Estimation of Parametric Single Index Ordered Logit Model on Milk Yields
Yıl: 2019 Cilt: 25 Sayı: 5 Sayfa Aralığı: 597 - 602 Metin Dili: İngilizce DOI: 10.9775/kvfd.2018.21335 İndeks Tarihi: 03-11-2020
Estimation of Parametric Single Index Ordered Logit Model on Milk Yields
Öz: This article aims to determine some important factors affecting the milk yield of Holstein Friesian cows and introduce the use of single indexordered logit model in milk yield studies. Considering the three-level ordered structure of the dependent variable of milk yield, a singleindex ordered logit model is applied to the data set. The data set used in this study is consisted of the 305-day milk records of the HolsteinFriesian cows that calved between 2001-2011 years. 14487 records, obtained from 1840 herds belonging to the members of Cattle BreedersAssociation in Isparta province, Turkey, are analyzed. The direct effects of the variables: parity, lactation length, first year of calving andcalving season on milk yield are investigated and comprehensive interpretations are presented. Results show that the cows having longerlactation lengths produce more milk than the cows having middle lactation lengths. The highest amount of milk yield is produced by thecows calving for the first time in their middle ages and in autumn season. The amount of milk obtained after a birth occurring in springseason is higher than the one reached after a birth in summer. Cow being on its 1st parity decreases the milk yield compared to the 6th parity.This result is consistent with the finding in literature in that cows reach their highest amount of milk on their 4th parities.
Anahtar Kelime: Süt Veriminde Parametrik Tek İndeks Sıralı Lojit Model Tahmini
Öz: Bu makale, Holstein Friesian ineklerinin süt verimini etkileyen bazı önemli faktörleri belirlemek ve süt verimi çalışmalarında tek indeks sıralı lojit modelin kullanımını tanıtmayı amaçlamaktadır. Süt verimi bağımlı değişkeninin üç düzeyli sıralı yapısını göz önünde bulundurarak, veri setine tek indeks sıralı lojit model uygulanmıştır. Bu çalışmada kullanılan veriler 2001-2011 yılları arasında buzağılayan Holstein Friesian ineklerinin 305 günlük süt kayıtlarından oluşmaktadır. Isparta ilinde bulunan Sığır Yetiştiricileri Birliği üyelerine ait 1840 sürüden elde edilen 14487 kayıt analiz edilmiştir. Parite, laktasyon süresi, ilk buzağılama yılı ve buzağılama mevsimi değişkenlerinin süt verimi üzerindeki doğrudan etkileri araştırılmış ve sonuçların ayrıntılı yorumlarına yer verilmiştir. Sonuçlar daha uzun laktasyon süresine sahip olan ineklerin, orta laktasyon süresine sahip olan ineklerden daha fazla süt ürettiğini göstermektedir. Orta yaşlarında ve sonbahar mevsiminde ilk kez buzağılayan inekler en yüksek düzeyde süt üretmektedir. İlkbahar mevsiminde meydana gelen bir doğumdan sonra elde edilen süt miktarı, yazın doğumdan sonra ulaşılan miktardan daha yüksektir. Birinci paritesindeki ineklerin süt verimi 6. pariteye göre azalır. Bu sonuç, ineklerdeki en yüksek süt miktarının 4. paritede elde edildiği yönündeki literatürde yer alan bulguyla tutarlıdır..
Anahtar Kelime: Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık
- 1. İşçi Güneri Ö, Takma Ç, Akbaş Y: Siyah alaca sığırlarda 305 günlük süt verimini etkileyen faktörlerin Path (İz) analizi ile belirlenmesi. Kafkas Univ Vet Fak Derg, 21 (2): 219-224, 2015. DOI: 10.9775/kvfd.2014.12054
- 2. Aytekin İ, Mammadova NM, Altay Y, Topuz D, Keskin İ: Determination of factors affecting lactation milk yield of Holstein Friesian cows by path analysis. Selcuk J Agr Food Sci, 30 (1): 44-48, 2016.
- 3. Ristevski M, Toholj B, Cincovi M, Bobos S, Trojacanec P, Stevancevic M, Ozren S: Influence of body condition score and ultrasound-determined thickness of body fat deposit in Holstein-Friesians cows on the risk of lameness developing. Kafkas Univ Vet Fak Derg, 23 (1): 69-75, 2017. DOI: 10.9775/kvfd.2016.15851
- 4. Öner Y, Yılmaz O, Okut H, Ata N, Yılmazbaş Mecitoğlu G, Keskin A: Association between GH, PRL, STAT5A, OPN, PIT-1, LEP and FGF2 polymorphisms and fertility in Holstein-Friesians Heifers. Kafkas Univ Vet Fak Derg, 23 (4): 527-534, 2017. DOI: 10.9775/kvfd.2016.17192
- 5. Solano L, Barkema HW, Pajor EA, Mason S, LeBlanc SJ, Nash CGR, Haley DB, Pellerin D, Rushen J, de Passille AM, Vasseur E, Orsel K: Association between lying behavior and lameness in Canadian Holstein- Friesian cows housed in freestall barns. J Dairy Sci, 99 (3): 2086-2101, 2016. DOI: 10.3168/jds.2015-10336
- 6. Koçak Ö, Ekiz B: Studies on factors affecting the milk yield and lactation curve of Holstein cows in intensive conditions. J Fac Vet Med Istanbul Univ, 32 (2): 61-69, 2006.
- 7. Tahtalı Y, Şahin A, Ulutaş Z, Şirin E, Abacı SH: Esmer ırkı sığırlarda süt verimi üzerine etkili faktörlerin Path analizi ile belirlenmesi. Kafkas Univ Vet Fak Derg, 17 (5): 859-864, 2011. DOI: 10.9775/kvfd.2011.4688
- 8. Verma MK, Sachdeva GK, Yadav AK, Gautam S, Ali MM, Kumar S: Effect of genetic and non-genetic factors on milk yield and milk constituents in Murrah buffalo. Indian J Anim Res, 51 (2): 387-390, 2017. DOI: 10.18805/ ijar.9297
- 9. Akkuş Ö, Özkoç H: A comparison of the models over the data on the interest level in politics in Turkey and countries that are members of the European Union: Multinomial or ordered logit model? Res J Appl Sci Eng Technol, 4 (19): 3646-3657, 2012.
- 10. Farin PW, Slenning BD, Correa MT, Britt JH: Effects of calving season and milk yield on pregnancy risk and income in North Carolina Holstein cows. J Dairy Sci, 77, 1848-1855, 1994. DOI: 10.3168/jds.S0022-0302(94)77126-5
- 11. Tabachnick BG, Fidell LS: Using multivariate analysis. 4th ed., Allyn and Bacon Publishers, Boston, 2001.
- 12. Liao TF: Interpreting probability models (Logit, probit and other generalized linear models). Sage Publications, Thousand Oaks, California, 1994.
- 13. Greene WH: Econometric analysis. New York University, Prentice Hall, Upper Saddle River, New Jersey, 2000.
- 14. Powers DA, Xie Y: Statistical methods for categorical data analysis, Emerald Publishing Group, UK, 2000.
- 15. Borooah VK: Logit and probit (Ordered and multinomial models). Sage Publications, Thousand Oaks, California, 2002.
- 16. Akkuş Ö, Özkoç H: STATA Uygulamaları Ile Nitel Veri Analizi. Seçkin Yayınları, Ankara, 2018.
- 17. Vijayakumar M, Park JH, Ki KS, Lim DH, Kim SB, Park SM, Jeong HY, Park BY, Kim TI: The effect of lactation number, stage, length, and milking frequency on milk yield in Korean Holstein dairy cows using automatic milking system. Asian Australas J Anim Sci, 30 (8): 1093-1098, 2017. DOI: 10.5713/ajas.16.0882
- 18. Lateef M, Gondal KZ, Younas M, Sarwar M, Mustafa MI, Bashir MK: Milk production potential of pure bred Holstein Friesian and Jersey cows in subtropical environment of Pakistan. Pak Vet J, 28 (1): 9-12, 2008.
- 19. Eastham NT, Coates A, Cripps P, Richardson H, Smith R, Oikonomou G: Associations between age at first calving and subsequent lactation performance in UK Holstein and Holstein-Friesian dairy cows, PLoS One, 13 (6): e0197764, 2018. DOI: 10.1371/journal.pone.0197764
- 20. M’hamdi N, Mahdi B, Frouja S, Ressaissi Y, Brar SK, Hamouda MB: Effects of environmental factors on milk yield, lactation length and dry period in Tunisian Holstein cows. In, Chaiyabutr N (Ed): Milk Production: An Up-to-Date Overview of Animal Nutrition, Management and Health. 289- 308, IntechOpen, London, 2012.
- 21. Nalubwama S, Kabi F, Vaarst M, Smolders G, Kiggundu M: Cattle management practices and milk production on mixed smallholder organic pineapple farms in Central Uganda. Trop Anim Health Prod, 48 (8): 1525-1532, 2016. DOI: 10.1007/s11250-016-1123-5
| APA | Akkuş Ö, Sevinç V, TAKMA Ç, ISÇI GÜNERI O (2019). Estimation of Parametric Single Index Ordered Logit Model on Milk Yields. , 597 - 602. 10.9775/kvfd.2018.21335 |
| Chicago | Akkuş Özge,Sevinç Volkan,TAKMA Çiğdem,ISÇI GÜNERI OZNUR Estimation of Parametric Single Index Ordered Logit Model on Milk Yields. (2019): 597 - 602. 10.9775/kvfd.2018.21335 |
| MLA | Akkuş Özge,Sevinç Volkan,TAKMA Çiğdem,ISÇI GÜNERI OZNUR Estimation of Parametric Single Index Ordered Logit Model on Milk Yields. , 2019, ss.597 - 602. 10.9775/kvfd.2018.21335 |
| AMA | Akkuş Ö,Sevinç V,TAKMA Ç,ISÇI GÜNERI O Estimation of Parametric Single Index Ordered Logit Model on Milk Yields. . 2019; 597 - 602. 10.9775/kvfd.2018.21335 |
| Vancouver | Akkuş Ö,Sevinç V,TAKMA Ç,ISÇI GÜNERI O Estimation of Parametric Single Index Ordered Logit Model on Milk Yields. . 2019; 597 - 602. 10.9775/kvfd.2018.21335 |
| IEEE | Akkuş Ö,Sevinç V,TAKMA Ç,ISÇI GÜNERI O "Estimation of Parametric Single Index Ordered Logit Model on Milk Yields." , ss.597 - 602, 2019. 10.9775/kvfd.2018.21335 |
| ISNAD | Akkuş, Özge vd. "Estimation of Parametric Single Index Ordered Logit Model on Milk Yields". (2019), 597-602. https://doi.org/10.9775/kvfd.2018.21335 |
| APA | Akkuş Ö, Sevinç V, TAKMA Ç, ISÇI GÜNERI O (2019). Estimation of Parametric Single Index Ordered Logit Model on Milk Yields. Kafkas Üniversitesi Veteriner Fakültesi Dergisi, 25(5), 597 - 602. 10.9775/kvfd.2018.21335 |
| Chicago | Akkuş Özge,Sevinç Volkan,TAKMA Çiğdem,ISÇI GÜNERI OZNUR Estimation of Parametric Single Index Ordered Logit Model on Milk Yields. Kafkas Üniversitesi Veteriner Fakültesi Dergisi 25, no.5 (2019): 597 - 602. 10.9775/kvfd.2018.21335 |
| MLA | Akkuş Özge,Sevinç Volkan,TAKMA Çiğdem,ISÇI GÜNERI OZNUR Estimation of Parametric Single Index Ordered Logit Model on Milk Yields. Kafkas Üniversitesi Veteriner Fakültesi Dergisi, vol.25, no.5, 2019, ss.597 - 602. 10.9775/kvfd.2018.21335 |
| AMA | Akkuş Ö,Sevinç V,TAKMA Ç,ISÇI GÜNERI O Estimation of Parametric Single Index Ordered Logit Model on Milk Yields. Kafkas Üniversitesi Veteriner Fakültesi Dergisi. 2019; 25(5): 597 - 602. 10.9775/kvfd.2018.21335 |
| Vancouver | Akkuş Ö,Sevinç V,TAKMA Ç,ISÇI GÜNERI O Estimation of Parametric Single Index Ordered Logit Model on Milk Yields. Kafkas Üniversitesi Veteriner Fakültesi Dergisi. 2019; 25(5): 597 - 602. 10.9775/kvfd.2018.21335 |
| IEEE | Akkuş Ö,Sevinç V,TAKMA Ç,ISÇI GÜNERI O "Estimation of Parametric Single Index Ordered Logit Model on Milk Yields." Kafkas Üniversitesi Veteriner Fakültesi Dergisi, 25, ss.597 - 602, 2019. 10.9775/kvfd.2018.21335 |
| ISNAD | Akkuş, Özge vd. "Estimation of Parametric Single Index Ordered Logit Model on Milk Yields". Kafkas Üniversitesi Veteriner Fakültesi Dergisi 25/5 (2019), 597-602. https://doi.org/10.9775/kvfd.2018.21335 |
