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Research Aspects in Agriculture and Veterinary Sciences Vol. 1最新文献

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Study on the Effect of Day Length and Seasonal Variation on Haematological, Biochemical and Hormonal Traits of Indigenous Guinea Fowl (Numida meleagris) in Ghana 日长和季节变化对加纳本土珍珠鸡血液学、生化和激素性状影响的研究
Pub Date : 2021-07-15 DOI: 10.9734/BPI/RAAVS/V1/10520D
K. Okyere, Kagya-Agyemang James Kwame, Annor Serekye Yaw, Asabere-Ameyaw Akwasi, Kyere Gyeabour Clement, Afua Sarpong Asamoa-Bonsu
This study was conducted to investigate the effect of day length and season on haematological characteristics, biochemical and hormonal profiles of laying Guinea fowls (Numida meleagris). Four hens and 1 male were each subjected to 12 hours of light and 12 hours of darkness (12L: 12D), 14hours of light and 10 hours of darkness (14L: 10D), 16hours of light and 8 hours of darkness (16L: 8D) and 18hours of light and 6 hours of darkness (18L: 6D). Each group was replicated three times and reared in three seasons (Dry-December-March, Major rains-April-July and Minor rains-August-November) in a 3x4 factorial experiment. Data were analyzed using General Linear Model procedure of SAS. Significantly (p 0.05) in all parameters except prolactin. The findings of this study suggest that daylength of 14-16hrs and major rainy season in Ghana supports adequate haematological, biochemical and hormonal profiles of Guinea.
本试验旨在研究日长和季节对产蛋珍珠鸡血液学、生化和激素特征的影响。4只母鸡和1只雄性分别接受12小时光照和12小时黑暗(12L: 12D)、14小时光照和10小时黑暗(14L: 10D)、16小时光照和8小时黑暗(16L: 8D)和18小时光照和6小时黑暗(18L: 6D)。每组重复3次,饲养于3个季节(12月- 3月旱季、4月- 7月雨季和8月- 11月雨季),采用3 × 4因子试验。数据分析采用SAS通用线性模型程序。除催乳素外,其余参数均显著(p 0.05)。这项研究的结果表明,加纳的14-16小时的白天长度和主要的雨季支持几内亚足够的血液学、生化和激素特征。
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引用次数: 3
Study on Staphylococcal Species Detected in Digestive Tract of Beavers (Castor fiber) and Their Variability with Properties 海狸(蓖麻纤维)消化道葡萄球菌种类及其性状变异的研究
Pub Date : 2021-07-15 DOI: 10.9734/BPI/RAAVS/V1/3229F
A. Lauková, J. Ščerbová, A. Kandričáková, R. Miltko, G. Bełżecki, M. Simonová
Objective: Staphylococci from beaver`s gut  (Castor fiber) were analyzed as a contribution in the basic microbiology as well as in the part of beaver`s microbiome study. Methodology: Free-living beavers (12), both male and female (aged 4-5 years) were caught with a net in north-east part of Poland Wojewodztwo (Provincie) Podlaskie Gmina-Wizajny, GPS:22o 52E:54o22N and placed in wire cages. Sampling was provided in Poland. Sampling of jejunum (12), colon (12) and caecum (6) was followed the ethic rules for animal handling. Results: Staphylococci detected in jejunum reached amount 2.73 ± 1.16 cfu/g (log 10) on average;  their counts in caecum reached 1.87 ± 0.37 cfu/g on average and in colon 2.89 ± 1.70 cfu/g. After score evaluation using MALDI-TOF mass spectrometry, a high variability in staphylococcal species distribution in beaver`s gut was found; in total, including 18 identified strains, nine species were detected belonging into five clusters; the strains were allotted in the coagulase-negative staphylococcal species. The most frequently detected species were S. hominis and S. haemolyticus (five strains for each). The other species included two strains-S. epidermidis and S. lentus, S. pasteuri, S. cohnii, S. vitulinus, S. warneri, S. xylosus, one strain for each one species. Fifteen strains were deoxyribonuclease and almost haemolysis negative. Ten strains (not depending on the species) showed low-grade biofilm ability formation. Most of  strains were methicillin susceptible with high production of lactic acid. Conclusion: The study is original contribution in staphylococcal microbiome of beavers and gives opportunity in more detail study of individual strain species.
目的:分析海狸肠道(蓖麻纤维)中葡萄球菌在基础微生物学和海狸微生物组研究中的贡献。方法:在波兰Wojewodztwo(省)Podlaskie Gmina-Wizajny东北部,GPS: 220 - 52E:54 - 22n,用网捕获自由生活的海狸(12只),雌雄均有,年龄4-5岁。波兰提供了抽样。空肠(12)、结肠(12)和盲肠(6)的取样遵循动物处理伦理规则。结果:空肠葡萄球菌检出量平均为2.73±1.16 cfu/g (log 10);盲肠平均计数为1.87±0.37 cfu/g,结肠平均计数为2.89±1.70 cfu/g。使用MALDI-TOF质谱法进行评分后,发现海狸肠道中葡萄球菌种类分布具有很高的变异性;其中鉴定菌株18株,共检出9种,分属5个聚集群;菌株分配为凝固酶阴性葡萄球菌种。检出最多的菌种是人链球菌和溶血链球菌(各5株)。其他种类包括s。表皮葡萄球菌和香菇葡萄球菌、巴氏葡萄球菌、柯氏葡萄球菌、白蜡葡萄球菌、瓦尔纳氏葡萄球菌、木糖葡萄球菌各一种。15株脱氧核糖核酸酶检测几乎为溶血阴性。10株菌株(不同菌种)表现出低等级的生物膜形成能力。大多数菌株对甲氧西林敏感,乳酸产量高。结论:本研究是对海狸葡萄球菌菌群研究的原创性贡献,为更详细地研究单个菌种提供了机会。
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引用次数: 0
Feasibility of Artificial Insemination Network for Egyptian Buffalo Development: A Literature Reviews 埃及水牛人工授精网络的可行性:文献综述
Pub Date : 2019-05-03 DOI: 10.6000/1927-520X.2019.08.01.2
I. Soliman, A. Mashhour
Literature reviews confirmed that Egypt has a comparative advantage in milk production rather than red meat production, particularly from buffalo. Furthermore, water resources are becoming increasingly scarce, limiting horizontal expansion in fodder acreage. Furthermore, there is fierce competition between food and feed demand on available agricultural land resources. As a result, horizontal expansion in dairy buffalo stock would be impossible. As a result, the only option for buffalo development in Egypt is vertical expansion through increased milk yield to meet the current deficit in domestic milk production. The Egyptian consumer prefers buffalo milk for its color taste and high content of total solids, particularly fat. Buffalo milk is more expensive than cow milk, and its production is increasing faster than cow milk production. The proposed genetic improvement of buffalo milk yield is being accelerated using an artificial insemination (AI) network. A recent study [1], provided evidence that the return of genetic investment in dairy buffalo would be feasible, (IRR = 19.71%)  However, according to official statistics, Egypt has only two AI-centers for buffalo selected buffalo sires, serving four AI-units. As a result, the goal of this study was to assess the feasibility of establishing an AI-network in Egypt by estimating (NPV, IRR, and payback period) and its sensitivity to unfavorable changes that the proposed program may face. The study used a field survey data collected from an AI-unit of the buffaloes’ semen and an AI-Center for raising buffalo sires in Nile Delta. The findings showed that, while the Egyptian economy's average discount rate was 17.5 %, the estimated IRR for one AI-unit was around 35 % under the most likely scenario. A 10% decrease in semen price and a 10% increase in insemination costs would result in IRRs of approximately 28% and 31%, respectively. Under the most likely conditions, the estimated IRR for the AI-center was around 31%. 10% Decrease in Semen Price, and 10% increase in feed costs or in Sire’s price would result in 26%, 30% or 28% respectively. The lowest sale price of semen dose is thus the most effective variable on the IRR. Unfavorable changes, on the other hand, would keep investments with high incentives in establishing a feasible AI-Network for rapidly increasing the dairy buffalo milk yield.
文献综述证实,埃及在牛奶生产方面具有相对优势,而不是红肉生产,特别是来自水牛的红肉。此外,水资源日益匮乏,限制了饲料面积的横向扩张。此外,粮食和饲料需求之间对可用农业用地资源的竞争也很激烈。因此,奶牛存量的横向扩张将是不可能的。因此,埃及水牛发展的唯一选择是通过提高产奶量来实现垂直扩张,以弥补目前国内牛奶生产的不足。埃及消费者更喜欢水牛奶,因为它的颜色,味道和高含量的总固体,特别是脂肪。水牛奶比牛奶贵,其产量的增长速度比牛奶快。利用人工授精(AI)网络,拟议的水牛奶产量遗传改良正在加速。最近的一项研究[1]提供了证据,证明奶牛遗传投资的回报是可行的(IRR = 19.71%)。然而,根据官方统计数据,埃及只有两个水牛人工智能中心,用于选定的水牛品种,服务于四个人工智能单位。因此,本研究的目的是通过估算(净现值、内部收益率和投资回收期)及其对拟议项目可能面临的不利变化的敏感性,评估在埃及建立人工智能网络的可行性。该研究使用了从水牛精液人工智能单元和尼罗河三角洲水牛养殖人工智能中心收集的实地调查数据。研究结果表明,虽然埃及经济的平均贴现率为17.5%,但在最可能的情况下,一个人工智能设备的估计内部收益率约为35%。如果精液价格下降10%,人工授精成本增加10%,则irr分别约为28%和31%。在最可能的情况下,人工智能中心的估计内部收益率约为31%。10%的精液价格下降,10%的饲料成本或父系价格上升,分别会导致26%、30%和28%的损失。因此,精液剂量的最低销售价格是影响IRR的最有效变量。另一方面,不利的变化将使投资保持高激励,以建立可行的人工智能网络,以快速提高牛奶的水牛奶产量。
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引用次数: 0
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Research Aspects in Agriculture and Veterinary Sciences Vol. 1
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