野猪幼年的生长环境对成年时精液生产的影响

在野猪生命中头 3个月精原细胞量将决定成年公猪的精原细胞的总量。很少有对照试验来证明在野猪青年期不同的环境因子对成年野猪精液产量方面的影响。本试验的目的在于揭示同日龄哺乳期小野猪的尺寸对成年野猪精子产生方面的影响。1　试验方法刚出生的小野猪公母混群每组被随机分成 6头、1 2头进行饲养 ,每组的公母数量相等。 2 1 d断奶后直到 90日龄为止 ,2组处理哺乳期间的小猪都保持群体完整与足够空间 ,圈舍面积 2 .8m2 /头。在 90 d时公母分离 ,并随机将公猪 3头 1组圈养 ( 8.36m2 /头 )。到 1 5 0 d龄 ,全部野猪单圈饲养 ( 2 2 m2 /头…     

鸵鸟的生活习性及养殖技术

鸵鸟原产于非洲和阿拉伯干旱沙漠中 ,是世界上体型最大的鸟类。广义上的鸵鸟包括非洲鸵鸟、美洲鸵鸟和澳洲鸵鸟三种 ,人工养殖以非洲鸵鸟为多。鸵鸟最早驯养于南非及澳洲 ,随后美国和加拿大等国相继引进饲养。我国从 1 992年开始引进饲养 ,在全国发展很快。1　形态特征鸵鸟雄性羽黑色 ,雌性呈灰色。头小 ,眼圆而大 ,嘴似鸭嘴 ,颈长 ,躯短呈卵圆形 ,两翅退化 ,腿高而粗壮 ,无距。成年鸵鸟体高 2 3～ 2 5ｍ ,身长 1 8～ 2 0ｍ ,体重 1 40～2 0 0ｋｇ。有腺胃和肌胃两个胃 ,有两条发达的盲肠 ,脾脏呈长圆柱形 ,胸骨扁平 ,无突起 ,阴茎扁而…     

大型肉用牛良种的介绍

1利木赞利木赞牛体躯呈圆筒状,头短,额宽,嘴小。公牛角粗而短,略向外卷曲,并向两侧伸展,母牛角细向前弯曲。四肢强壮,较细。全身骨骼较夏洛来牛略细。背腰及臀部肌肉丰满,胸宽、深,背腰较短,肋圆,尻平。被毛为黄棕色。优秀个体者,成年公牛体重为950-1 200千克,母牛为600-800千克。初生重,公犊牛为36千克,母犊牛为35千克。成年公牛体高平均为140厘米,母牛平均为130厘米。犊牛初生重相对较小,成年体重较大的性状,是现代肉牛业追求的优良性状。     

野猪的外貌特征及配种技术

(一)外貌特征 野猪毛一般为灰黑色或褐(棕)红色,小猪崽长有条状花纹,毛粗而稀,毛几乎从颈部长至臀部,蹄黑色。野猪耳失而小,紧贴耳背,嘴尖而长,头部和腹部较小,脚高而细,背直不凹,尾比家猪短,雄性野猪具有尖锐的牙齿。纯度越     

人工养殖水貂的繁殖技术

水貂(American Mink)属于哺乳纲食肉目鼬科鼬属的小型珍贵毛皮动物,原产于北美洲,长期生活在北纬40度以北的地区.其体细长,头粗短,耳壳小,四肢短,趾间有微蹼.水貂体呈黑褐色,至尾端几乎为黑色;颏白色,有的腹有白斑.水貂的尾巴蓬松,长约为体长的一半.成年公貂体长约38～42 cm,体重1.6～2.2 kg;成年母貂体长约34～37 cm,体重0.7～1.1kg.     

特种野猪的饲养管理

1特种野猪的特点特种野猪是选用优良山林雄性野猪与优良瘦肉型家猪进行杂交后,经人工选育形成的野猪新品种。特种野猪基因稳定,公母猪可长期作种繁殖。幼猪头部呈棕黑色,耳朵小,嘴巴长,体两侧各有数条黄棕色条纹(该条纹3～4个月后渐褪,变成黄褐色),故取名为特种野     

特种野猪的饲养管理

1 特种野猪的特点 特种野猪是选用优良山林雄性野猪与优良瘦肉型家猪进行杂交后,经人工选育形成的野猪新品种.特种野猪基因稳定,公母猪可长期作种繁殖.幼猪头部呈棕黑色,耳朵小,嘴巴长,体两侧各有数条黄棕色条纹(该条纹3～4个月后渐褪,变成黄褐色),故取名为特种野猪.     

野猪资源开发利用的研究现状

野猪(Sus linnaeus)属猪科,野猪属.野猪在我国共有5个亚种:台湾亚种、川西亚种、新疆亚种、东北亚种和华南亚种.野猪体形与家猪相似但头部较长,吻显著前突、耳竖立,雄性上犬齿发达,可长达70mm.四肢较短,中间两趾较大、侧趾较小,尾细,背部鬃毛发达,长约144mm.体重约150kg,最大的雄性个体可达250kg.成年野猪体长约1～2m,毛全黑或棕黑色.     

野猪饲养高效益适时配种是关键

野猪的毛色比较一致，呈暗褐色或棕黑色，是一种保护色，适合于野生环境。野仔猪呈淡黄褐色，背部有6条淡黄色条纹。野猪毛稠密而坚硬，背上鬃毛发达，长约14cm，皮肤粗厚。野猪头部较长，吻显著前突，耳竖立。野猪（尤其是公野猪）犬齿发达，长约7em。野猪身躯窄而浅，前躯发达，背腰短，腹部紧缩，背线前高后低。     

波尔山羊杂交优势利用和技术操作

1 总则1．1 改良方向 我区山羊改良的方向是，用引进的纯种波尔肉羊杂交，使其向生长快、耐粗饲、产肉多、繁殖率高、适应性强的肉皮兼用型方向转化，以培育出“万州肉山羊”新品种。1．2 “万州肉山羊”新品种的理想型标准1．2．1 体型外貌 被毛白色，短有光泽，头、耳呈棕红色，额部“白带”明显，耳宽大下垂；1．2．2 体型结构 体质结实，结构匀称，胸肩部宽厚饱满，肋骨开张良好，背腰宽阔厚实，臀部宽长浑圆，四肢高大强健，全身肌肉发达，性情温顺，合群性强；1．2．3 体尺 成年公羊体高95cm左右，体重90～135kg；成年母羊体高82cm左…     

Disease and destiny-mystery and mastery

When early people made their appearance, zoonotic infectious diseases were already waiting, but epidemic diseases did not appear in human history until people began to live in large numbers under conditions of close contact, mainly during the last 10,000 years. Disease has decimated urban populations, conquered armies, and disrupted society. The focus here is on (1) the plague of Athens and the Black Death; (2) smallpox, influenza, and rabies; (3) avian influenza prion diseases, and foot & mouth disease; and (4) emerging and re-emerging diseases. All have veterinary public health associations. In Athens, Greece, in 430 BC, when the Spartans ravaged the countryside, hordes crowded into Athens so that orderly movements, space in which to live, and adequate supplies of food became impossible. Crowding of any population fosters disease transmission; chaos and disorder enhance it all the more. Out of northern Egypt came a terrible plague from across the Mediterranean Sea. The identity of the plague of Athens remains unsure, but the well-considered conclusion is Rift Valley Fever, a mosquito borne, viral zoonosis. The Black Death, also called the Plague, raged in Asia for centuries. In 1347, the Black Death was brought by a ship out of Asia to Sicily. The scenes of devastation were repeated throughout Europe, with 90% or more of the people dying in city after city. Influenza, too, has been a cause of periodic human epidemics, but the great pandemic of influenza occurred in the last months of World War I. In the years of highest occurrence, more than half the world's population became clinically infected. If veterinary public health had been born earlier, it could have led to elucidating the epidemiology of influenza and the plagues of Athens, Europe, and Asia. In turn, smallpox had also caused continual tragedy. In 1796, Edward Jenner began to harvest pustules of cowpox from children or infected cows and inject them into susceptible children. In 1980, the World Health Organization declared that smallpox had been eliminated from the world. Rabies, though, still strikes terror. A number of animal diseases, broadly termed emerging and re-emerging diseases, need surveillance because they have the potential to impact human health. From late in 2003 to 2007, the highly pathogenic H5N1 influenza virus in poultry infected at least 121 people and caused 62 deaths in four countries. The prion diseases, too, all have very high numbers in concentrated contacts. To control these diseases, veterinary public health is essential, with diagnosis, epidemiological surveillance, clinical manifestations, and prevention as primary measures.     

Foot and mouth disease and bluetongue: differences and similarities

On 26th of july 2007 a new case of bluetongue was notified in the Netherlands and on 2nd of august 2007 foot-and-mouth disease was diagnosed in Surrey, England, which raised the threat of having both infections simultaniously in one area. Bluetongue and foot-and-mouth disease have a different pathogenesis, but symptoms may resemble each other at a later stage of infection. The pathogenesis and possible clinical symptoms of both infections are discussed and illustrated with pictures.     

奶牛肢蹄病及其防治

简介常见奶牛肢蹄病种类及其症状,从日粮营养、运动场地面结构、环境卫生、饲养管理、遗传育种、疾病管理等方面简析奶牛肢蹄病的病因,并提出相应的预防措施。     

德国荷兰畜禽产品质量安全交流与启示

2018年岁末,笔者有幸赴德国和荷兰,就畜产品质量安全控制及检测技术等进行了短期交流,收获颇丰,现具体介绍如下。一、交流情况德国面积35.73万平方千米,人口约8175.2万,是欧盟人口最多的国家,农业发达,机械化程度很高。德国的畜牧业以猪、牛、羊和禽类为主,畜牧业产值占农业生产总值的61%。德国虽然农业比重很小,但却是有机农业运动最早的发起国,也是目前世界上有机农产品生产与消费大国。     

畜禽物种多样性及其保护和利用

文章就我国畜禽物种多样性资源的现状、保护和利用等方面进行阐述,为生态脆弱的喀斯特地区畜牧业可持续发展提供参考。     

马的咽气癖及其防制措施研究进展

在动物的异常行为中以刻板行为最为常见,而咽气癖又是马最常见的口部刻板行为之一。作者就咽气癖在生理方面和心智方面对马体产生的影响、行为基础、诱因的研究进展及常见的防治措施进行综述。     

国内外蛋氨酸与赖氨酸市场分析与展望

近几年,世界饲用添加剂市场增长较快,预计今后将进一步增长,据世界粮农组织(FAO)首领会议的倡议,到2015年,将使世界营养不良的人口削减一半,其间,肉制品将会以每年2％的速度增长,特别是加快猪肉和禽肉增长。这将促进世界添加剂,尤其是蛋氨酸和赖氨酸需求量的增加。     

牛羊焦虫病诊断与防治技术

近几年来,辽宁省牛羊饲养业迅速发展,焦虫病的危害越来越明显,已成为危害牛羊的主要疾病之一。为了提高牛羊焦虫病的防治水平,保证我省牛羊饲养业的健康发展,笔者在参阅文献和同行们诊疗经验的基础上,结合自己的治疗实践,详细阐述了我省牛羊焦虫病近几年的流行特点和诊断防治方法。