ウシの妊娠末期における夜間給餌が血漿中プロスタグランジンE_2およびコルチゾール濃度に及ぼす影響 Effect of Night-Time Feeding on Plasma Prostaglandin E_2 and Cortisol Concentrations on Teminal Stage of Pregnancy in Cow

この論文にアクセスする

この論文をさがす

著者

抄録

夜間給餌による昼間分娩のメカニズムを解明する試みとして,分娩の発来とプロスタグランジンE<sub>2</sub>(PGE<sub>2</sub>)およびコルチゾールとの関連性について検討した.妊娠末期のホルスタイン種雌牛を夜間給餌群と通常給餌群に区分した.昼夜のPGE<sub>2</sub>とコルチゾールの変化を観察するため,朝タの1日2回の血液採取を行った.通常給餌群での昼間分娩率は51.9%,夜間給餌群での昼間分娩率は64.3%であった.夜間給餌群では分娩前後で特異的に夕方の血漿中PGE<sub>2</sub>濃度が増加せず,PGE<sub>2</sub>とコルチゾールの濃度が夕方より朝の方が高値を示したものが昼間分娩する傾向にあった.また,分娩前後の血漿中PGE<sub>2</sub>濃度の変化は,血漿中コルチゾール濃度と密接な関係を示した.以上のことから,夜間給餌による夕方の血漿中PGE<sub>2</sub>濃度の上昇の抑制と朝の血漿中PGE<sub>2</sub>濃度の上昇は昼間分娩をする上で重要な役割をしていると考えられる.

To describe the mechanism of increasing day-time calving by night-time feeding, plasma concentration of Prostaglandin E<sub>2</sub> (PGE<sub>2</sub>) and cortisol were determined during a prepartum period. Fifty-five Holstein Friesian cows in the late pregnancy were divided into two groups, 28 cows were fed for 97.99% of TDN 7.35kg per cow in the evening, while other 27 cows were fed regularly in the morning and afternoon and served as controls. Blood was collected twice a day, in the morning between 4:00 and 5:00 and in the evening between 18:00 and 19:00 from 23 of the 55 cows for the measurment of PGE<sub>2</sub> and cortisol. Percentage of cows delivered in the day-time was 64.3% in the night-time feeding group and 51.9% in the regular-feeding group. In the night-time feeding group of cows, plasma PGE<sub>2</sub> in the evening was not specifically increased and plasma PGE<sub>2</sub> was higher in the morning than in the evening during the last 7 days of pregnancy, while no such a trend was seen in the regular feeding group. Among cows with night-time feeding the diural pattern of plama PGE<sub>2</sub> was more apparent in cows which delivered in the day-time than those calved in the night-time. Changes of plasma PGE<sub>2</sub> in cows during a prepartum period are closely associated with plasma cortisol. The results indicate that a restraint of plasma PGE<sub>2</sub> increasing in the evening and a rise of plasma PGE<sub>2</sub> in the morning after night-time feeding plays an important role in increasing day-time calving.

収録刊行物

  • 日本畜産學會報 = The Japanese journal of zootechnical science  

    日本畜産學會報 = The Japanese journal of zootechnical science 69(2), 133-139, 1998-02-25 

    Japanese Society of Animal Science

参考文献:  13件

参考文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

各種コード

  • NII論文ID(NAID)
    10021726845
  • NII書誌ID(NCID)
    AN00195188
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    1346907X
  • データ提供元
    CJP書誌  J-STAGE 
ページトップへ