فهرست مقالات beef cattle

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  1 - Recent Nutritional Advances to Mitigate Methane Emission in Cattle: A Review
  A. Hadipour ا. محیط H. Darmani Kuhi F. Hashemzadeh
  Climate change and preventative regulations on greenhouse gas (GHG) emissions have forced countries to focus on reducing the emission of GHG by the causative factors. The rapid increase in the world population, the culture of urbanization and enhanced income of human so چکیده کامل

  Climate change and preventative regulations on greenhouse gas (GHG) emissions have forced countries to focus on reducing the emission of GHG by the causative factors. The rapid increase in the world population, the culture of urbanization and enhanced income of human societies over the past few decades have raised concerns about more effective and sustainable ways of the food supply with minimum adverse effects on the environment. The livestock sector is very important in terms of meat, milk, and eggs, that all of them are important and high-quality constituents of human nutrition. Despite the value of these products, livestock and poultry have not ever been without a detrimental effect on the environment, and the challenge for researchers and scientists in this field has tried to minimize these adverse effects. GHGs such as CH4, CO2 and N2O, and nitrogen and phosphorus disposal are some of them, which affect both the livestock and poultry sector. About 14.5% of total global anthropogenic GHG per year has been attributed to the domestic animal production sector, which is equal to 7.1 gigatonnes of the annual CO2 equivalent (CO2equ) of GHG. Approximately, 44%, 29% and 27% of the sector’s emissions are CH4, N2O, and CO2, respectively. Methane production and N2O emission in ruminants are not only effective on the environment but also on animal performance, so the use of multipurpose strategies to reduce the emission of these compounds can improve livestock performance in addition to positive environmental impacts. Since more than 54% of the annual production of CO2equ has been accounted for beef cattle, using different mitigation strategies in this section is more essential. The present review aimed to summarize the current knowledge and findings of the influencing factors on GHG emissions from beef cattle. پرونده مقاله
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  2 - Gasconne Beef Breed, an Explorative Study of Trans‐Border Differences in Management and Commercialization
  A. Guerrero C. Sanudo J.A. Mateas S. Caillaud W.S. Sepulveda J. Toustou J.P. Gajan P. Santolaria
  This study describes the management and products of the Gasconne cattle in two neighbouring countries (Spainand France), as a model study in trans-border breeds, analysing if they are significantly different depending on the place where they are located. Fifty-seven Gas چکیده کامل

  This study describes the management and products of the Gasconne cattle in two neighbouring countries (Spainand France), as a model study in trans-border breeds, analysing if they are significantly different depending on the place where they are located. Fifty-seven Gasconne breeders were interviewed (32 inSpainand 25 inFrance). The survey examined several aspects of the productive farming system and trading procedures. Descriptive statistics and multivariate analysis were used to understand the relationships between variables and establish the difference between countries. The herd size was similar in both countries but not the animal age distribution. Moreover, statistical differences were found in the replacement rate and age at weaning, both higher in France. Different reproductive management was also found between countries. Thus, seasonal reproductive control and the use of artificial insemination were only common in France. The herd production system was, in general terms, more intensive in Francethan in Spain. There was significant percentage of breeders, in both countries, which carried out their own fattening. The main products supplied and their trading channels were also different. Thus, yearlings and calves were the most common products in Spainwhereas in Francethe focus was on cows, young calves for fattening and oxen. With respect to the trading channel, the sale of live animals directly to other breeders or slaughterhouses, was the most common option used in Spaincompared to the sales to cooperatives, intermediaries and butchers reported in France. It has been demonstrated that there are significant differences among productive systems of the same breed even between neighbouring regions. پرونده مقاله
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  3 - Costs and Benefits of Beef Cattle Fattening Schemes in some Selected Areas of North West Tanzania
  J.L. Malole R.J.M. Kadigi A.Z. Sangeda
  This study highlights the costs and benefits of indigenous beef cattle fattening schemes in Shinyanga Urban and Kishapu Districts in Tanzania. Specifically, in this study the net profit (NP) for fatteners between beef cattle fattening schemes has been determined. The sc چکیده کامل

  This study highlights the costs and benefits of indigenous beef cattle fattening schemes in Shinyanga Urban and Kishapu Districts in Tanzania. Specifically, in this study the net profit (NP) for fatteners between beef cattle fattening schemes has been determined. The schemes were divided into two main categories, scheme 1 in which the animals were fed on cottonseed hulls (CSHL) based diets and scheme 2 on cottonseed cake (CSC) based diets.The survey was carried out using a sample of 144 respondents. The tools for data collection were structured questionnaire, interview, personal observation, communication, documentary reviews (e.g. from internet, libraries) and key informants. Data were analysed using descriptivestatistics and quantitative statistics and standard procedure of theassociation of official analytical chemists.Results show that the positive net profit was relatively higher in scheme 2 (Tanzanian shilling (TAS) 119512.87 / USD 76.03 per fed animal per quarter a year) than that in scheme 1 (TAS 92993, 90 / USD 59.17 per fed animal per quarter a year). This implies that the fattening business is more feasible, profitable and efficient for sustainable implementation in scheme 2. Furthermore, the average daily gains (ADG) of 1.5, 1.3 and 1.0 for Tanzania Short Horn Zebu (TSHZ) males, steers and females were higher than the 1.2, 1.0 and 0.9 for TSHZ males, steers and females in scheme 1, respectively. Additionally, the feed conversion ratios (FCRs) of about 5.0, 5.5, 6.3 for TSHZ males, steers and females in scheme 2 were lower than 7.2, 8.6, 8.6 for TSHZ males, steers and females in scheme 1. Therefore, scheme 2 was economically feasible, profitable and therefore is recommended for implementation and monetary support for improved income, livelihoods, poverty reduction and commercialisation of the beef industry. پرونده مقاله
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  4 - مطالعه میزان آلودگی گوشت گاو عرضه شده در سطح شهرستان سنندج به Escherichia coli و تعیین سویه‌های فیلوژنیک آن‌ها
  هیوا کریمی دره ابی
  10.30495/vmj.2022.701371
  اشریشیاکلی سالهاست به عنوان یکی از مهم‌ترین عوامل مسمومیت‌های غذایی و بیماری‌های روده‌ای مطرح بوده که با تولید انواع توکسینها می تواند باعث گاستروانتریت و کولیت خونریزی کننده در انسان و حیوانات گردد و از طریق فراورده‌های غذایی به انسان قابل انتقال می‌باشد.هدف از این مطا چکیده کامل

  اشریشیاکلی سالهاست به عنوان یکی از مهم‌ترین عوامل مسمومیت‌های غذایی و بیماری‌های روده‌ای مطرح بوده که با تولید انواع توکسینها می تواند باعث گاستروانتریت و کولیت خونریزی کننده در انسان و حیوانات گردد و از طریق فراورده‌های غذایی به انسان قابل انتقال می‌باشد.هدف از این مطالعه بررسی میزان گروههای فیلوژنیک(A, B1, B2،D (اشریشیاکلی جدا سازی شده از گوشت گاو توزیع شده در سطح شهرستان سنندج می باشد. برای این منظور 80 نمونه گوشت گاو تازه عرضه شده در سطح قصابی ها و فروشگاه های عرضه گوشت سنندج در شرایط استریل نمونه برداری شده و برای شناسایی اشریشیاکولای با روش‌های کشت متداول جداسازی اشریشیا کلی و تاییدیه پرگنه های مشکوک به اشریشیاکلی با استفاده از روش PCR از پرایمرهای اختصاصی ژن uidA و سپس برای تعیین گروه‌های فیلوژنیک (A، B1، B2 و D) با استفاده از آزمون Multiplex PCR از پرایمرهای اختصاصی دو ژن chuA و yjaA و قطعه DNA ناشناس TspE4C2 استفاده گردید. نتایج حاصل از کشت میکروبی و مولکولی نشان داد که از 80 نمونه گوشت گاو ، 34 نمونه (42.5%) آلوده به اشریشیاکلی اعلام گردید.نتایج حاصل از تست Multiplex PCR نشان داده شد که از 34 نمونه اشریشا کلی، B2 (2) 8/5درصد ،گروه D ( 8 )62/23 درصد ،گروه B1 (3) 82/8درصد و گروه A (21 ) 76/61 درصد قرار گرفتند.نتایح نشان داد که مواد غذایی با منشا دامی یکی از مهمترین عوامل انتقال اشریشیا کولای بیماریزا به انسان می باشد . پرونده مقاله