Postpartum Reproductive Performance of High and Low Milk Yield Lactating Maghrebi She-Camels | ||
| Veterinary Medical Journal (Giza) | ||
| Volume 63, Issue 3, July 2017, Pages 55-65 PDF (6.79 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/vmjg.2017.355064 | ||
| Authors | ||
| M Madboly* ; A Helmy* ; H El-Metwaly* | ||
| Animal Production Research Institute, Agricultural Research Center, Dokki Giza. Egypt | ||
| Abstract | ||
| The objective of this study was to investigate the relationship between milk yield level in the first 21 weeks of lactation and post-partum reproductive performance of dromedary she-camels. A total of 14 female camels were equally divided into two groups according to their previous lactation milk yield level as high (≥ kg milk per day) and low (<4 kg milk per day) milk yield groups. Camels were examined by ultrasonography weekly after parturition. Blood samples were collected for progesterone assay after mating. Results revealed that average of daily milk was (5.53+0.1kg. VS. 3.32 +0.1kg) for high and low milk groups, respectively. Interval from calving to first estrus was a bit similar in both groups average was (29.8 days). The low milk group tended to have significant increase of first and second postpartum estrus duration (42.44+3.3h and 54.0+42.44h), comparing with the high milk group (23.9+1.0h and 37.1+3.4h). The mean: interval for uterine involution was almost the same in both high and low groups (30.6 day). Serum progesterone after mating was basal in low milk group, while increased in 3 camels of high milk group. Ovarian ultrasound examination during eight weeks postpartum revealed follicular growth in high milk group; estrus was detected in 6/7 females and ovulation occurred in 3/7 (43%) of mated camels; while, low milk group showed less follicular growth; estrus was detected in 4 camels, but with absence of corpus luteum. It was concluded that high milk yield did not negatively affect postmortem reproductive performance. | ||
| Keywords | ||
| Dromedary camels; reproductive performance; ovarian activity; milk yield | ||
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