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Journals / Ankara Üniversitesi Veteriner Fakültesi Dergisi / 2007 / Cilt: 54 - Sayı: 3

Simmental x Güneydoğu Anadolu kırmızısı F XB melezi ineklerin buzağılama aralığı ve gebelik süresinin yaşam analizi ile incelenmesi

Survival analysis on calving interval and gestation length in Simmental x South Anatolian Red F XB crossbred cows

Aytaç AKÇAY
İsmail Safa GÜRCAN
Pages
219–222
Publication Date
2022-10-12
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The mean calving interval in young cow group is shorter than old cow group (p

📌 3 Key Takeaways

🎯
Objective & Hypothesis:The objective of this study was to compare the survival analysis for calving interval and gestation length in Simmental x South Anatolian Red crossbred F1XB1 cows.
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Key Findings & Data:The data set consisted of 1775 lactation records from January 1987 to October 1991, of which 3.10% were censored.
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Conclusion & Impact:The mean calving interval in young cow group is shorter than old cow group (p
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

The objective of this study was to compare the survival analysis for calving interval and gestation length in Simmental x South Anatolian Red crossbred F1XB1 cows. The data set consisted of 1775 lactation records from January 1987 to October 1991, of which 3.10% were censored. The mean calving interval was 382.26 days (15.39 S.D) for young cow group while it was 386.27 days (8.90 S.D) for old cow group. The mean calving interval in young cow group is shorter than old cow group (p

Özet

Bu çalışmada, Simmental x Güneydoğu Anadolu F1XB1 melezi genç ve ergin çağdaki ineklerde, buzağılama aralığı ve gebelik süreleri, yaşam analizi metodu ile incelenmiştir. Çalışmanın verileri, Ceylanpınar tarım işletmesinde Ocak 1987 ile Ekim 1999 tarihleri arasında yer alan 1775 laktasyon kayıdından elde edilmiştir. Verilerin %3.1’i sensörlüdür. Genç ineklerin ortalama buzağılama aralığının, (382.26 ± 15.39 Gün) ergin yaştakilerden (386.27 ± 8.9 Gün) daha kısa olduğu (p

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Cite This Article

AKÇAY, A., GÜRCAN, İ. S. (2022). Simmental x Güneydoğu Anadolu kırmızısı F XB melezi ineklerin buzağılama aralığı ve gebelik süresinin yaşam analizi ile incelenmesi. Ankara Üniversitesi Veteriner Fakültesi Dergisi, Cilt: 54 - Sayı: 3, 219–222. https://ajindex.com/articles/445150

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References (16)

  1. Boichard D (1990): Estimation of the economic value of conception rate in dairy cattle. Livestock Prod Sci, 24, 187 – 204
  2. Breslow NE (1970): A generalized Kruskal – Wallis test for comparing k samples subject to unequal patterns of censorship. Biometrika, 57, 579 – 594
  3. Brown CC (1983): The statistical comparison of relative survival rates. Biometrics, 39, 941 -948
  4. Buckley JD (1984): Additive and multiplicative models for relative survival rates. Biometrics, 40, 51 – 62
  5. Cox DR (1975): Partial likelihood. Biometrika, 62, 269 – 276
  6. Çilek S, Tekin ME (2005): Environmental factors affecting milk yield and fertility traits of Simmental cows raised at the Kozova state farm and phenotypic correlations between these traits. Turk J Vet Anim Sci, 29, 987-993
  7. Ducrocq V (1997): Survival analysis, a statistical tool for longevity data. 48 th. Annual Meeting of the EAAP, Vien, Austria
  8. Ducrocq V (1994): Statistical analysis of length of productive life for dairy cows of the Normande breed. J Dairy Sci, 77, 855-866
  9. Famula TR (1981): Exponential stayability model with censoring and covariates. J Dairy Sci, 64, 538
  10. Gehan EA (1965): A generalized Wilcoxon test for comparing arbitrarily singly censored samples. Biometrika, 52, 203 – 223
  11. Kaplan EL, Meier P (1958): Nonparametric estimation from incomplete observations. J Amer Stat Assoc, 53, 457 – 481
  12. Kumlu S, Akman N (1999): Türkiye damızlık siyah alaca sürülerinde süt ve döl verimi. Lalahan Hay Araşt Enst Derg, 39, 1-15
  13. Miller RG (1981): Survial Analysis. John Wiley and Sons, NY
  14. Smith SP (1983): The Extension of Failure Time Analysis to Problems of Animal Breeding. PhD Diss, Cornell Univ, Ithaca, NY
  15. Smith SP, Quass RL (1984): Productive lifespan of bull progeny groups: failure time analysis. J Dairy Sci, 67, 2999-3007
  16. SPSS ver. 11.5, Statistical Packet for Social Sciences, SN: 902 4147, Chicago, IL.