نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش‌آموخته دکتری ژنتیک و اصلاح دام، دانشکده کشاورزی، دانشگاه صنعتی اصفهان

2 دانشیار ژنتیک و اصلاح دام، دانشکده کشاورزی، دانشگاه صنعتی اصفهان

چکیده

سقط جنین در گاو شیری را می‌توان به دو نوع سقط سبک (سقط بین روزهای 60 تا 260 آبستنی بدون تغییر در نوبت زایش) و سنگین (از دست دادن جنین بعد از روز 200 آبستنی با شروع یک دوره شیردهی جدید)، تعریف نمود. بر اساس این تعریف، زیان­های مالی سقط ممکن است با توجه به نوع سقط در سطح گله متفاوت باشد. برای این منظور، از روش بودجه بندی جزیی، در 6 گله گاو شیری هلشتاین، واقع در استان اصفهان و چهار محال و بختیاری در سال 1399 استفاده شد. در این مدلسازی، زیان مالی ناشی از کاهش در عملکرد تولیدی و تولیدمثلی، زیان­های جایگزینی و از دست رفتن گوساله در نظر گرفته شد. به طور متوسط زیان­های مالی از دست دادن آبستنی 4/27673 هزار ریال به ازای هر مورد، برآورد شد. اگرچه احتمال وقوع سقط سنگین در گله­های مورد مطالعه خیلی کمتر از سقط سبک بود (3/2 در مقابل 5/12 درصد)، اما خسارت قابل توجهی را به دامدار تحمیل می­کند (به­طور میانگین 4/32 در مقابل 0/22 میلیون ریال به ازای هر مورد وقوع سقط). بیشترین زیان ناشی از سقط به دلیل کاهش در باروری (3/63 درصد) بود و کاهش در تولید شیر (8/22 درصد) در رتبه بعدی قرار داشت. نتایج این پژوهش می‌تواند در تصمیم‌گیری بهینه مبنی بر حذف و یا نگهداری گاو سقط کرده در گله های گاو شیری مورد استفاده قرار گیرد.

کلیدواژه‌ها

عنوان مقاله [English]

Estimation of financial losses associated with abortion in‏ ‏dairy herds using partial ‎budgeting model ‎

نویسندگان [English]

  • Hamideh Keshavarzi 1
  • Ali Sadeghi-Sefidmazgi 2

1 Ph.D. Graduate in Animal Breeding & Genetics,, Department of Animal Sciences, Faculty of Agriculture, ‎Isfahan University of Technology, Isfahan, Iran‎

2 Associate Professor in Animal Breeding & Genetics,, Department of Animal Sciences, Faculty of Agriculture, Isfahan University of ‎Technology, Isfahan, Iran‎

چکیده [English]

Abortion in dairy cow can be categorized into two types of abortion: Rebreeding (RA, abortion incidence between 60 and 260 d of gestation, without change in lactation number), and new lactation abortion (NLA, abortion incidence after 200 d in gestation which leads to a new lactation). According to this definition, the losses of abortion might be different based on the type of abortion at the herd level. For this purpose, a partial budgeting model was developed to estimate the losses of abortion in 6 Holstein dairy herds located in Isfahan and Chaharmahal-Bakhtiari provinces during 2020. Financial losses due to reduction in productive and reproductive performances, replacement costs and calf loss were considered in this modeling. On average, loss of pregnancy was estimated 27.7 million IRR per case. Although the probability of NLA incidence was much lower than RA abortion (2.3% vs 12.5%), but NLA imposes significant financial losses to farmers (on average 32.4 million IRR vs. 22.0 million IRR per case). In general, decline in fertility was the most crucial factor of losses (63.3%) due to abortion, and decrease in milk yield (22.8%) placed in the second rank. The results obtained in this study can be used by farmers who make the optimal decision to keep or cull the aborted cows in the dairy farms.

کلیدواژه‌ها [English]

  • Dairy cattle
  • losses due to abortion
  • modeling
  • new lactation abortion
  • rebreeding abortion
  1. Albuja, C., Ortiz, O., Lopez, C. & Hernandez-Ceron, J. (2019). Economic impact of pregnancy loss in an intensive dairy farming system. Vetrinaria Mexico OA, 6(1), 2-8.
  2. Ali, A., Shamsuddin, S. M. & Ralescu, A. L. (2015). Classification with class imbalance problem: A Review. International Journal of Advances in Soft Computing and its Applications, 7, 176–204.
  3. Bartels, C. J. M., Van Schaik, G., Veldhuisen, J. P., Van den Borne, B. H. P., Wouda, W. & Dijkstra, T. (2006). Effect of Neospora caninum-serostatus on culling, reproductive performance and milk production in Dutch dairy herds with and without a history of Neospora caninum-associated abortion epidemics. Preventive Veterinary Medicine, 77, 186-198. DOI: 1016/j.prevetmed.2006.07.003.
  4. Can, M. F., Ataseven, V. & Yalcin, C. (2016). Estimation of production and reproductive performance losses in dairy cattle due to bovine herpesvirus 1 (BoHV-1) infection. Veterinarski Arhiv, 86(4), 499-513.
  5. De Vries, A. (2006). Economic value of pregnancy in dairy cattle. Journal of Dairy Science, 89, 3876-3885. https://doi.org/10.3168/jds.S0022-0302(06)72430-4.
  6. Demir, P. A., Eski, F. & Ütük, A. E. (2020). Estimating the total economic costs of Neospora caninum infections in dairy cows in Turkey. Tropical Animal Health and Production, 52, DO - 10.1007/s11250-020-02351-1.
  7. El-Tarabany, M. S. (2015). Impact of stillbirth and abortion on the subsequent fertility and productivity of Holstein, Brown Swiss and their crosses in subtropics. Tropical Animal Health and Production, 47, 1351-1356.DOI: 1007/s11250-015-0870-z.
  8. Hassanpour, A., Fartashvand, M., Abdollahpour, G., Mogaddam, G., Nadalian, A. & Sattari, G.S. (2007). Seroprevalence of leptospiral infection in dairy herds in Tabriz –Iran. Pajohesh-Va-Sazandegi, 67–77. (In Farsi)
  9. Estimating the total economic costs of Neospora caninum
  10. infections in dairy cows in Turkey
  11. Kalantari, A. S., Mehrabani-Yeganeh, H., Moradi, M., Sanders, A. H. & De Vries, A. (2010). Determining the optimum replacement policy for Holstein dairy herds in Iran. Journal of Dairy Science, 93, 2262-2270. https://doi.org/10.3168/jds.2009-2765.
  12. Kalantari, A., Mehrabani-Yeganeh, H. & Moradi, M. (2008). Evaluation of Economic Losses Due to Abortion and Decision Making Process for Culling Aborted Cow. M.Sc. Thesis. Animal Science Department, University of Tehran, Iran. (in Farsi)
  13. Kaneene, J. B. & Miller, R. (1995). Risk factors for metritis in Michigan dairy cattle using herd- and cow-based modelling approaches. Preventive Veterinary Medicine, 23, 183-200. https://doi.org/10.1016/0167-5877(94)00438-O.
  14. Keshavarzi, H., Sadeghi-Sefidmazgi, A., Ghorbani, Gh. R., Kowsar, R., Razmkabir, M. & Amer, P. (2020). Effect of abortion on milk production, health, and reproductive performance of Holstein dairy cattle. Animal Production Science, 217, 106458. https://doi.org/10.1016/j.anireprosci.2020.106458.
  15. Keshavarzi, H., Sadeghi-Sefidmazgi, A., Kristensen, A. R. & Stygar, A. (2017). Abortion studies in Iranian dairy herds: I. Risk factors for abortion. Livestock Science, 195, 45-52. DOI:1016/j.livsci.2016.11.004.
  16. Mahnani, A., Sadeghi-Sefidmazgi, A. & Keshavarzi, H. (2017). Performance and financial consequences of stillbirth in Holstein dairy cattle. Animal, 1-7. DOI:https://doi.org/10.1017/S1751731117002026.
  17. Norman, H. D., Miller, R. H., Wright, J. R., Hutchison, J. L. & Olson, K. M. (2012). Factors associated with frequency of abortions recorded through dairy herd improvement test plans. Journal of Dairy Science, 95, 4074-4084.https://doi.org/10.3168/jds.2011-4998
  18. Olynk, N. J. & Wolf, C. A. (2008). Economic analysis of reproductive management strategies on US commercial dairy farms. Journal of Dairy Science, 91, 4082-4091. DOI: 3168/jds.2007-0858
  19. Ouweltjes, W., Smolders, E. A. A. Elving, L., Van Eldik, P. & Schukken, Y. H. (1996). Fertility disorders and subsequent fertility in dairy cattle. Livestock Production Science, 46, 213-220. https://doi.org/10.1016/S0301-6226(96)01392-9.
  20. Peter, A. T. (2000). Abortions in dairy cows: New insights and economic impact. Advanced Dairy Technology, 12, 233-244.
  21. Pfeiffer, D. U., Williamson, N. B. & Thornton, R. N. (1997). A simple spreadsheet simulation model of the economic effects of Neospora caninum abortions in dairy cattle in New Zealand. In: Proceedings of the 8th Symposium of the International Society for Veterinary Epidemiology and Economics, Paris, France, pp. 31-32.
  22. Plaizier, J. C., King, G. J., Dekkers, J. C. & Lissemore, K. (1997). Estimation of economic values of indices for reproductive performance in dairy herds using computer simulation. Journal of Dairy Science, 80, 2775-2783. https://doi.org/10.3168/jds.S0022-0302(97)76240-4.
  23. Thurmond, M. C. & Hietala, S. K. (1996). Culling associated with Neospora caninum infection in dairy cows. American Journal of Veterinary Research, 57, 1559-1562.
  24. Thurmond, M. C., Branscum, A. J., Johnson, W. O., Bedrick, E .J. & Hanson, T.E. (2005). Predicting the probability of abortion in dairy cows: a hierarchical Bayesian logistic-survival model using sequential pregnancy data. Preventive Veterinary Medicine, 68, 223-239. https://doi.org/10.1016/j.prevetmed.2005.01.008.
  25. Thurmond, M. C., Picanso, J. P. & Hietala, S. K. (1990). Prospective serology and analysis in diagnosis of dairy cow abortion. Journal of Veterinary Diagnostic Investigation, 2, 274-282. DOI: 1177/104063879000200404.
  26. Thurmond, M. C. & Picanso, J. P. (1990). A surveillance system for bovine abortion. Preventive Veterinary Medicine, 8, 41-53.
  27. Weersink, A., VanLeeuwen, J. A., Chi, J. & Keefe, G. P. (2000). Direct production losses and treatment costs due to four dairy cattle diseases. Advanced Dairy Technology, 14, 55-75.