基于形态计量特征和动物计量指数的埃塞俄比亚土著山羊种群分化:保护的首要步骤

B. Tade, A. Melesse, S. Betsha
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摘要

摘要本研究基于形态特征和身体指数对埃塞俄比亚南贡达尔地区的山羊种群进行了描述。为此,从三个地区(Farta、Fogera和Libokemkem)抽取的512只雌雄山羊(153只公山羊和359只母山羊)进行了形态计量学测量。从形态测量中计算了20个结构指数。结果表明,幼犬首次开玩笑年龄为13.6个月,开玩笑间隔时间为8.39个月,平均产仔数为1.54只。雄鹿除耳长(EL)、臀宽(RW)和前臀围(FCC)外,其他性状均受性别影响(p<0.001)。年龄对所有形态计量性状的影响均显著(p<0.001),但EL随年龄增长呈线性增加。除EL和阴囊周长(SC)外,其他数量性状均受饲养地区的影响(p<0.01)。因此,福格拉山羊的活重(LW)、胸围(HG)、肩高(HW)、体长(BL)、胸宽(CW)、臀高(RH)、臀长(RL)和乳长(TL)均高于利博凯肯山羊。与法尔塔山羊相比,福格拉山羊的LW和HG最高。相反,法尔塔山羊的RW、BL、TL、RL、CW、胸深(CD)和腹围(PG)均高于利博肯姆山羊。利博肯姆山羊的大部分形态计量性状都较差。HG和HW变量均被确定为两性LW的最佳预测因子。结构指标表明,山羊种群具有肉型表型,腿短,适应中部海拔高度。综上所述,该地区饲养的山羊具有良好的遗传潜力,具有良好的繁殖能力。福格拉山羊在大多数形态计量学性状上表现得特别好,表明它们适合商业肉类生产。但是,建议进行进一步的实地研究,以验证它们作为肉类动物的潜力,以加强该区域的粮食安全。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Differentiation of the indigenous goat populations in Ethiopia based on morphometric features and zoometric indices: The primary step for conservation
Abstract. This study was conducted to describe the indigenous goat populations of South Gondar, Ethiopia based on morphometric traits and body indices. To this effect, morphometric measurements were taken from 512 goats (153 male and 359 female) of both sexes drawn from three districts (Farta, Fogera and Libokemkem). Twenty structural indices were computed from morphometric measurements. Results indicated that age at first kidding and kidding intervals was 13.6 and 8.39 months, respectively, with an average litter size of 1.54 kids. Sex affected (p<0.001) all quantitative traits except ear length (EL), rump width (RW) and fore canon circumference (FCC) being higher in bucks than in does. The effect of age was significant (p<0.001) for all morphometric traits except for EL resulting in a linear increase with advancing age in both sexes. Except for EL and scrotal circumferences (SC), all quantitative traits were (p<0.01) affected by district of the goats rearing. Accordingly, Fogera goats had higher live weight (LW), heart girth (HG), height at withers (HW), body length (BL), chest width (CW), rump height (RH), rump length (RL) and teat length (TL) than those of Libokemkem. Fogera goats had also the highest LW and HG compared with those of Farta. Conversely, the Farta goats had higher RW, BL, TL, RL, CW, chest depth (CD), and paunch girth (PG) than those of Libokemkem. Libokemkem goats were inferior in most of the studied morphometric traits. Both HG and HW variables were identified as best predictors of LW in both sexes. Structural indices indicated that the goat populations could be characterized as meat phenotype with short legs being well adapted to midland altitudes. In conclusion, goats reared in the region could have a genetic potential for meat production with very good prolificacy. The Fogera goats were particularly better in most morphometric traits indicating their suitability for commercial meat production. However, further on-station research is recommended to verify their potentials as meat animals for enhanced food security in the region.
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