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The effect of climate index on growth values from birth to breeding in Akkaraman sheep

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Abstract

Under specific agroclimatic conditions, growth is an adaptability parameter resulting in reduced performance with decreasing animal comfort of a sheep breed. In this study, a total of 1011 lambs’ live weights (LW) and average daily weight gains (ADG) in 16 different farms between 2018 and 2020 (birth to 18 months) were determined in Akkaraman herds raised in Çankırı Province of Turkey. Comprehensive Climate Index (CCI) was examined to determine the effect of climate. Thermal comfort limits in CCI values were classified as CCI-1.cold (≤ 5 ℃), CCI-2.comfort (5–25 ℃), and CCI-3.warm (≥ 25 ℃). The climatic values that all lambs examined were exposed to according to index value groups in periods from birth to 18 months of age were prepared daily. The lambs were exposed to comfort environment in the majority of the days in the MP0–3 (77.7%) and MP12–18 (50.1%) periods. The lambs mostly in the MP3–6 period (72.2%) were above the warm stress threshold, but in the MP6–12 period, 54.7% were above the cold stress threshold. Overall mean LW of lambs at birth, at 3, 6, 12, and 18 months were 4.29 kg, 35.1 kg, 39.1 kg, 45.4 kg, and 52.6 kg, while the ADG values between birth–3 months, 3–6 months, 6–12 months, and 12–18 months were 341.8 g, 54.5 g, 42.9 g, and 56.8 g respectively. Periodically, CCI values were realized as 10–15, 25–30, and 18–22 in the growth periods of 0–3, 3–6, and 12–18 months, respectively, and ADG values of the lambs were found to be similar within their own periods. However, when the CCI values of the lambs increase to 5 and above in the 06–12-month period, there is a decrease in their live weight. As a result, climatic index values did not have a negative effect on the growth and development values of lambs in cold conditions in general, but warm conditions affected the animals negatively.

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Acknowledgements

The author kindly acknowledges the contribution of the General Directorate of Agricultural Research and Policies of the Republic of Turkey, which fund and run the “The National Small Ruminant Genetic Improvement Project in Farmer Condition.”

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  1. International Center for Livestock Research and Training, Ankara, Turkey

    Çağrı Melikşah SAKAR

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  1. Çağrı Melikşah SAKAR
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All stages (conceptualization, methodology, data collections, statistical analysis, and article writing) of the study were carried out by Çağrı Melikşah Sakar.

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Correspondence to Çağrı Melikşah SAKAR.

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This work did not involve the use of animals for laboratory studies. There is no violation of animal rights.

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For this study, Ethics Committee Certificate (26.03.2021–187) was obtained from the International Center for Livestock Research and Training.

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SAKAR, Ç. The effect of climate index on growth values from birth to breeding in Akkaraman sheep. Trop Anim Health Prod 56, 60 (2024). https://doi.org/10.1007/s11250-024-03901-7

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