RESPONSIVENESS OF ANGLO-NUBIAN AND DAMASCUS DOES TO CIDR-eCG PROTOCOL DURING OUT OF BREEDING SEASON
Ramadan, T., Elmokadem, M., Nour El-Din, A., Rashad, A. (2022). RESPONSIVENESS OF ANGLO-NUBIAN AND DAMASCUS DOES TO CIDR-eCG PROTOCOL DURING OUT OF BREEDING SEASON. EKB Journal Management System, 59(2), 53-60. doi: 10.21608/ejap.2022.127322.1038
Tamer Awad Ramadan; Marwan Elmokadem; Adel Nour El-Din; Amr Rashad. "RESPONSIVENESS OF ANGLO-NUBIAN AND DAMASCUS DOES TO CIDR-eCG PROTOCOL DURING OUT OF BREEDING SEASON". EKB Journal Management System, 59, 2, 2022, 53-60. doi: 10.21608/ejap.2022.127322.1038
Ramadan, T., Elmokadem, M., Nour El-Din, A., Rashad, A. (2022). 'RESPONSIVENESS OF ANGLO-NUBIAN AND DAMASCUS DOES TO CIDR-eCG PROTOCOL DURING OUT OF BREEDING SEASON', EKB Journal Management System, 59(2), pp. 53-60. doi: 10.21608/ejap.2022.127322.1038
Ramadan, T., Elmokadem, M., Nour El-Din, A., Rashad, A. RESPONSIVENESS OF ANGLO-NUBIAN AND DAMASCUS DOES TO CIDR-eCG PROTOCOL DURING OUT OF BREEDING SEASON. EKB Journal Management System, 2022; 59(2): 53-60. doi: 10.21608/ejap.2022.127322.1038

RESPONSIVENESS OF ANGLO-NUBIAN AND DAMASCUS DOES TO CIDR-eCG PROTOCOL DURING OUT OF BREEDING SEASON

Egyptian Journal of Animal Production
Article 2, Volume 59, Issue 2, June 2022, Page 53-60  XML PDF (910.84 K)
Document Type: Original Article
DOI: 10.21608/ejap.2022.127322.1038
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Authors
Tamer Awad Ramadan email orcid 1; Marwan Elmokademorcid 1; Adel Nour El-Dinorcid 2; Amr Rashadorcid 2
1Animal Production Research Institute, Agricultural Research Center, 4 Nadi El-Said, 12311 Dokki, Giza, Egypt
2Animal Production Department, Faculty of Agriculture (El-Shatby), Alexandria University, Alexandria 22545, Egypt
Abstract
       The current study was conducted to assess the efficiency of controlled internal drug release (CIDR) device preceding equine chorionic gonadotrophin(eCG) protocol to induce synchronized fertile estrus and improve reproductive performance of Anglo-Nubian and Damascus does during out of breeding seasonwhich lasted from December to May. Forty-eight multiparous does, 24 Anglo-Nubian and 24 Damascusbreeds each wasfurther allocated into two sub-groups, 12 lactating and 12 dry does. Each doe was treated with vaginal inserted CIDR device for a period of 19 days in association with injectionof 500 international units of eCGon the day of removal of CIDR. Samples of Serum were takenfrom each doe at day zero (CIDR insertion), day 19 (CIDR-removal), day 21 (mating), day 39 and day 56 (day 18 and day 35 after mating, respectively). Anglo-Nubian does showed higher concentration of serum progesterone and lower estradiol: progesterone (E2:P4) ratio compared to Damascus does. Lactating does of both breeds, produced higher estradiol and lowertotal antioxidant capacity (TAC) concentrations compared to dryones.  All does, achieved estrus after CIDR removal and eCG injection, but longer intervals to showestrus were recorded by lactating compared to dry goats. Anglo-Nubian does recorded higher prolificacy and fecundity compared to Damascus. In addition, the fecundity of lactating does was lower than that of dry goats. In conclusion, CIDR-eCG protocol induced successfully fertile estrus in both breeds. However, response of Anglo-Nubian does to CIDR-eCG protocol was superior to that of Damascus as evidenced by higher prolificacy and fecundity during non- breeding season.  
Keywords
Goats; reproductive seasonality; CIDR-eCG protocol; prolificacy; fecundity; Total antioxidant capacity
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