Sempéré A J, Ancrenaz M, Delhomme A, Greth A, Blanvillain C
Centre d'Etudes Biologiques de Chizé, Villiers en Bois, France.
Gen Comp Endocrinol. 1996 Mar;101(3):235-41. doi: 10.1006/gcen.1996.0026.
The reproduction of the Arabian oryx (Oryx leucoryx) has been studied in a breeding center in Taif (Saudi Arabia). In the first experiment, three groups of females were assigned to groups immediately after calving. In group 1, from the day of calving the females had visual and olfactory but not physical contact with a male. The calves were removed on the day of birth and each female was placed with a male on Day 45. In group 2, females and their calves were placed individually with a male the day after calving. In group 3, females and their calves were kept with neither visual nor olfactory contact with a male and then placed with a male on Day 90. The estrous cycle was deduced from assays of plasma progesterone up to Day 120 after calving. All females exhibited a postpartum estrus a few days after parturition but the occurrence of the estrus was significantly delayed in females of group 3. The length of the estrous cycle was 23.7 +/- 1.3 days and the gestation length was 255.2 +/- 1.5 days. In the second experiment, a group of adult females was formed in 1987 and the intervals between calving recorded over a period of 5 years. The mean interval between calving was 285 +/- 2 days (n = 99 gestations). However, 66.6% of these intervals averaged 276 days whereas 19.2% had averaged 294 and 13% averaged 321 days.
在沙特阿拉伯塔伊夫的一个繁育中心对阿拉伯羚羊（阿拉伯长角羚）的繁殖情况进行了研究。在第一个实验中，三组雌性羚羊在产仔后立即被分组。在第1组中，从产仔当天起，雌性羚羊与雄性有视觉和嗅觉接触，但没有身体接触。幼崽在出生当天被带走，每只雌性羚羊在第45天与一只雄性放在一起。在第2组中，雌性羚羊及其幼崽在产仔后第二天与一只雄性单独放置在一起。在第3组中，雌性羚羊及其幼崽与雄性既没有视觉接触也没有嗅觉接触，然后在第90天与一只雄性放在一起。通过测定产仔后120天内血浆孕酮水平来推断发情周期。所有雌性羚羊在分娩后几天都出现了产后发情，但第3组雌性羚羊发情的出现明显延迟。发情周期长度为23.7±1.3天，妊娠期长度为255.2±1.5天。在第二个实验中，1987年组建了一组成年雌性羚羊，并记录了5年期间的产仔间隔。产仔间隔的平均时间为285±2天（n = 99次妊娠）。然而，这些间隔中有66.6%平均为276天，而19.2%平均为294天，13%平均为321天。
