Least Squares, Simple Linear Regression, and Pearson Correlation Analysis between the Lactation Milk Yield of Norduz Ewes and Their Lambs’ Live Weight

Yıl 2024, Cilt: 34 Sayı: 3, 381 - 392, 30.09.2024

Hasan Çelikyürek , Turgut Aygün

https://doi.org/10.29133/yyutbd.1463028

Öz

This study aimed to determine the lactation milk yield of Norduz ewes and to determine the effects of milk yield on their lambs’ growth and development characteristics. Additionally, the correlations between the sheep’s milk yield, lambs’ live weight, and affecting factors were determined. The study was conducted at the Van University of Yüzüncü Yıl Agricultural Research Center. In the study, 61 Norduz ewes and 66 male and female lambs they bore were included. The sheep were milked at 30-day intervals until the 180th day. Similarly, the lambs were weighed at 30-day intervals from birth to 180th day. The means and standard errors of the milk yields were obtained on the 30, 60, 90, 120, 150th, and 180th days of milking. The live weight means and standard errors of the lambs on the 30th, 60th, 90th, 120th, 150th, and 180th days are given. According to the GLM analysis results, sex significantly influenced lactation length (p<0.05), and there was a difference in favor of female lambs. The impact of dam age was notably significant on live weight at days 60 and 90 (p<0.05). Additionally, birth type significantly affected live weight at day 30 and 60 (p<0.001), as well as at day 90 (p<0.01). Regarding the linear relationship between dam weight and live weight, a significant effect was observed at day 30 (p<0.001), day 60 (p<0.01), and day 90 (p<0.05). Notably, the linear effects of lamb birth weight on live weight remained significant across all control periods (p<0.001).

Anahtar Kelimeler

Norduz sheep, Growth, Lactation milk yield, Live weight, Correlation

Etik Beyan

With the number E-44762815-325.04.02[325.04.02]-3175480, with the permission of the Republic of Türkiye Ministry of Agriculture and Forestry, Van Directorate of Provincial Agriculture and Forestry, permission was given that it is within the scope of a study that does not require an ethics committee and therefore there is no harm in conducting the study.

Destekleyen Kurum

Department of Scientific Research Projects of Van Yüzüncü Yıl University

Proje Numarası

FYD-2020-8935

Teşekkür

I would like to thank the Department of Scientific Research Projects of Van Yüzüncü Yıl University for financially supporting this research under project number FYD-2020-8935.

Kaynakça

• Alarslan, E., & Aygün, T. (2019). Determination of some milk yield and reproduction characteristics of Kıvırcık sheep in Yalova. Black Sea Journal of Agriculture, 2 (2), 86-92.
• Altın, T. (2001). Variation of Milk Yield in Sheep During Lactation Period and Estimation of Lactation Milk Yield by Means of Different Methods. Yüzüncü Yıl University Journal of Agricultural Sciences, 11(2), 1-7.
• Altın, T., & Çelikyürek, H. (1996). The Effect of Lambs Grown with Residue Milk on Milk Production of Sheep. Yüzüncü Yıl University, Ziraat Fakültesi Dergisi, 6(1), 173-184.
• Altın, T., Karaca, O., & Cemal, İ. (2003). The Effect of Weaning Age on Growth of Lambs and Milk Production of Dam. Yuzuncu Yıl University Journal of Agricultural Sciences, 13(2), 103-111.
• Anonymous. (2022a). Küçükbaş hayvan ırk tescil formatı - Resmi Gazete. https://www.resmigazete.gov.tr/eskiler/2004/12/EK-14%20Norduz%20Koyunu.doc. Access date: 26.02.2022.
• Anonymous. (2022b). Norduz koyunu. https://van.tarimorman.gov.tr/Sayfalar/Detay.aspx?SayfaId=24. Access date: 26.02.2022.
• Aşkan, R., & Aygün, T. (2020). Determination of Milk Yield Traits and Some Components of Milk in Akkaraman Crossbred Ewes Maintained at Rural Conditions, Journal of Animal Production, 61(1), 23-31, https://doi.org/10.29185/hayuretim.683693
• Bayar, O.O. (2015). Milk Yield of Karya Ewes and Its Effects on Lamb Growth Characteristics at Rural Farms. (Master Thesis) Adnan Menderes University, Department of Animal Sciences, 2015-Yl-053
• Berger, Y. M., & Thomas, D. L. (2013). Milk testing, calculation of milk production and adjustment factors. Pp: 55–63. Proc. of 10th Great Lakes Dairy Sheep Symp., Hudson, WI, USA.
• Bingöl, E., & Aygün, T. (2014). The Growth and Developing Traits of Karakaş Ewes in Hakkari. Iğdır University Journal of the Institute of Science and Technology, 4(3), 65-73.
• Bingöl, E., & Bingöl, M. (2015). The Growth of Lambs and Body Measurement Traits of Hamdani Ewes, Yuzuncu Yil University Journal of Agricultural Sciences, 25(2), 200-206.
• Bingöl, M. (1998). Reproductive and milk yield with growth - development and morphological traits of Norduz sheep (PhD Thesis). Van Yüzüncü Yıl Üniversitesi, Fen Bilimleri Enstitüsü.
• Bingöl, M., Gökdal, Ö., & Yücel, A. (2007). Growth of Norduz Lambs in Rural Farm Conditions. V. Ulusal Zootekni Bilim Kongresi, Van, Türkiye, 5-08 September 2007, 24.
• Ceyhan, A., Erdoğan, İ., & Sezenler, T. (2007). Some Production Characteristics of Kıvırcık, Gokceada and Sakız Breeds of Sheep Conserved as Gene Resources. Journal of Tekirdag Agricultural Faculty, 4(2), 211-218.
• Çelikyürek, H. (1996). The Effect of growth with residual milk on grown traits of lambs, (Master Thesis) Van Yüzüncü Yıl University, Institute of Science and Technology. Van
• Çelikyürek, H. (2022). Growth-development characteristics and affecting factors in Norduz lambs. Tropical Animal Health and Production. 54, 188. https://doi.org/10.1007/s11250-022-03190-y
• Çelikyürek, H. (2023). The Effect of Environmental Factors on Testicular and Body Measurements of Norduz Lambs. Pakistan Journal of Zoology, 55(1), 69-75. https://doi.org/10.17582/journal.pjz/20200623080607
• Daşkıran, İ., Koncagül, S., & Bingöl, M. (2010). Growth characteristics of indigenous Norduz female and male lambs. Tarim Bilimleri Dergisi, 16(1), 62–69. https://doi.org/10.1501/tarimbil_0000001122
• Demirel, M., Kurbal, O. F., Aygun, T., Erdogan, S., Bakici, Y., Yılmaz, A., & Ulker, H. (2004). Effects of different feeding levels during mating period on the reproductive performance of Norduz ewes and growth and survival rate of their lambs. Journal of Biological Sciences, 4(3), 283–287.
• Esen, F., & Özbey, O. (2002). Fertility and Milk Yield Characteristics in White Karaman and Chios x White Karaman (F1) Crossbred Sheep. Turkish Journal Veterinary Animal Science, 26, 503-509.
• Eyduran, E., Karakus, K., Karakuş, S., & Cengiz, F. (2009). Usage of factor scores for determining relationships among body weight and some body measurements. Bulgarian Journal of Agricultural Science, 15, 373-377.
• Gürsu, G., & Aygün, T. (2014). Some characteristics of milk yield in Awassi ewes maintained at village conditions. Journal of Advanced Agricultural Technologies, 1, 19-23.
• Karaca, O., Kaygısız, A., Altın, T., & Söğüt, B. (1990). İvesi x Akkaraman melezi kuzularının kimi gelişme özellikleri. YYÜ, Ziraat Fakültesi Dergisi, 1(1), 137-145.
• Karakuş, K., Eyduran, E., Aygun, T., & Cengiz, F. (2009). Factors affecting the growth of norduz lambs. Indian Veterinary Journal, 86(6), 606–608.
• Kaymakçı, M. (2013). İleri Koyun Yetiştiriciliği (Dördüncü Baskı). Bornova, Izmir.
• Kaymakçı, M., Koşum, N., & Taşkın, T. (2002). Type Fixation at Sönmez Sheep (2. Some Body Measurements and Milk Yield Traits). Journal of Agriculture Faculty of Ege University, 39(2), 95-101.
• Koncagül, S., Daşkıran, İ., & Bingöl, M. (2012). Factors Affecting Lactation Milk Yield and Lactation Curve of Norduz Sheep in Farmer Condition. Journal of the Faculty of Veterinary Medicine, 18(4), 677–684. https://doi.org/10.9775/kvfd.2012.6296
• Kum, D., Karakuş, K., & Özdemir, T. (2010). The Best Non-Linear Function for Body Weight at Early Phase of Norduz Female Lambs. Trakia J Sciences, 8(2), 62-67
• Ocak, E. (2009). The milk yield and milk components of Norduz sheep is breeding in Van. Yüzüncü Yıl University Journal of Agricultural Sciences, 19(2), 85–89.
• R. (2023). The R Foundation for Statistical Computing (Version 4.2.3). The R Copyright (C) 2023.
• Sarı, M., Işık, M., Önk, K., Aksoy, A.R., & Tilki, M. (2013). Growth characteristics and some body measurements of Tuj lambs. Erciyes Üniversitesi Veteriner Fakültesi Dergisi, 10(3), 149-155.
• SAS. (2023). SAS/Stat Software Hangen and Enhanced (2020). SAS Institute Incorporation.
• Şahin, E. H., & Akmaz, A. (2004). MUk Yield Charactertstlcs and Control in Sheep. Eurasian Journal of Veterinary Sciences, 20(1), 5–11.
• Yıldız, G., Soysal, M. İ. & Gürcan, E. K. (2009). Determination of Growth Curve with Different Model in the Karacabey Merinos x Kıvırcık Crossbred Lambs Raised in Tekirdağ Provinces, Journal of Tekirdag Agricultural Faculty, 6(1), 11-19.
• Yılmaz, A., Karakuş, F., Bingöl, M., Kaki, B., & Ser, G. (2018). Effects of some factors on growth of lambs and the determination of growth curve models. Indian Journal of Animal Research, 52(9), 1257–1262. https://doi.org/10.18805/ijar.B-815
• Yılmaz, A., Karakuş, F., Bingöl, M., Kaki, B., & Ser, G. (2017). Effects of some factors on growth of lambs and the determination of growth curve models. Indian J. Anim. Res., 52, 1257-1262.
• Yılmaz, O., Denk, H., & Bayram, D. (2007). Effects of lambing season, sex and birth type on growth performance in Norduz lambs. Small Ruminant Research, 68(3), 336–339. https://doi.org/10.1016/j.smallrumres.2005.11.013
• Yılmaz, O., Denk, H., & Nursoy, H. (2004). Milk yield characteristics of Norduz sheep. Yüzüncü Yıl Üniversitesi Veteriner Fakültesi Dergisi, 15(1–2), 27–31.