南非地方绵羊品种同步发情后繁殖性能的比较研究

Q3 Veterinary

American Journal of Animal and Veterinary Sciences Pub Date : 2022-01-01 DOI:10.3844/ajavsp.2022.1.10

J. Ngcobo, T. Nedambale, T. C. Chokoe, F. V. Ramukhithi

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引用次数: 1

摘要

通讯作者:Jabulani Nkululeko Ngcobo Tshwane科技大学动物科学系，Private Bag 680，比勒陀利亚，0001，南非电子邮件:jabulaninkululeko@gmail.com本研究的目的是比较年龄和活体重对南非本土绵羊品种(祖鲁羊36只、巴佩迪羊26只、达马拉羊10只和纳玛卡阿非利卡羊9只)的发情反应、持续时间、妊娠率和产羔率的影响。将对照阴道内药物释放器(CIDR)插入阴道10天。尾巴的抽动和在挑逗公羊面前站起来是最有针对性的发情迹象。对数据进行适当的方差分析(ANOVA)。分数采用1:1频率表，等比例检验采用卡方(2)检验。1只Bapedi母羊在移除日期前丢失CIDR，因此从实验动物中移除。所有母羊(100%)的发情期最长(70.7±7.2 h)，受孕率最低(44%)，产羔率最低(44%)。不同品种的发情时间无显著差异(P < 0.05)。4岁母羊对发情同步的反应优于≤3岁、5岁和≥6岁母羊。然而，6岁以上母羊受胎率(94%)和产羔率(84%)较高。祖鲁羊的产羔率(89%)高于达马拉羊(60%)和纳马夸阿非利卡羊(44%)。较轻母羊的受胎率(83%)和产羔率(90%)分别高于较重母羊(77%和64%)和中等母羊(68%和78%)。综上所述，在发情期同步后，祖鲁羊比其他南非地方品种更肥沃。另一方面，幼母羊(≤3岁)产羔和断奶重较重，但由于缺乏经验，死亡率较高。

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A Comparative Study on the Reproductive Performance of South African Indigenous Sheep Breeds Following Oestrus Synchronization

Corresponding Author: Jabulani Nkululeko Ngcobo Tshwane University of Technology, Department of Animal Sciences, Private Bag 680, Pretoria, 0001, South Africa Email: jabulaninkululeko@gmail.com Abstract: The aim of the study was to compare the effect of age and live body weight on the oestrus response, duration, pregnancy rate and lambing rate among South African indigenous sheep breeds (Zulu sheep = 36, Bapedi sheep = 26, Damara sheep = 10 and Namaqua Afrikaner sheep = 9). Control Intravaginal Drug Release Dispensers (CIDR’s) were inserted into the vagina for 10 days. The twitching of tail and standing to be mounted in the presence of the teaser ram were most targeted signs of oestrus. Data were subjected to an appropriate analysis of variance (ANOVA). The scores were subjected to 1:1 Frequency table and a Chi-Square (2) test for the equal proportions test. One Bapedi ewe loss CIDR before removal date hence was removed from the experimental animals. All Namaqua Afrikaner (100%) ewes responded to the synchronization protocol with the longest oestrus duration (70.7±7.2 h). However, Namaqua Afrikaner sheep scored the lowest rate for conception (44%) and lambing (44%). No significant different (P>0.05) observed for the onset of oestrus among the breeds. Four years old ewes responded better to oestrus synchronization than ≤3, 5 and ≥6 years. Nevertheless, ewes that were ≥6 years old had higher conception rate (94%) and lambing rate (84%). Zulu sheep had higher (89%) lambing rate than Damara (60%) sheep and Namaqua Afrikaner (44%) sheep. Lighter ewes had higher conception (83%) and lambing rate (90%) than heavier (77 and 64%) and moderate (68 and 78%) weights, respectively. In conclusion, Zulu sheep were more fertile than other South African indigenous breeds following oestrus synchronization. On the other hand, young ewes (≤3 years) produced heavier lambs and weaning weight but had higher mortality rate due to inexperience.

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来源期刊

American Journal of Animal and Veterinary Sciences Veterinary-Veterinary (all)

CiteScore

1.90

自引率

0.00%

发文量

期刊介绍： American Journal of Animal and Veterinary Sciences, a quarterly, peer reviewed publication and is dedicated for publication of research articles in the field of biology of animals and with the scientific understanding of how animals work: from the physiology and biochemistry of tissues and major organ systems down to the structure and function of bio molecules and cells; particular emphasis would given to the studies of growth, reproduction, nutrition and lactation of farm and companion animals and how these processes may be optimized to improve animal re- productivity, health and welfare. Articles in support areas, such as genetics, soils, agricultural economics and marketing, legal aspects and the environment also are encouraged. AJAVS is an important source of researcher to study articles on protection of animal production practices, herd health and monitoring the spread of disease and prevention in both domestic and wild animals.