共查询到17条相似文献,搜索用时 109 毫秒
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对骆驼科的3属6种动物,双峰驼、美洲驼、羊驼、原驼和骆马的地理分布、形态特征、饮食习性、行为学、生殖特性及生存环境等进行了系统的阐述,以期为人们在研究骆驼科动物的生物学特性时提供参考. 相似文献
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羊驼是产于南美的秘鲁和智力高原地带的一种骆驼科动物,外形与绵羊类似,属于偶蹄目、骆驼科动物,体重一般在55~65千克左右。羊驼属于群居动物,一般每十只或数十只聚集成一个群体,生活在海拔高于4 000米的高原地带,每个群体由一只最雄壮的雄驼率领,以高原的荆棘植物为食。 相似文献
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在骆驼科中,除了人们熟知的双峰驼和单峰驼以外,还有无峰驼、羊驼、美洲驼和骆马,后者都产于美洲,所以有人统称它们为美洲骆驼。为了摸清美洲骆驼的基本情况,美国动物生态学家威廉L·富兰克林于1968年至1988年到它们的主要栖息地进行长达20年的实地考察。据统计,今天南美洲大约有750万头骆驼科动物。其中90%生活在秘鲁和玻利维亚高地。就种类而言,南美洲共 相似文献
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骆驼科均属偶蹄目(双趾蹄),骆驼亚目(脚有肉垫),骆驼科。骆驼科内有多种类型和品种,欧洲骆驼属有双峰驼和单峰驼两种,美洲羊驼属有三种,而小羊驼属只有—种,这可能是适应了各种环境进化的结果。 相似文献
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Tyler JW Middleton JR Tessman RK Nagy DW 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2006,20(2):407-409
Computer records were accessed documenting in-hospital accessions to the food animal service maintained by the University of Missouri, College of Veterinary Medicine between January 1, 2001 and December 6, 2004. For each species category, the prevalence and relative risk (RR) of after-hours admission were calculated. The prevalence of after-hours visits varied from 0.040 for swine to 0.234 for South American camelidae. Using cattle as a reference level, the relative risk for an after-hours admission was decreased in swine (RR = 0.51) and increased in South American camelidae (RR = 3.04) and sheep or goats (RR = 1.66). The likelihood of an after-hours admission differed significantly among groups. 相似文献
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随着社会经济水平的提高,人们对动物性食品的需求量显著扩大,对其安全性的要求也越来越严格。因此,家畜疾病的科学防控就显得尤为重要。目前,我国家畜疾病尤其是传染病的防控效果并不理想,仍需要不断开发和探索新的防控产品和防控策略。纳米抗体是最小的功能性抗原结合片段,和传统抗体相比,其具有分子量小、结构简单、稳定性高、易于基因改造、抗原特异性好、组织穿透力强等优点。纳米抗体源于骆驼科动物,作为一种新型抗体,在动物疾病防治技术中的研究和应用正逐步增加。本文重点综述纳米抗体在家畜传染病中的应用和研究进展,并结合发展趋势预测未来的研究重点。 相似文献
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试验旨在系统地分析不同的季节、泌乳阶段、产地和奶站驼乳理化指标的差异。收集了某公司2015年收购生驼乳质量检测数据18 372条,通过四分位数检验法确定了各指标的变化范围,对处理后的数据进行最小二乘方差分析。结果显示,不同的产地、奶站、泌乳阶段和季节驼乳的相对密度、脂肪、非脂乳固体、乳蛋白、乳糖、冰点、灰分有极显著差异(P<0.01)。因此,双峰驼繁殖和分娩具有较强的周期性和季节性,导致在一年内的不同季节和月份驼乳的产量和理化指标有较大的区别,同时驼乳生产企业可以通过此类分析获知不同的产地、奶站、泌乳阶段和季节的驼乳质量情况,驼乳产品的质量取决于生驼乳的理化指标和卫生状况。 相似文献
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ZHANG Meng-hua CHEN Gang-liang ZANG Chang-jiang DONG Jing HUANG Xi-xia LU Dong-lin 《中国畜牧兽医》2016,43(10):2628-2633
This study was aimed to systematically analyze the difference of camel milk physicochemical index of different seasons,stage of lactation,production sites and milk station.Collected 18 372 testing data about raw camel milk quality which were purchased by a company in 2015.The range of each index was determined by the four point test method,SAS 8.1 least squares analysis of variance were performed on the processed data.The results showed that different area,milk stations,stage of lactation and season effect of camel milk had extremely significant influence (P<0.01) on the relative density,fat,non fat milk solid,milk protein,lactose,freezing point and ash.Therefore,the reproduction and childbirth of Bactrian camel had strong periodicity and seasonality,lead to a larger difference in camel milk yield and physicochemical index of different seasons and months within a year,at the same time,camel milk producers could learn about the quality of camel milk situation of different production sites,milk station,stage of lactation and season using such analysis methods,the quality of camel milk product was determines by the physical and chemical indicators and health conditions of the raw camel milk. 相似文献