Utjecaj sezone parenja i stanja tijela na zootehničke parametre ouled djellal ovaca u polupustinjskim područjima

Q3 Veterinary Veterinarska stanica Pub Date : 2024-02-12 DOI:10.46419/vs.55.5.10
Mourad Taherti, Nassima Ait Isad, Nora Mimoune
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Abstract

In this study, a database was created by monitoring 3000 Ouled Djellal ewes, belonging to ten breeding farms and representing two modes of reproduction management. The data collected make it possible to measure the reproductive performance of females and to determine the influence of non-genetic factors on different parameters. The Body Condition Score (BCS) was calculated to compare performance in relation with breeding conditions. The results showed that fertility and prolificacy accounted for 91.1±0.1% and 116.4±0.2% in the reproduction mode respectively based on one lambing/year with exclusive spring control, and of 53.5±0.2% and 101.2±0.1% respectively in the traditional lambing system spread overthe year (with the ram permanently present in the flock) (P<0.05). The BCS varied according to mating season and feeding system. Indeed, as the BCS at mating increased, fertility, prolificacy and productivity improved. Ewes whose BCS at mating was equal to or greater than 3 obtained the best performance, while those with a lower BCS were less fertile, less prolific, and less productive. The average productivity of Ouled Djellal sheep was 107.0±0.1%, and 54.8±0.3%, respectively, in the first and second mode of reproduction management (P<0.05). This study highlights the main sources of variations and their interactions.
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交配季节和身体状况对半普鲁斯提尼亚地区ouuled djellal ovaca动物技术参数的影响
在这项研究中,通过监测 3000 只 Ouled Djellal 母羊建立了一个数据库,这些母羊分属 10 个繁殖场,代表了两种繁殖管理模式。收集到的数据可用于测量母羊的繁殖性能,并确定非遗传因素对不同参数的影响。通过计算体况评分(BCS)来比较繁殖性能与繁殖条件的关系。结果表明,在繁殖模式中,繁殖力和多产性分别占91.1±0.1%和116.4±0.2%,繁殖模式以每年一次产羔为基础,春季完全控制,而在传统产羔系统中,繁殖力和多产性分别占53.5±0.2%和101.2±0.1%(P<0.05)。BCS随交配季节和饲喂系统的不同而变化。事实上,随着交配时 BCS 的增加,受胎率、多产性和生产率都有所提高。交配时 BCS 等于或大于 3 的母羊生产性能最好,而 BCS 较低的母羊繁殖力、多产性和生产性能都较差。在第一和第二种繁殖管理模式下,Ouled Djellal 羊的平均生产力分别为 107.0±0.1% 和 54.8±0.3%(P<0.05)。本研究强调了变异的主要来源及其相互作用。
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来源期刊
Veterinarska stanica
Veterinarska stanica Veterinary-Veterinary (all)
CiteScore
1.10
自引率
0.00%
发文量
57
期刊介绍: The goal of the journal is to provide an international platform for the publication of articles in the fields of veterinary and animal sciences, and biotechnology. The content of the journal is particularly dedicated to veterinary practitioners, but also to veterinary scientists and university professors, to encourage them to share their knowledge and experience on this platform. Manuscripts submitted to the journal may include: original scientific papers, review articles, short communications, professional articles, case reports, conference reports and literary records and reviews of new book either in Croatian or English languages.
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