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    Öğe
    Besi süresinin ivesi erkek kuzuların besi performansı ve karkas özelliklerine etkisi
    (2007) Tekel, Nihat; Vural, Mehmet Emin; Şireli, Halit Deniz
    Öz: Bu çalısma Diyarbakır’da bulunan Güneydogu Anadolu Tarımsal Arastırma Enstitüsü koyunculuk isletmesinde 2005 yılında gerçeklestirilmistir. Arastırmada 2005 yılında dogan ve farklı sürelerde besiye tabi tutulan vesi erkek kuzuların besi performansı ile kesim ve karkas özelliklerinin belirlenmesi amaçlanmıstır. Deneme kuzularına sütten kesime kadar analarından ayrılmadan yem verilmis ve 2 aylık yasta sütten kesilmislerdir. Her birinde 15, 16 ve 14 bas erkek kuzu bulunan gruplara sırasıyla 60 (BS60), 75 (BS75) ve 91(BS91) günlük entansif besi uygulanmıstır. Besi gruplarının besi sonu canlı agırlık ortalamaları sırasıyla; 36.07±1.64, 39.07±1.13 ve 42.11± 1.50 kg olarak tespit edilmis ve BS60 grubu ile BS91 grubunun besi sonu canlı agırlık ortalamaları arasındaki fark önemli (P < 0.05) bulunmustur. Gruplarda karkas randımanı yukarıdaki sırayla; % 47.41±0.677, 51.63±0.869 ve 50.13±0.294 olarak tespit edilmistir. Grupların günlük ortalama canlı agırlık artısı sırasıyla; 0.26±0.018 0.24±0.007 ve 0.22± 0.016 kg ve 1 kg canlı agırlık artısı için tüketilen konsantre yem miktarı (yem degerlendirme sayısı) ise 5.410, 5.635 ve 6.160 kg olmustur
  • Küçük Resim
    Öğe
    Birth and weaning weights of Awassi lambs raised in the GAP International Agricultural Research and Training Center
    (Ankara Üniversitesi Veteriner Fakültesi, 2015) Şireli, Halit Deniz; Vural, Mehmet Emin; Karataş, Ahmet; Akça, Nalan; Koncagül, Seyrani; Tekel, Nihat
    In this study, the data were collected from 1271 heads of Awassi lambs raised in the GAP InternationalAgricultural Research and Training Center in Diyarbakır, Turkey. Birth and weaning weight (at 90 days) of lambs were measur edand average daily weight gain from birth to weaning was calculated. The effect of the years and season of lambing, age of dam, sexand birth type on birth weight (BWT), weaning weight (WWT) and average daily weight gain (ADWG) from birth to weaning were investigated. Overall means were 4.81±0.022 kg for BWT, 22.99±0.196 kg for WWT and 201.67±1.173 g for ADWG. The all taritsin the analyses were significantly (P<0.05) affected by all factors in the model. In addition, lambs born heavier grew faster andreached heavier WWT (p<0.01). Based on the single and multiple trait analyses, heritability estimates ranged from 0.21 to 0.25 forBWT, from 0.13 to 0.17 for WWT and from 0.13 to 0.17 for ADWG. Estimates of genetic correlations between BWT with WWTand ADWG were 0.61 and 0.61, respectively.
  • Küçük Resim
    Öğe
    Comparison of different lactation curve models to describe lactation curve in Awassi sheep raised in Turkey
    (Corvinus University of Budapest, 2019) Tekel, Nihat; Şireli, Halit Deniz; Karataş, Ahmet; Vural, Mehmet Emin; Koncagul, S.; Tutkun, Muhittin
    The study was carried out in the International GAP Agricultural Research and Training Centre (GATEA) between the years 2010-2014 in Diyarbakır, Turkey. The aims of this study were 1) to compare 8 different models (MG, Dhanoa, Nelder, Wood, CLD, and 2nd-, 3rd-and 4th-degree polynomial) used to describe the lactation curve for Awassi sheep by using 557 completed lactation milk yield records, and 2) to identify the suitable model. In addition, the most effects of birth season, parity, and birth type on the lactation milk yield and parameters on the identified model were investigated. As a result of this study, it was determined that the 4th-degree polynomial (POL4) model is the most suitable. In addition, it was found that all the factors, excluding birth type, have significant effects on the model parameters and lactation milk yield (P < 0.05). © 2019, ALÖKI Kft., Budapest, Hungary.