fellahi and Maghrebi than Sudani camels during storage at 5ºC for 3 days (Experiment 2). The advancement of storage time at 5ºC for 3 days decreased significantly (P<0.05) semen quality in different breeds. The ability of spermatozoa into penetrate cervical mucus showed significantly (P<0.05) better in Fellahi and Maghrebi than Sudani camels spermatozoa, during incubation at 37ºC for 4 hrs. The advancement of incubation times at 37ºC was significantly (P<0.05) decreased the penetrating ability in different breeds into shecamel cervical mucus. In conclusion, copulation time, semen quality, histological changes of the testis and sperm survivability showed better in Fellahi and Maghrebi than Sudani camel spermatozoa. | ||||
| Keywords | ||||
| Dromedary camel; Breeds; Semen characteristics; Testis histology; Penetration | ||||
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