Effect of Suckling on the Reproductive Performance and Metabolic Status of Obese Japanese Black Cattle during the Early Postpartum Period

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著者

    • MATSUI Motozumi
    • Department of Clinical Veterinary Science, Obihiro University of Agriculture and Veterinary Medicine
    • SHIMIZU Takashi
    • Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicine
    • MATSUNAGA Nobuyoshi
    • Department of Agricultural and Life Science, Obihiro University of Agriculture and Veterinary Medicine
    • ISHII Mitsuo
    • Research Center for Animal Hygiene and Food Safety, Obihiro University of Agriculture and Veterinary Medicine
    • MIYAKE Yoh-Ichi
    • Department of Clinical Veterinary Science, Obihiro University of Agriculture and Veterinary Medicine
    • MIYAMOTO Akio
    • Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicine

抄録

The aim of our study was to investigate the effects of suckling on reproductive performance and metabolic status of obese (mean body condition score of more than 4.0 on a scale of 1-5) maternal Japanese Black cows during early postpartum period. We used 7 postpartum Japanese Black cattle. Four cows were suckled <i>ad libitum</i> (suckled) until completion of their first artificial insemination (AI), while 3 cows were not suckled at all because they were separated from their calves immediately after parturition (non-suckled). Body weight and plasma concentrations of metabolites and hormones were measured from wk 1 to 9 postpartum. Ovarian activity was detected using plasma progesterone concentration, and all cows received their first AI after application of the Ovsynch protocol at approximately 4 months postpartum. Although body weights of non-suckled cows increased during experimental period (P<0.05), those of suckled cows remained unchanged. Plasma concentrations of glucose of non-suckled cows were higher at wk 2 postpartum (P<0.05) and their levels of non-esterified fatty acid tended to be lower at wk 1 and 2 postpartum compared with suckled cows (P<0.1); however, these differences between groups were not observed with progression of postpartum period. In addition, plasma insulin concentrations of non-suckled cows were higher than those of suckled cows during experimental period (P<0.05). During sampling period (wk 0 to 9 postpartum), onset of normal ovarian cycle was observed in all non-suckled and 2 of 4 suckled cows, and it was delayed in other 2 suckled cows compared with non-suckled cows; however, 3 suckled cows conceived at the first AI after application of the Ovsynch protocol; none of non-suckled cows conceived at this time. Overall, we suggest that suckling seems to reduce increase of body weight after parturition, although it does not improve obesity, and influences conception despite delay in resumption of normal ovarian cyclicity in obese Japanese Black cows.<br>

収録刊行物

  • The Journal of reproduction and development  

    The Journal of reproduction and development 54(1), 46-51, 2008-02-01 

    THE SOCIETY FOR REPRODUCTION AND DEVELOPMENT

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各種コード

  • NII論文ID(NAID)
    10021218491
  • NII書誌ID(NCID)
    AA10936678
  • 本文言語コード
    ENG
  • 資料種別
    NOT
  • ISSN
    09168818
  • NDL 記事登録ID
    9395292
  • NDL 雑誌分類
    ZR22(科学技術--農林水産--畜産)
  • NDL 請求記号
    Z54-H305
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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