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

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概要

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• 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 ad libitum (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.

• 日本繁殖生物学会の論文
• 2008-02-01

著者

• 宮本 明夫

  帯広畜産大学畜産学部

• Miyamoto Akio

  Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture & Veterinary Medicine

• MATSUI Motozumi

  Department of Clinically Veterinary Sciences, Obihiro University of Agriculture and Veterinary Medic

• Miyamoto Akio

  Graduate School Of Animal And Food Hygiene Obihiro University Of Agriculture And Veterinary Medicine

• 宮本 明夫

  帯広畜産大

• Shimizu Takashi

  Graduate School Of Animal And Food Hygiene Obihiro University Of Agriculture And Veterinary Medicine

• MIYAKE Yoh-Ichi

  Department of Veterinary Medicine, Obihiro University

• KAWASHIMA Chiho

  Field Center of Animal Science and Agriculture, Obihiro University of Agriculture and Veterinary Med

• KIDA Katsuya

  Field Center of Animal Science and Agriculture, Obihiro University of Agriculture and Veterinary Med

• MATSUHASHI Miki

  Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicin

• MATSUNAGA Nobuyoshi

  Department of Agricultural and Life Science, Obihiro University of Agriculture and Veterinary Medici

• ISHII Mitsuo

  Research Center for Animal Hygiene and Food Safety, Obihiro University of Agriculture and Veterinary

• Ishii Mitsuo

  Obihiro University Of Agriculture And Veterinary Medicine

• Ishii Mitsuo

  Department Of Applied Veterinary Medicine Obihiro University Of Agriculture And Veterinary Medicine

• Kida Katsuya

  Field Center Of Animal Science And Agriculture Obihiro University Of Agriculture And Veterinary Medi

• Matsui Motozumi

  Lab. Of Theriogenology Dep. Of Applied Veterinary Medicine Obihiro Univ. Of Agriculture And Veterina

• Kawashima Chiho

  Graduate School Of Animal And Food Hygiene Obihiro Univ. Of Agriculture And Veterinary Medicine

• MIYAKE Yoh-Ichi

  Obihiro University of Agriculture and Veterinary Medicine

• 三宅 陽一

  岩手大学 農学部家畜繁殖学研究室

• Miyake Yoh‐ichi

  Obihiro Univ. Agriculture And Veterinary Medicine Hokkaido

• Miyake Y

  Laboratory Of Theriogenology Faculty Of Agriculture Iwate University

• Amaya Montoya

  帯広畜産大学 畜産学研究科畜産衛生学

• Matsunaga Nobuyoshi

  Department Of Agricultural And Life Science Obihiro University Of Agriculture And Veterinary Medicin

• Kawashima Chiho

  Field Center Of Animal Science And Agriculture Obihiro University Of Agriculture And Veterinary Medi

• Matsui Motozumi

  Department Of Clinically Veterinary Sciences Obihiro University Of Agriculture And Veterinary Medici

• 清水 隆

  Graduate School Of Animal And Food Hygiene Obihiro University Of Agriculture And Veterinary Medicine

• Miyake Y

  Iwate Univ. Morioka Jpn

• 松井 基純

  The United Graduate School Of Veterinary Sciences Gifu University

• Matsunaga N

  Obihiro University Of Agriculture And Veterinary Medicine

• 宮本 明夫

  Graduate School Of Animal And Food Hygiene Obihiro University Of Agriculture And Veterinary Medicine

• 宮本 明夫

  帯広畜産大学・畜産科学科

• Miyamoto Akio

  Graduate School Of Animal And Food Hygiene Obihiro Univ. Of Agriculture And Veterinary Medicine

• Miyake Yoh-ichi

  Department Of Veterinary Medicine Obihiro University

• Kawashima Chiho

  Field Center Of Animal Sci. Obihiro Univ. Of Agriculture And Veterinary Medicine Hokkaido 080-8555 J

• Matsui Motozumi

  Department Of Clinical Veterinary Science Obihiro University Of Agriculture And Veterinary Medicine

• MATSUI Motozumi

  Department of Agricultural and Life Science, Obihiro University of Agriculture and Veterinary Medicine

• MIYAKE Yoh-Ichi

  Department of Applied Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine

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