アルジェリアの乳牛群の繁殖能力に対する気候変動の課題
Aziza Ferag1, Djalel Eddine Gherissi2, Tarek Khenenou1
1Institute of Agricultural and Veterinary Sciences, Deprtement of Veterinary Sciences, University of Souk-Ahras, 41000, Algeria.
Journal of thermal biology
|February 15, 2026
まとめ
アルジェリアでは,気候変動が乳牛の生育率に悪影響を及ぼし,熱ストレス (THI >72) が受精率を大幅に低下させている. 地元の品種と乾燥地域は,環境上の課題にもかかわらず,より良い生殖能力を示しました.
科学分野:
- 動物科学 動物科学
- 生殖生物学 生殖生物学
- 環境科学 環境科学
背景:
- 地中海,特にアルジェリアの気候の変化は,家畜に影響を及ぼします.
- 乳牛の生育能力は,農業経済にとって極めて重要です.
- 熱ストレスは,動物の繁殖に対する懸念が高まっています.
研究 の 目的:
- アルジェリアの乳牛の生殖パラメータに対する環境要因 (温度-湿度指数,地域,品種) の影響を評価する.
- 熱ストレスが受胎率と生育率に与える影響を評価する.
- アルジェリアの牛の生殖能力に影響を与える要因を特定する.
主な方法:
- 2016年から2021年までの24657頭の牛の40956件の人工授精 (AI) の分析.
- 妊娠率 (CR1stAI,CR2ndAI),妊娠率全体 (OCR),生育率 (AFI),生殖期 (RP) の統計評価について
- 温度-湿度指数 (THI) と生殖パラメータの相関分析.
主要な成果:
- アルジェリアの乳牛の生育率は低く,COVID-19によって悪化しています.
- 熱ストレス (THI >72) は,受精率低下 (P < 0.000) と著しく相関しています.
- 乾燥地域と地元の品種は,優れた生殖能力を示し,THI>80はOCRとCR1stAIの確率を下げました.
結論:
- アルジェリアの気候条件,特に熱ストレスが,アルジェリアの乳牛の生育能力に悪影響を及ぼしています.
- 熱ストレスを軽減する戦略の実施は,生殖結果を改善するために不可欠です.
- 乳牛の健康に重点を置くことは,生育不全の課題を克服するための鍵です.
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