Estimation of live weights at the beginning and the end of grazing season in Tuj lambs via scores of factor analysis
Yıl: 2018 Cilt: 65 Sayı: 3 Sayfa Aralığı: 261 - 266 Metin Dili: İngilizce DOI: 10.1501/Vetfak_0000002855 İndeks Tarihi: 20-10-2018
Estimation of live weights at the beginning and the end of grazing season in Tuj lambs via scores of factor analysis
Öz: This study was conducted in order to eliminate multicollinearity between body measurements of Tuj lambs and to estimate their live weights in the beginning and the end of grazing season (GS) using factor analysis scores, which were determined by calculating some body measurements, in multiple regression model. For this purpose, the material of the study consisted of 297 Tuj lambs born between 2009 and 2013. Live weights (LW) of lambs in the beginning and at the end of GS and body length (BL), withers height (WH), chest girth (CG), chest depth (CD), circumferences of cannon forelimb (CCF) and circumferences cannon hindlimb (CCH) measurements were analyzed in the study. Factor analysis were used to determine the estimated equation between the characteristics. It was determined that there was a multicollinearity between, CCF and CCH measured at the beginning of GS. Problem of multicollinearity between independent variables was eliminated by using factor scores (FS) determined by factor analysis in multiple regression models. Consequently, two factors were detected from results of factor analysis applied to body measurements to determine live weights of Tuj lambs in the beginning and at the end of GS. These factors for LW in the beginning and at the end of GS were found to explain 84.8% and 78.9% of total variance, respectively. Thereby, it was revealed that more accurate estimations could be made by using factor analysis scores in estimating live weights of Tuj lambs at the beginning and the end of GS. In addition, it was concluded that applying factor analysis scores derived from independent variables decreased mistake in the model according to least squares method.
Anahtar Kelime: Konular:
Tuj kuzularında mera sezonu başlangıcı ve sezon sonu canlı ağırlıklarının faktör analizi skorları ile tahmin edilmesi
Öz: Bu araştırma Tuj kuzularında vücut ölçüleri arasındaki çoklu bağlantıyı elimine etmek ve bazı vücut ölçülerinin hesaplanmasıyla belirlenen faktör analizi skorlarını, çoklu regresyon modelinde kullanarak, mera sezonu başı ve sezon sonu canlı ağırlıklarını tahmin etmek amacıyla yapılmıştır. Bu amaçla, araştırmanın materyalini 2009-2013 yılları arasında doğan 297 Tuj ırkı kuzu oluşturmuştur. Araştırmada kuzuların mera başı ve mera sonu döneminde alınan canlı ağırlıkları ile vücut uzunluğu, cidago yüksekliği, göğüs çevresi, göğüs derinliği, ön incik çevresi ve arka incik çevresi ölçülerinden yararlanılmıştır. Özellikler arasındaki tahmini denklemi belirlemek için faktör analizi skorlarından yararlanılmıştır. Mera sezonu başı döneminde ölçülen ön incik çevresi ve arka incik çevresi arasında çoklu bağlantının olduğu belirlenmiştir. Çoklu regresyon modelinde faktör analizi ile belirlenen faktör skorlarının kullanılması ile bağımsız değişkenler arasındaki çoklu bağlantı probleminin giderildiği tespit edilmiştir. Sonuç olarak Tuj kuzularında mera sezonu başı ve mera sezonu sonundaki canlı ağırlıklarını belirlemek için vücut ölçülerine uygulanan faktör analizi sonuçlarında iki faktör tespit edilmiştir. Sezon başı ve sonundaki bu faktörler, toplam varyansın sırasıyla %84.8'ini ve %78.9'unu belirlemiştir. Böylelikle Tuj kuzularının mera sezonu başı ve sezon sonu dönemindeki canlı ağırlıklarının tahmininde faktör analizi skorlarının uygulanmasının modeldeki yanılgıyı daha doğru olarak ortaya çıkarmıştır. Ayrıca bağımsız değişkenlerden üretilen faktör analizi skorlarının uygulanması sonucunda modeldeki yanılgıyı en küçük kareler yöntemine göre azalttığı kanaatine varılmıştır.
Anahtar Kelime: Konular:
Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık
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APA | ÖNK K, SARI M, GURCAN I (2018). Estimation of live weights at the beginning and the end of grazing season in Tuj lambs via scores of factor analysis. , 261 - 266. 10.1501/Vetfak_0000002855 |
Chicago | ÖNK KADİR,SARI MEHMET,GURCAN Ismayil SAFA Estimation of live weights at the beginning and the end of grazing season in Tuj lambs via scores of factor analysis. (2018): 261 - 266. 10.1501/Vetfak_0000002855 |
MLA | ÖNK KADİR,SARI MEHMET,GURCAN Ismayil SAFA Estimation of live weights at the beginning and the end of grazing season in Tuj lambs via scores of factor analysis. , 2018, ss.261 - 266. 10.1501/Vetfak_0000002855 |
AMA | ÖNK K,SARI M,GURCAN I Estimation of live weights at the beginning and the end of grazing season in Tuj lambs via scores of factor analysis. . 2018; 261 - 266. 10.1501/Vetfak_0000002855 |
Vancouver | ÖNK K,SARI M,GURCAN I Estimation of live weights at the beginning and the end of grazing season in Tuj lambs via scores of factor analysis. . 2018; 261 - 266. 10.1501/Vetfak_0000002855 |
IEEE | ÖNK K,SARI M,GURCAN I "Estimation of live weights at the beginning and the end of grazing season in Tuj lambs via scores of factor analysis." , ss.261 - 266, 2018. 10.1501/Vetfak_0000002855 |
ISNAD | ÖNK, KADİR vd. "Estimation of live weights at the beginning and the end of grazing season in Tuj lambs via scores of factor analysis". (2018), 261-266. https://doi.org/10.1501/Vetfak_0000002855 |
APA | ÖNK K, SARI M, GURCAN I (2018). Estimation of live weights at the beginning and the end of grazing season in Tuj lambs via scores of factor analysis. Ankara Üniversitesi Veteriner Fakültesi Dergisi, 65(3), 261 - 266. 10.1501/Vetfak_0000002855 |
Chicago | ÖNK KADİR,SARI MEHMET,GURCAN Ismayil SAFA Estimation of live weights at the beginning and the end of grazing season in Tuj lambs via scores of factor analysis. Ankara Üniversitesi Veteriner Fakültesi Dergisi 65, no.3 (2018): 261 - 266. 10.1501/Vetfak_0000002855 |
MLA | ÖNK KADİR,SARI MEHMET,GURCAN Ismayil SAFA Estimation of live weights at the beginning and the end of grazing season in Tuj lambs via scores of factor analysis. Ankara Üniversitesi Veteriner Fakültesi Dergisi, vol.65, no.3, 2018, ss.261 - 266. 10.1501/Vetfak_0000002855 |
AMA | ÖNK K,SARI M,GURCAN I Estimation of live weights at the beginning and the end of grazing season in Tuj lambs via scores of factor analysis. Ankara Üniversitesi Veteriner Fakültesi Dergisi. 2018; 65(3): 261 - 266. 10.1501/Vetfak_0000002855 |
Vancouver | ÖNK K,SARI M,GURCAN I Estimation of live weights at the beginning and the end of grazing season in Tuj lambs via scores of factor analysis. Ankara Üniversitesi Veteriner Fakültesi Dergisi. 2018; 65(3): 261 - 266. 10.1501/Vetfak_0000002855 |
IEEE | ÖNK K,SARI M,GURCAN I "Estimation of live weights at the beginning and the end of grazing season in Tuj lambs via scores of factor analysis." Ankara Üniversitesi Veteriner Fakültesi Dergisi, 65, ss.261 - 266, 2018. 10.1501/Vetfak_0000002855 |
ISNAD | ÖNK, KADİR vd. "Estimation of live weights at the beginning and the end of grazing season in Tuj lambs via scores of factor analysis". Ankara Üniversitesi Veteriner Fakültesi Dergisi 65/3 (2018), 261-266. https://doi.org/10.1501/Vetfak_0000002855 |