2021/10/25 更新

写真a

ヨシダ チカコ
吉田 智佳子
YOSHIDA Chikako
所属
教育研究院 自然科学系 農学系列 助教
自然科学研究科 生命・食料科学専攻 助教
農学部 フィールド科学教育研究センター 助教
職名
助教
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外部リンク

学位

  • 農学博士「農学」 ( 2006年3月   広島大学 )

研究分野

  • ライフサイエンス / 動物生産科学

  • ライフサイエンス / 動物生産科学

経歴(researchmap)

  • 新潟大学   自然科学研究科 生命・食料科学専攻   助教

    2006年4月 - 現在

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  • 新潟大学   自然科学研究科 生命・食料科学専攻   助教

    2006年4月 - 現在

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  • 新潟大学   農学部 フィールド科学教育研究センター   助教

    2006年4月 - 現在

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経歴

  • 新潟大学   農学部 フィールド科学教育研究センター   助教

    2006年4月 - 現在

  • 新潟大学   自然科学研究科 生命・食料科学専攻   助教

    2006年4月 - 現在

  • 新潟大学   自然科学研究科 生命・食料科学専攻   助教

    2006年4月 - 現在

学歴

  • 広島大学   国際協力研究科   開発科学専攻

    - 2006年3月

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    国名: 日本国

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所属学協会

  • 日本畜産学会

    2005年 - 現在

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  • 日本繁殖生物学会

    2005年 - 現在

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  • 北信越畜産学会

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取得資格

  • 家畜人工授精師

 

論文

  • Short communication: Temporal changes in the skin morphology of dairy cows during the periparturient period 査読

    Banri Suzuki, Toshie Sugiyama, Chikako Yoshida, Toshihiko Nakao

    Journal of Dairy Science   101 ( 7 )   6616 - 6621   2018年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Elsevier Inc.  

    Management of dairy cow productivity requires monitoring of their nutritional status by visual observation. It has been suggested that changes in hair coat appearance are among the indicators of nutritional state in dairy cows. Temporal changes in the skin morphology in cows, however, have not been reported. In this study, we examined the changes in the skin of dairy cows that occur during the peripartum period. Seven pluriparous cows were used. Skin samples were collected at 28 d before the due date and 28 d and 56 d after calving for morphological examination. Hair follicle width was 108.8 ± 5.9 µm (±SD) in the dry period, 95.5 ± 5.5 µm at 28 d after calving, and 104.2 ± 5.3 µm at 56 d postpartum. The percentages of anagen hair follicles during these 3 periods were 41.4 ± 3.4, 18.5 ± 3.4, and 32.3 ± 3.3%, respectively. The corresponding sebaceous gland sizes were 8,362.0 ± 707.6, 7,800.0 ± 831.4, and 9,186.8 ± 962.6 µm2, respectively. Hair follicle width was positively correlated with percentage of anagen hair follicles. The thickness of epidermal and proliferation rate of epidermal cell were also correlated. However, the hair follicle width, sebaceous gland size and cell proliferation rate, and thickness and proliferation rate of epidermal cells did not show any marked changes.

    DOI: 10.3168/jds.2017-13831

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  • Days in Milk at First AI in Dairy Cows; Its Effect on Subsequent Reproductive Performance and Some Factors Influencing It 査読

    Muhammad Yusuf, Toshihiko Nakao, Chikako Yoshida, Su Thanh Long, Gokarna Gautam, R. M. S. Bimalka Kumari Ranasinghe, Kana Koike, Aki Hayashi

    JOURNAL OF REPRODUCTION AND DEVELOPMENT   57 ( 5 )   643 - 649   2011年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SOCIETY REPRODUCTION & DEVELOPMENT-SRD  

    The aim of the present study was to show the distribution of cows by days in milk (DIM) at first AI, effect of DIM at first AI on reproductive performance and some factors influencing DIM at first AI. A total of 767 Holstein Frisian cows that calved from January 2004 to December 2007 in 14 dairy herds were used. The first AI conception rate (FAICR) was 34.0%. Seventy-five percent of the cows were first inseminated within 100 days after calving. FAICR increased linearly up to 100 DIM. A one unit (20 days) longer DIM at first AI within the first 100 days postpartum increased the likelihood of a 2.4% FAICR. However, cows first inseminated at an earlier stage of lactation showed better reproductive performance in terms of pregnancy rate and calving to conception interval than cows first inseminated at a later stage. A one day increase in the interval from calving to first AI reduced the likelihood of 0.85 days to become pregnant. Herd or region located in southwestern Japan, tie-stall herd, first AI in spring, higher parity, uterine infection, metabolic diseases and/or mastitis and abnormal resumption of postpartum ovarian cycles contributed to delaying first AI.

    DOI: 10.1262/jrd.10-097T

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  • Adrenocortical Response in Cows after Intramuscular Injection of Long-Acting Adrenocorticotropic Hormone (Tetracosactide Acetate Zinc Suspension) 査読

    N. C. Thinh, C. Yoshida, S. T. Long, M. Yusuf, T. Nakao

    REPRODUCTION IN DOMESTIC ANIMALS   46 ( 2 )   296 - 300   2011年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY-BLACKWELL  

    Contents
    The objectives of this study were first to show adrenocortical response to a long-acting adrenocorticotropic hormone preparation (tetracosactide acetate zinc suspension) (ACTH-Z) and its effect on adrenocortical function in beef cows (<link rid="ss3">Experiment 1) and second to apply the ACTH-Z challenge in dairy cows based on cortisol concentrations in milk collected at routine milking (<link rid="ss4">Experiment 2). In <link rid="ss3">Experiment 1, four beef cows in luteal phase were challenged with ACTH-Z, and plasma cortisol concentrations were determined for 48 h after the injection at 30-min to 2-h intervals. A rapid ACTH test was conducted 3 days before and 2 h after the completion of ACTH-Z injection for 48 h to investigate the effect on adrenocortical function. Plasma cortisol concentrations increased significantly 30 min after ACTH-Z injection (p < 0.001), and the high cortisol levels were maintained for approximately 10 h after the injection. In <link rid="ss2">Experiment 2, eight dairy cows were subjected to ACTH-Z challenge 1-2 weeks and 4-5 weeks post-partum. Blood and milk samples were taken at morning and afternoon milking. All the cows showed a significant increase in cortisol concentrations in plasma as well as in skim milk 8 h after ACTH-Z injection 1-2 weeks and 4-5 weeks post-partum (p < 0.001). There was a significant correlation between plasma and skim milk cortisol concentrations 8 h after ACTH-Z challenge (r = 0.74, p < 0.001). The results obtained in this study suggest that elevated levels of plasma cortisol are maintained for approximately 10 h after ACTH-Z treatment without adverse effect on adrenocortical function and a long-acting ACTH-Z challenge based on cortisol concentrations in milk, which were collected at the morning and the afternoon milking, can be a useful tool to monitor adrenocortical function in cows.

    DOI: 10.1111/j.1439-0531.2010.01666.x

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  • Adrenocortical Response in Cows after Intramuscular Injection of Long-Acting Adrenocorticotropic Hormone (Tetracosactide Acetate Zinc Suspension) 査読

    Nc Thinh, C. Yoshida, St Long, M. Yusuf, T. Nakao

    Reproduction in Domestic Animals   46 ( 2 )   296 - 300   2011年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    The objectives of this study were first to show adrenocortical response to a long-acting adrenocorticotropic hormone preparation (tetracosactide acetate zinc suspension) (ACTH-Z) and its effect on adrenocortical function in beef cows (Experiment 1) and second to apply the ACTH-Z challenge in dairy cows based on cortisol concentrations in milk collected at routine milking (Experiment 2). In Experiment 1, four beef cows in luteal phase were challenged with ACTH-Z, and plasma cortisol concentrations were determined for 48h after the injection at 30-min to 2-h intervals. A rapid ACTH test was conducted 3days before and 2h after the completion of ACTH-Z injection for 48h to investigate the effect on adrenocortical function. Plasma cortisol concentrations increased significantly 30min after ACTH-Z injection (p&lt
    0.001), and the high cortisol levels were maintained for approximately 10h after the injection. In Experiment 2, eight dairy cows were subjected to ACTH-Z challenge 1-2weeks and 4-5weeks post-partum. Blood and milk samples were taken at morning and afternoon milking. All the cows showed a significant increase in cortisol concentrations in plasma as well as in skim milk 8h after ACTH-Z injection 1-2weeks and 4-5weeks post-partum (p&lt
    0.001). There was a significant correlation between plasma and skim milk cortisol concentrations 8h after ACTH-Z challenge (r=0.74, p&lt
    0.001). The results obtained in this study suggest that elevated levels of plasma cortisol are maintained for approximately 10h after ACTH-Z treatment without adverse effect on adrenocortical function and a long-acting ACTH-Z challenge based on cortisol concentrations in milk, which were collected at the morning and the afternoon milking, can be a useful tool to monitor adrenocortical function in cows. © 2010 Blackwell Verlag GmbH.

    DOI: 10.1111/j.1439-0531.2010.01666.x

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  • Congenital absence of a teat in a Japanese black heifer 査読

    Mohamed Elshabrawy Ghanem, Toshihiko Nakao, Chikako Yoshida

    Case Report in Veterinary Medicine   2011 ( 897065 )   - 3   2011年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Hindawi Limited  

    A case of Japanese Black heifer with a congenital absence of teat (athelia) was observed at Highashi-Hiroshima Agricultural High School, Hiroshima Prefecture, Japan. The heifer was born after transfer of embryo fromJapanese Black cattle. The sire of the heifer was a proven Japanese Black. The birth weight of the heifer was 27 kg. On physical examination of the heifer at 21 months after birth, the teat at fore left was absent and the remaining three teats were normal in shape without any physical abnormalities. Per rectal palpation of the genital organs revealed the normal cervix and uterine horns. It was difficult to palpate the ovaries due to the fat around the organs. Blood samples were taken for cytogenetic and DNA testing. The heifer had normal chromosomal set. The heifer was culled due to its mammary abnormality. This might be the first to report a case of congenital absence of a teat in Japanese Black heifers.

    DOI: 10.1155/2011/897065

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  • Comparison in Effect of Heatsynch with Heat Detection Aids and CIDR-Heatsynch in Dairy Heifers 査読

    M. Yusuf, T. Nakao, C. Yoshida, S. T. Long, S. Fujita, Y. Inayoshi, T. Furuya

    REPRODUCTION IN DOMESTIC ANIMALS   45 ( 3 )   500 - 504   2010年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY-BLACKWELL  

    Contents
    The objective of the present study was to determine whether oestrous detection with the help of oestrous detection aids during the Heatsynch without timed AI protocol is equally effective with the progesterone-combined protocol in dairy heifers. A total of 148 heifers were randomly assigned to one of the two groups. A group of heifers treated with Heatsynch with heat detection aids (n = 72) received GnRH on day 0, prostaglandin F(2 alpha) (PGF(2 alpha)) on day 7 and oestradiol benzoate (EB) on day 8, while in controlled internal drug release (CIDR)-Heatsynch group (n = 76), CIDR was included during a period from GnRH to PGF(2 alpha). Heifers were checked for oestrus twice daily, i.e. from 09:00 to 10:00 hours and from 15:00 to 16:00 hours starting on day 2 for Heatsynch group and on day 8 in CIDR-Heatsynch group, and continued up to day 12. KAMAR (R) heat mount detector (KAMAR (R) Inc., Steamboat Springs, CO, USA) and ALL-WEATHER (R) PAINTSTIK (R) (LA-CO Industries Inc., Elk Grove Village, IL, USA) were used as heat detection aids. AI was conducted within 1 h after confirming oestrus in 72 heifers, while 19 animals were transferred with embryo 7 days after oestrus according to the request of the owners. Premature oestrus before PGF(2 alpha) injection occurred in 18% of Heatsynch group. Of 13 heifers which showed premature oestrus, six were inseminated and two of them conceived. Oestrus detection rate within 12 days after initiation of the protocols did not differ between the two groups (94% vs 95%). There was no difference in the conception rate after first AI (including heifers that were inseminated before PGF(2 alpha) injection) and embryo transfer between Heatsynch with heat detection aids and CIDR-Heatsynch groups (36% vs 44% and 70% vs 56%). It is concluded that the use of heat detection aids to monitor the occurrence of premature oestrus prior to PGF(2 alpha) injection in Heatsynch protocol in dairy heifers was equally effective to the inclusion of CIDR.

    DOI: 10.1111/j.1439-0531.2008.01277.x

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  • Reproductive performance of repeat breeders in dairy herds 査読

    Muhammad Yusuf, Toshihiko Nakao, R. M. S. Bimalka Kumari Ranasinghe, Gokarna Gautam, Su Thanh Long, Chikako Yoshida, Kana Koike, Aki Hayashi

    THERIOGENOLOGY   73 ( 9 )   1220 - 1229   2010年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE INC  

    The objectives were to characterize repeat breeding in dairy cows, including reproductive performance and risk factors Data from 613 Holstein Friesian cows in nine daily herds across Japan were enrolled A repeat breeder was defined as a cow that did not become pregnant after three inseminations, despite no clinically detectable reproductive disorders In contrast, cows that became pregnant within three inseminations were considered to have normal fertility Of the 613 cows, 87.3% eventually became pregnant after repeated Al (maximum calving to conception interval was 435 d) Mean (+/- SEM) first Al conception rate, clays in milk at first Al, calving to conception interval and service per conception were 38 3%, 82 +/- 2 d, 125 +/- 3 d, and 20 +/- 0 1 times. respectively Normal fertility cows (n = 479) required only 114 3 d to conceive and 1 7 +/- 0 1 inseminations per pregnancy, whereas repeat breeders (n = 86) required significantly more days to conceive (211 +/- 10) and more inseminations per pregnancy (4 7 +/- 0.2) Based on survival analysis. it took 94 d after calving for 50% of normal fertility cows to become pregnant, compared to 155 d for repeat breeders For repeat breeders, 31 4, 50 0, and 58 1% became pregnant within 210, 300, and 435 d after calving, respectively The risk factors for repeat breeding were parity (relative risk [RR] = 0 809, P = 0 058), resumption of postpartum ovarian cycles (RR = 1 928. P = 0 009), and days in milk at first Al (RR = 0991. P = 0 039) In conclusion, repeat breeder dairy cows had very poor reproductive performance Lower parity, abnormal resumption of postpartum ovarian cycles, and shorter clays in milk at first Al were risk factors for repeat breeding. (c) 2010 Elsevier Inc All rights reserved

    DOI: 10.1016/j.theriogenology.2010.01.016

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  • Defining delayed resumption of ovarian activity postpartum and its impact on subsequent reproductive performance in Holstein cows 査読

    G. Gautam, T. Nakao, K. Yamada, C. Yoshida

    THERIOGENOLOGY   73 ( 2 )   180 - 189   2010年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE INC  

    The objectives of this study were to derive a useful case definition of delayed resumption of ovarian activity, based on factors associated with reduced fertility, and to assess its impact on subsequent reproductive performance in Holstein cows (Bos taunts). Milk samples were collected twice weekly from 219 cows from four commercial herds, and whole-milk progesterone concentrations were determined with an enzyme-linked immunosorbent assay. Ovulation was considered to have occurred 5 d before the first rise of milk progesterone concentration above the basal level. Survival analysis was used to derive a case definition of delayed resumption of ovarian activity postpartum based on factors that were predictive of reduced pregnancy rate. First postpartum ovulation occurring beyond 35 d postpartum was associated with a reduced pregnancy rate (hazard ratio [HR] = 0.50; P < 0.001) and was defined as delayed resumption of ovarian activity; overall, 75 (34.9%) cows were in this category. These cows were more likely not to conceive on first artificial insemination (odds ratio [OR] = 2.85; P = 0.01) and more likely not to become pregnant within 100 d (OR = 3.30; P = 0.001) and 210 d (OR = 3.20; P < 0.001) postpartum compared with cows with normal resumption of ovarian activity. Furthermore, 13(6%) cows that ovulated within 35 d postpartum had a prolonged (>= 14 d) interval between either first and second or second and third luteal phases postpartum. A prolonged interluteal interval was also associated with a reduced pregnancy rate (HR = 0.35; P = 0.02). Days open (mean +/- SEM) were greater (P = 0.0002) in cows with delayed resumption of ovarian activity (213 +/- 13 d) and in cows with prolonged interluteal interval (220 +/- 37 d) than in cows with normal resumption of ovarian activity (152 +/- 9 d). In conclusion, first ovulation occurring beyond 35 d postpartum was defined as delayed resumption of ovarian activity, and the first ovulation occurring within 35 d postpartum but the absence of luteal activity >= 14 d between two consecutive luteal phases was defined as a prolonged interluteal interval; both abnormalities adversely affected the subsequent reproductive performance of Holstein cows. (C) 2010 Elsevier Inc. All rights reserved.

    DOI: 10.1016/j.theriogenology.2009.08.011

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  • Plasma Progesterone Profile in Ovariectomized Beef Cows after Intra-vaginal Insertion of New, Once-used or Twice-used CIDR 査読

    S. T. Long, C. Yoshida, T. Nakao

    REPRODUCTION IN DOMESTIC ANIMALS   44 ( 1 )   80 - 82   2009年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY-BLACKWELL PUBLISHING, INC  

    Objective of this study was to show plasma progesterone concentrations in ovariectomized beef cows after treatment with new, once-used and twice-used controlled internal drug-releasing devices (CIDRs). Four ovariectomized beef cows were used for the experiment. Plasma concentrations of progesterone were quantified using a validated ELISA. The CIDR was inserted into vagina of cows by using a standard CIDR applicator and then removed 7 days after insertion. One week later, once-used CIDR was inserted and removed on day 7. Twice-used CIDR was, then inserted at an interval of 7 days. Mean plasma concentrations of progesterone 24 h after new CIDR insertion was 4.0 +/- 0.1 ng/ml, which thereafter decreased gradually to 1.4 +/- 0.1 ng/ml at day 7. In cows treated with once-used CIDR or twice-used CIDR, mean plasma progesterone concentrations at day 1 were 2.4 +/- 0.2 or 1.8 +/- 0.2 ng/ml and 1.0 +/- 0 or 0.9 +/- 0.1 ng/ml at day 7 respectively. The results suggest that once-used CIDR may be still effective to produce luteal phase progesterone concentrations in plasma in non-suckling beef cows.

    DOI: 10.1111/j.1439-0531.2007.01000.x

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  • Duration of estrus induced after GnRH-PGF(2 alpha) protocol in dairy heifer 査読

    Chikako Yoshida, Muhammad Yusuf, Toshihiko Nakao

    ANIMAL SCIENCE JOURNAL   80 ( 6 )   649 - 654   2009年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY-BLACKWELL  

    Estrous expressions in dairy cows have been shortened and weakened. Dairy heifers, on the other hand, may not have had such changes in estrous signs as observed in cows, since they have less stresses than cows. The aim of this study was to describe the duration of estrus in a herd of dairy heifers. A total of 56 Holstein Friesian heifers estrus was synchronized using two different hormonal protocols. They were checked for primary and secondary estrous signs with the help of heat detection devices for 48 h at an interval of 4 h starting at 16.00 hour, one day after PGF(2 alpha) treatment. Onset and end of standing estrus during 48 h observation period was recorded in 35 of the 44 heifers coming into estrus within 5 days after PGF(2 alpha) treatment during the observation period. The duration of standing estrus on the average (+/- SD) was 9.7 +/- 5.3 h. Percentage of heifers with standing estrus longer than 12 h was 40%, and 53% showed standing estrus only for 4-8 h. It is indicated that duration of estrus in dairy heifers has been shortened recently.

    DOI: 10.1111/j.1740-0929.2009.00694.x

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  • Duration of estrus induced after GnRH-PGF(2 alpha) protocol in dairy heifer 査読

    Chikako Yoshida, Muhammad Yusuf, Toshihiko Nakao

    ANIMAL SCIENCE JOURNAL   80 ( 6 )   649 - 654   2009年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY-BLACKWELL  

    Estrous expressions in dairy cows have been shortened and weakened. Dairy heifers, on the other hand, may not have had such changes in estrous signs as observed in cows, since they have less stresses than cows. The aim of this study was to describe the duration of estrus in a herd of dairy heifers. A total of 56 Holstein Friesian heifers estrus was synchronized using two different hormonal protocols. They were checked for primary and secondary estrous signs with the help of heat detection devices for 48 h at an interval of 4 h starting at 16.00 hour, one day after PGF(2 alpha) treatment. Onset and end of standing estrus during 48 h observation period was recorded in 35 of the 44 heifers coming into estrus within 5 days after PGF(2 alpha) treatment during the observation period. The duration of standing estrus on the average (+/- SD) was 9.7 +/- 5.3 h. Percentage of heifers with standing estrus longer than 12 h was 40%, and 53% showed standing estrus only for 4-8 h. It is indicated that duration of estrus in dairy heifers has been shortened recently.

    DOI: 10.1111/j.1740-0929.2009.00694.x

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  • 乳汁中Progesterone測定と発情・排卵同期化の応用による乳牛群の繁殖プログラムの有用性 査読

    吉田智佳子, 中尾敏彦, 若竹修一

    日本畜産学会第107回大会   90 - 90   2007年3月

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    記述言語:日本語   掲載種別:研究論文(その他学術会議資料等)  

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  • Resumption of ovarian cyclicity postpartum in a dairy herd with robot milking system 査読

    Yusuf Muhammad, 中尾敏彦, 吉田智佳子, 小林清敬, 大西理恵

    日本畜産学会第107回大会   88 - 88   2007年3月

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    記述言語:英語   掲載種別:研究論文(その他学術会議資料等)  

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  • 山口県の1ホルスタイン種乳牛群における分娩後卵巣機能回復異常の発生とその要因 査読

    小池佳菜, 中尾敏彦, 吉田智佳子

    平成18年度日本産業動物獣医学会   2007年2月

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    記述言語:日本語   掲載種別:研究論文(その他学術会議資料等)  

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  • Plasma cortisol and progesterone responses to low doses of adrenocorticotropic hormone in ovariectmized lactating cows 査読

    Chikako Yoshida, Toshihiko Nakao

    JOURNAL OF REPRODUCTION AND DEVELOPMENT   52 ( 6 )   797 - 803   2006年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SOCIETY REPRODUCTION & DEVELOPMENT-SRD  

    The objective of this study was to describe the responses of the plasma progesterone and cortisol concentrations in ovariectomized lactating cows to low doses of adrenocorticotropic hormone (ACTH). The estrous cycles in 3 lactating cows were synchronized, and the cows were ovariectomized in the luteal phase. ACTH challenge tests were conducted at doses of 3, 6, 12 and 25 IU. Blood samples were collected at 30 min intervals, and the plasma progesterone and cortisol concentrations were analyzed by EIA. A concomitant rise in plasma progesterone and plasma cortisol was observed in cows treated with 12 IU or higher doses of ACTH. Significant increments in the plasma cortisol concentrations were observed at all doses of ACTH. The means ( SE) of the peak plasma progesterone concentrations after the 3, 6, 12 and 25 IU ACTH challenge tests were 0.6 +/- 0.1, 1.3 +/- 0.4, 1.5 +/- 0.3 and 2.4 +/- 0.3 ng/ml, respectively. The means of the peak plasma cortisol concentrations in the 3 cows after the ACTH challenge were 14.0 +/- 1.5, 17.0 +/- 2.5, 23.3 +/- 3.0, and 33.3 +/- 7.0 ng/ml, respectively. The effects of the doses, time after treatment, and their interaction on the plasma progesterone concentrations after the ACTH challenge were significant (P < 0.01). Likewise, the effects of the doses, time after treatment, and their interaction on the plasma cortisol concentrations after the ACTH challenge were significant (P < 0.01). The mean AUC values for the plasma progesterone and cortisol concentrations after the ACTH treatments were also significantly affected by the dose of ACTH (P < 0.01 and P < 0.05, respectively). A significantly positive correlation was obtained between the peak plasma progesterone and cortisol concentrations after different doses of ACTH (r=0.7, P < 0.05). The results suggest that lactating dairy cows are capable of secreting a significant amount of adrenal progesterone, reaching up to the minimal concentration necessary to cause suppression of estrus in response to 12 IU ACTH (P < 0.01). The concomitant plasma cortisol concentration was 23.3 ng/ml.

    DOI: 10.1262/jrd.17051

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  • Plasma cortisol and progesterone responses to low doses of adrenocorticotropic hormone in ovariectmized lactating cows 査読

    Chikako Yoshida, Toshihiko Nakao

    JOURNAL OF REPRODUCTION AND DEVELOPMENT   52 ( 6 )   797 - 803   2006年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SOCIETY REPRODUCTION & DEVELOPMENT-SRD  

    The objective of this study was to describe the responses of the plasma progesterone and cortisol concentrations in ovariectomized lactating cows to low doses of adrenocorticotropic hormone (ACTH). The estrous cycles in 3 lactating cows were synchronized, and the cows were ovariectomized in the luteal phase. ACTH challenge tests were conducted at doses of 3, 6, 12 and 25 IU. Blood samples were collected at 30 min intervals, and the plasma progesterone and cortisol concentrations were analyzed by EIA. A concomitant rise in plasma progesterone and plasma cortisol was observed in cows treated with 12 IU or higher doses of ACTH. Significant increments in the plasma cortisol concentrations were observed at all doses of ACTH. The means ( SE) of the peak plasma progesterone concentrations after the 3, 6, 12 and 25 IU ACTH challenge tests were 0.6 +/- 0.1, 1.3 +/- 0.4, 1.5 +/- 0.3 and 2.4 +/- 0.3 ng/ml, respectively. The means of the peak plasma cortisol concentrations in the 3 cows after the ACTH challenge were 14.0 +/- 1.5, 17.0 +/- 2.5, 23.3 +/- 3.0, and 33.3 +/- 7.0 ng/ml, respectively. The effects of the doses, time after treatment, and their interaction on the plasma progesterone concentrations after the ACTH challenge were significant (P < 0.01). Likewise, the effects of the doses, time after treatment, and their interaction on the plasma cortisol concentrations after the ACTH challenge were significant (P < 0.01). The mean AUC values for the plasma progesterone and cortisol concentrations after the ACTH treatments were also significantly affected by the dose of ACTH (P < 0.01 and P < 0.05, respectively). A significantly positive correlation was obtained between the peak plasma progesterone and cortisol concentrations after different doses of ACTH (r=0.7, P < 0.05). The results suggest that lactating dairy cows are capable of secreting a significant amount of adrenal progesterone, reaching up to the minimal concentration necessary to cause suppression of estrus in response to 12 IU ACTH (P < 0.01). The concomitant plasma cortisol concentration was 23.3 ng/ml.

    DOI: 10.1262/jrd.17051

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  • Postpartum ovarian dysfunction in High-producing dairy cows as a possible cause of declining fertility 査読

    Toshihiko Nakao, Chikako Yoshida, Kyoji Yamada, Marie Chikuami, Makoto Ogawa, Yusuke Fujii

    24th World Buiatrics Congress   2006年10月

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  • Adrenocortical response to machine milking and forced walking in cows 査読

    Chikako Yoshida, Toshihiko Nakao

    24th World Buiatrics Congress   2006年10月

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  • 乳牛における発情徴候と人工授精による受胎率との関係 査読

    吉田智佳子, 中尾敏彦, 鈴木俊彦, 前田陽平, 秋田真司

    第142回日本獣医学会学術集会 講演要旨集   132 - 132   2006年9月

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  • Incidence of delayed first postpartum ovulation and prolonged luteal phase after the first or the second ovulation postpartum in Holstein cows and its effects of subsequent reproductive performance. 査読

    Toshihiko Nakao, Chikako Yoshida, Kyoji Yamada, Marie Chikuami, Makoto Ogawa, Yusuke Fujii

    Theriogenology   66   679 - 680   2006年9月

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    記述言語:英語   掲載種別:研究論文(その他学術会議資料等)  

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  • 卵巣割去した乳牛の低用量ACTH負荷および直腸検査刺激に対する血中CortisolとProgesterone濃度の反応 査読

    吉田智佳子, 中尾敏彦, Muhanmad Yusuf, Su Thanh Long, Bimalka Ranasinghe

    Japanese Reproduction and Development   52   j50 - j50   2006年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.14882/jrds.99.0.12.0

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  • 飼養管理状態の異なる2牛群の分娩後卵巣機能回復状況の比較 査読

    吉田智佳子, 中尾敏彦, 小林清敬, 伊藤理恵

    平成17年度日本産業動物獣医学(中国),講演抄録   31 - 31   2005年10月

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  • 公共育成牧場で飼養されている乳用育成牛における発情持続時間 査読

    吉田智佳子, 中尾敏彦, 稲吉洋裕

    第140回日本獣医学会学術集会 講演要旨集   151 - 151   2005年9月

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  • Relationship between Resumption of Ovarian Cyclicity and Oestrous Expression in Postpartum Dairy Cows 査読

    Chikako Yoshida, Tomoko Yoshimura, Toshihiko Nakao

    Reproduction in Domestic Animals   40   378 - 378   2005年9月

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  • 乳牛における発情徴候と発情時の血漿中Progesterone濃度との関係 査読

    吉田智佳子, 中尾敏彦

    Japanese Reproduction and Development   51   j96 - j96   2005年9月

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  • 乳牛の分娩後における卵巣機能回復異常および尿腟の発生状況とこれらが繁殖成績に及ぼす影響 査読

    藤井祐介, 吉田智佳子, 中尾敏彦

    Japanese Reproduction and Development   51   j97 - j97   2005年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.14882/jrds.98.0.90.0

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  • GnRH・PGF2α7日間隔投与法(Select Synch)およびSelect Synch+CIDRによる乳用育成牛の発情同期化効果 査読

    吉田智佳子, 中尾敏彦, 稲吉洋裕

    第140回日本獣医学会学術集会 講演要旨集   154 - 154   2005年9月

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  • 飼養管理状態の異なる2牛群の分娩後卵巣機能回復状況の比較 査読

    吉田智佳子, 中尾敏彦, 小林清敬, 伊藤理恵

    山口県獣医学会   2005年8月

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  • Some characteristics of primary and secondary oestrous signs in high-producing dairy cows 査読

    C Yoshida, T Nakao

    REPRODUCTION IN DOMESTIC ANIMALS   40 ( 2 )   150 - 155   2005年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:BLACKWELL VERLAG GMBH  

    Shortened and weakened oestrous signs in dairy cows may cause a failure of oestrus detection and artificial insemination timing error leading to poor reproductive performance. The aims of this study were to investigate the duration of standing oestrus in high-producing dairy cows under a free stall system, to determine the duration of expression of secondary oestrous signs before and after standing oestrus (Expt 1) and to compare the duration and intensity of oestrus between cows and heifers (Expt 2). Cattle were checked for primary and secondary oestrous signs at an interval of 4 h. Heat detection aids were also used. In Expt 1, of 56 cows which were detected in oestrus, 36 cows (64.3%) showed standing oestrus and other 20 cows (36.6%) showed secondary oestrous signs only. Duration of the standing oestrus was 6.6 +/- 6.3 h on average (+/- SD), ranging between 2 and 32 h. The cows in standing oestrus showed secondary oestrous signs during a period from 9.6 +/- 8.1 h before onset of standing to 18.4 +/- 18.8 h after the end of standing oestrus. In the cows that did not show standing oestrus, expression of secondary oestrous signs were observed for 25.7 +/- 20.5 h, which was 7.5 It shorter than the average duration of oestrus in cows showing standing oestrus. In Expt 2, nine (82%) of the 11 lactating cows in oestrus showed standing, while all the 10 heifers exhibited standing oestrus. Average duration of standing oestrus was 6.4 +/- 4.3 h in cows and 6.2 +/- 3.9 It in heifers, respectively. It may be concluded that the duration of standing oestrus is substantially shortened in lactating dairy cows, and more than one-third of cows did not show standing oestrus. In cows showing standing oestrus, duration of expression of secondary oestrous signs before and after standing is not shortened. Duration of standing oestrus in heifers was as short as that in cows.

    DOI: 10.1111/j.1439-0531.2005.00572.x

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  • 乳牛の分娩後における卵巣機能回復と発情発現 査読

    吉田智佳子, 中尾敏彦

    日本畜産学会第104回大会 講演要旨   44 - 44   2005年3月

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  • Response of plasma cortisol and progesterone after ACTH challenge in ovariectomized lactating dairy cows 査読

    C Yoshida, T Nakao

    JOURNAL OF REPRODUCTION AND DEVELOPMENT   51 ( 1 )   99 - 107   2005年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SOCIETY REPRODUCTION & DEVELOPMENT-SRD  

    Shortened and weakened estrous expressions could be one of the causes of poor heat detection rate. Non-specific acute stresses are assumed to depress expression of estrus by an increase of plasma progesterone which may originate from the adrenal cortex. The objective of the present study was to examine whether the adrenal cortex can secrete significant amounts of progesterone in response to exogenous adrenocorticotropic hormone (ACTH) in lactating cows. Four cows had estrus synchronized and were ovariectomized in the luteal phase. The cows were given 25 IU ACTH through an indwelling catheter 5 h after catheterization. Blood samples were collected at an interval of 30 min. In 3 of the 4 cows, plasma progesterone concentrations increased significantly 0.5-1.5 h after the first ACTH challenge with a mean peak value of 4.2 +/- 0.4 (S.D.) ng/ml. A similar response was also observed after the second ACTH challenge. Peak plasma progesterone concentrations in the 3 cows after first ACTH challenge were comparable with the progesterone values in the luteal phase of each cow. The results suggest that lactating cows have the capability to secrete a significant amount of progesterone from the adrenal cortex.

    DOI: 10.1262/jrd.51.99

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  • A case of freemartin with atresia recti and ani in Japanese Black calf 査読

    ME Ghanem, C Yoshida, M Nishibori, T Nakao, H Yamashiro

    ANIMAL REPRODUCTION SCIENCE   85 ( 3-4 )   193 - 199   2005年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    A female Japanese Black calf was born on 25 March 2003 at Hiroshima University Farm as a co-twin to a male Japanese Black calf. The male calf showed no external urogenital abnormalities. The absence of anal opening and external features of freemartinism were observed in the female. A small opening to the vulva (about 1.5 cm in length) with fused lips and a prominent clitoris were seen. The hair around the vulva was 3.5 cm in length and was heavy and dense. The distance from the vulva to the atretic anus was 9.0 cm. There were no other detectable abnormalities on physical examination. The PCR-based DNA test showed male-specific sequences confirming the calf to be freemartin. At autopsy I day after the calf birth, the gonads were found to be small and hard and the left uterine horn showed segmental aplasia near its proximal end. Two seminal glands (remnants of mesonephric duct) were located on both sides of the uterine body. A cervix was absent. The vagina was underdeveloped and looked like a tubual structure. The rectal end was closed, while the distance from the end of the atretic rectum to the absent anal opening was about 4.0 cm. On histological examination, the gonads exhibited extensive morphologic alteration; there was no cortex with the absence of ovarian structures. The seminal glands consisted of hypoplastic glandular tissue surrounded by extensive fibrous connective tissue. In conclusion, this is a case report of a freemartin with atresia recti and ani. (C) 2004 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.anireprosci.2004.04.044

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  • A case of freemartin with atresia recti and ani in Japanese Black calf 査読

    ME Ghanem, C Yoshida, M Nishibori, T Nakao, H Yamashiro

    ANIMAL REPRODUCTION SCIENCE   85 ( 3-4 )   193 - 199   2005年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    A female Japanese Black calf was born on 25 March 2003 at Hiroshima University Farm as a co-twin to a male Japanese Black calf. The male calf showed no external urogenital abnormalities. The absence of anal opening and external features of freemartinism were observed in the female. A small opening to the vulva (about 1.5 cm in length) with fused lips and a prominent clitoris were seen. The hair around the vulva was 3.5 cm in length and was heavy and dense. The distance from the vulva to the atretic anus was 9.0 cm. There were no other detectable abnormalities on physical examination. The PCR-based DNA test showed male-specific sequences confirming the calf to be freemartin. At autopsy I day after the calf birth, the gonads were found to be small and hard and the left uterine horn showed segmental aplasia near its proximal end. Two seminal glands (remnants of mesonephric duct) were located on both sides of the uterine body. A cervix was absent. The vagina was underdeveloped and looked like a tubual structure. The rectal end was closed, while the distance from the end of the atretic rectum to the absent anal opening was about 4.0 cm. On histological examination, the gonads exhibited extensive morphologic alteration; there was no cortex with the absence of ovarian structures. The seminal glands consisted of hypoplastic glandular tissue surrounded by extensive fibrous connective tissue. In conclusion, this is a case report of a freemartin with atresia recti and ani. (C) 2004 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.anireprosci.2004.04.044

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  • Response of plasma cortisol and progesterone after ACTH challenge in ovariectomized lactating dairy cows 査読

    C Yoshida, T Nakao

    JOURNAL OF REPRODUCTION AND DEVELOPMENT   51 ( 1 )   99 - 107   2005年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SOCIETY REPRODUCTION & DEVELOPMENT-SRD  

    Shortened and weakened estrous expressions could be one of the causes of poor heat detection rate. Non-specific acute stresses are assumed to depress expression of estrus by an increase of plasma progesterone which may originate from the adrenal cortex. The objective of the present study was to examine whether the adrenal cortex can secrete significant amounts of progesterone in response to exogenous adrenocorticotropic hormone (ACTH) in lactating cows. Four cows had estrus synchronized and were ovariectomized in the luteal phase. The cows were given 25 IU ACTH through an indwelling catheter 5 h after catheterization. Blood samples were collected at an interval of 30 min. In 3 of the 4 cows, plasma progesterone concentrations increased significantly 0.5-1.5 h after the first ACTH challenge with a mean peak value of 4.2 +/- 0.4 (S.D.) ng/ml. A similar response was also observed after the second ACTH challenge. Peak plasma progesterone concentrations in the 3 cows after first ACTH challenge were comparable with the progesterone values in the luteal phase of each cow. The results suggest that lactating cows have the capability to secrete a significant amount of progesterone from the adrenal cortex.

    DOI: 10.1262/jrd.51.99

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  • 跛行および搾乳が発情牛の血漿中コルチゾール濃度に及ぼす影響 査読

    吉田智佳子, 中尾敏彦

    Japanese Reproduction and Development   50   j80 - j80   2004年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

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  • Expression of Estrus Signs during Pre-service and Service Periods Postpartum in High-Producing Dairy Cows and a Possible Role of Stress in Depression of Estrus 査読

    Chikako Yoshida, Toshihiko Nakao

    23rd World Buiatrics Congress   153 - 153   2004年7月

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  • Atresia ani with diphallus and separate scrota in a calf: a case report 査読

    M Ghanem, C Yoshida, N Isobe, T Nakao, H Yamashiro, H Kubota, Y Miyake, K Nakada

    THERIOGENOLOGY   61 ( 7-8 )   1205 - 1213   2004年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE INC  

    Atresia ani, a common genetic defect in animals, is often accompanied by urogenital defects in calves. This paper reports a case of atresia ani with diphallus and separate scrota in a calf. The calf was born with atresia ani; surgery (to open the anus) was performed 3 days after birth. No urogenital abnormalities were noticed until 4 months after birth. At that time, two separate scrota (each containing a testis) and a sac-like structure in the middle of two scrota, were visible. The gait was abnormal, with abduction of the hind limbs while walking. Additionally, the hind legs appeared wider than usual at the hip joints. Two weeks later, two peni (diphallia) was observed, each in a separate preputial sheath. The calf had a normal karyotype on cytogenetic examination. Plasma concentrations of testosterone at 5.5, 6, and 7 months of age were 3.5, 1.9, and 1.7 ng/ml, respectively. At necropsy (7 months of age), the prepuce was thick and the glans of the right penis was adhered to the prepuce. The left penis did not have a urethra or retractor penis muscles. The sac-like structure in the middle of the two scrota contained the urinary bladder and a loop of small intestine. The pubic bone had failed to fuse at the pelvic symphysis. In conclusion, this is the first reported case of atresia ani with diphallus, separate scrota, and pubic bone separation in a calf. (C) 2003 Elsevier Inc. All rights reserved.

    DOI: 10.1016/j.theriogenology.2003.04.002

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  • 卵巣割去牛におけるACTH負荷用量と血中cortisolおよびprogesterone濃度反応 査読

    吉田智佳子, 中尾敏彦

    第137回 日本獣医学会学術集会 講演要旨集   128 - 128   2004年4月

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  • Incidence of silent ovulation in dairy cows during post partum period 査読

    N Isobe, T Yoshimura, C Yoshida, T Nakao

    DEUTSCHE TIERARZTLICHE WOCHENSCHRIFT   111 ( 1 )   35 - 38   2004年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:M H SCHAPER GMBH CO KG  

    The present study was undertaken to show the incidence of silent ovulation in high producing dairy cows, by monitoring ovarian cyclicity based on practical milk progesterone assay which was established in this study. The direct milk progesterone enzyme linked immunosorbent assay (ELISA) was developed using anti-progesterone-3(E)-carboxymethyloxime-BSA antibody for the antibody and horse radish peroxidase labeled progesterone for tracer. High sensitivity (26 mug/mL, 0.65 pg/well), high recovery rates (83-97 %), high reproducibility (CV of intra-assay 4.8-11.5 %; CV of inter-assay 14.3-19.1 %) and high correlation between milk progesterone concentrations measured by the direct ELISA and the values obtained by the ELISA after extraction proved the reliability of the assay. In second experiment the incidence of silent ovulation was investigated based on the milk progesterone concentrations in 32 dairy cows within 70 days postpartum. The incidences of silent ovulation at the first, second, third and fourth ovulation postpartum were 83, 46, 13 and 0 %, respectively. Most commonly observed patterns of sequential occurrence of silent ovulation in cows ovulating 2, 3 or 4 times within 70 days postpartum were silent-estrus (50 %), silent-silent-estrus (60 %) and silent-silent-estrus-estrus (67 %), respectively. These results suggest that the present ELISA is a reliable and practically applicable method for determination of progesterone in milk and that high producing dairy cows show a high incidence of silent ovulation at the first postpartum ovulation as well as the second ovulation, which then decreased with the increased frequency of ovulation.

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  • 卵巣割去した泌乳牛におけるACTH負荷に対する血中プロジェステロンおよびコルチゾールの反応 査読

    吉田智佳子, 中尾敏彦

    Japanese Reproduction and Development   49   j40 - j40   2003年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

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  • Decreased intensity of estrus signs in high-producing dairy cows and a possible role of adrenal progesterone in depression of estrus signs. 査読

    Chikako Yoshida, Toshihiko Nakao

    6th Budapest Workshop on Clinical Endocrinology   2003年6月

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  • フリーストール牛群における乳牛の発情徴候と持続時間 査読

    吉田智佳子, 中尾敏彦

    日本畜産学会第101回大会 講演要旨集   88 - 88   2003年3月

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  • スタンディング感知器によって観察された和牛の発情特性と受胎率 査読

    吉田智佳子, 中尾敏彦

    第95回 日本繁殖生物学会 講演要旨集   89 - 89   2002年9月

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  • Duration of Estrus and Vaginoscopic Finding at the Time of Artificial Insemination in High-Producing Dairy Cows and Heifers 査読

    Chikako Yoshida, Toshihiko Nakao

    22nd World Buiatrics Congress   112 - 112   2002年8月

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書籍等出版物

  • 乳牛の繁殖管理プログラム繁殖成績向上の理論と実際

    中尾敏彦, 青柳敬人, 安部明徳, 安藤達哉, 石井三都夫, 吉田智佳子( 担当: 共著 ,  範囲: III章 人工授精による繁殖成績低下の原因 1発情発見上の問題,3240 頁,IV章 人工授精による繁殖成績向上のための繁殖管理プログラム 2発情発見率を上げるための繁殖管理,正しい発情発見,発情発見補助器具の応用,6169頁)

    デーリィマン社  2003年10月 

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MISC

  • 乳牛における発情徴候の短縮化と発情徴候を抑制しうる内分泌的機序

    吉田智佳子, 中尾敏彦

    新潟大学農学部研究報告   第59巻,1号   1 - 9   2006年8月

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    記述言語:日本語   掲載種別:記事・総説・解説・論説等(大学・研究所紀要)  

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  • フリーストール牛群における乳牛の発情徴候の特徴と発情発見のポイント

    吉田智佳子, 中尾敏彦

    デーリィ・ジャパン   第48巻, 第19号   22 - 26   2003年11月

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    記述言語:日本語   掲載種別:記事・総説・解説・論説等(学術雑誌)  

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共同研究・競争的資金等の研究

  • 乳牛の分娩後生殖機能回復モニタリングに基づく繁殖効率向上プログラムの開発

    2008年4月 - 2011年3月

    日本学術振興会  科学研究費助成事業  基盤研究(C)

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    資金種別:競争的資金

    配分額:550000円 ( 直接経費:390000円 、 間接経費:160000円 )

    乳牛の分娩後2~3か月以内の人工授精による受胎率の低下の主な原因は、卵胞内卵子の受精・発育能の低下にあると考えられる。したがって、このような場合は、人工授精ではなく、むしろ、正常な胚を子宮内に移植することによって、受胎率の低下を防ぐことができるものと考えられる。そこで、生殖機能回復のモニタリングを行い、生殖機能の回復状況に基づいて、和牛胚の移植を行うことが、乳牛の分娩後における受胎率向上に有効かどうかを明らかにするために試験を行った。さらに、分娩後生殖機能回復モニタリングと、特に乾乳期から分娩後泌乳最盛期にかけての栄養状態のモニタリングを組み合わせた繁殖成績向上プログラム開発のための検討も行った。

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担当経験のある授業科目(researchmap)

  • 基礎農林学実習

    機関名:新潟大学

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  • 乳牛の生産と管理

    機関名:新潟大学

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  • 農場総合実習

    機関名:新潟大学

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  • 動物生産学実験実習Ⅰ

    機関名:新潟大学

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  • 動物生産学実験実習Ⅰ

    機関名:新潟大学

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  • 動物生産学演習Ⅰ

    機関名:新潟大学

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  • 企画提案型食づくりプロジェクト

    機関名:新潟大学

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  • 動物生産学実験実習Ⅱ

    機関名:新潟大学

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  • 農場総合実習

    機関名:新潟大学

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  • フィールド総合実験実習Ⅱ

    機関名:新潟大学

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  • 動物生産学実験実習Ⅰ

    機関名:新潟大学

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  • 乳牛の生産と管理

    機関名:新潟大学

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  • 動物生産学演習Ⅰ

    機関名:新潟大学

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  • 基礎農林学実習B

    機関名:新潟大学

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  • 研究者の仕事と生活

    機関名:新潟大学

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  • 動物のバイオサイエンス

    機関名:新潟大学

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  • 応用動物科学序説

    機関名:新潟大学

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  • フィールド総合演習Ⅰ

    機関名:新潟大学

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  • ファーミングシステム概論

    機関名:新潟大学

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  • 動物のバイオサイエンス

    機関名:新潟大学

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  • 研究者の仕事と生活

    機関名:新潟大学

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  • 動物生産学実験実習Ⅱ

    機関名:新潟大学

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  • 動物生産学実験実習Ⅰ

    機関名:新潟大学

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  • 動物生産学演習Ⅱ

    機関名:新潟大学

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  • 生物資源論

    機関名:新潟大学

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  • 基礎農林学実習A

    機関名:新潟大学

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  • 動物生産学実験実習Ⅰ

    機関名:新潟大学

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  • 基礎農林学実習

    機関名:新潟大学

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  • 基礎農林学実習

    機関名:新潟大学

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  • 基礎農林学実習A

    機関名:新潟大学

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  • 動物生産学実験実習Ⅰ

    機関名:新潟大学

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  • 乳牛の生産と管理

    機関名:新潟大学

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  • 動物生産学演習Ⅰ

    機関名:新潟大学

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  • 基礎農林学実習B

    機関名:新潟大学

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  • 研究者の仕事と生活

    機関名:新潟大学

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  • 基礎農林学実習

    機関名:新潟大学

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  • 基礎農林学実習

    機関名:新潟大学

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  • 基礎農林学実習

    機関名:新潟大学

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  • 基礎農林学実習

    機関名:新潟大学

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  • フィールド総合実験実習Ⅰ

    機関名:新潟大学

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  • 動物生産学実験実習Ⅱ

    機関名:新潟大学

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  • フィールド総合演習Ⅱ

    機関名:新潟大学

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  • 乳牛の生産と管理

    機関名:新潟大学

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  • 動物のバイオサイエンス

    機関名:新潟大学

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  • 実践型食づくりプロジェクト

    機関名:新潟大学

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  • 動物生産学演習Ⅱ

    機関名:新潟大学

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  • 動物生産学演習Ⅰ

    機関名:新潟大学

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  • 動物生産学演習Ⅱ

    機関名:新潟大学

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  • 生物資源論

    機関名:新潟大学

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  • 基礎農林学実習A

    機関名:新潟大学

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  • 動物生産学実験実習Ⅰ

    機関名:新潟大学

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  • 動物のバイオサイエンス

    機関名:新潟大学

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  • 動物生産学実験実習Ⅱ

    機関名:新潟大学

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  • 動物生産学演習Ⅱ

    機関名:新潟大学

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  • 動物生産学実験実習Ⅰ

    機関名:新潟大学

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  • 乳牛の生産と管理

    機関名:新潟大学

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  • 動物生産学演習Ⅰ

    機関名:新潟大学

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  • 基礎農林学実習B

    機関名:新潟大学

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  • 基礎農林学実習B

    機関名:新潟大学

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  • 基礎農林学実習A

    機関名:新潟大学

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  • 研究者の仕事と生活

    機関名:新潟大学

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  • 研究発表

    機関名:新潟大学

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  • 動物生産学実験実習Ⅱ

    機関名:新潟大学

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  • 動物生産学演習Ⅰ

    機関名:新潟大学

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  • 基礎農林学実習A

    機関名:新潟大学

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  • 基礎農林学実習B

    機関名:新潟大学

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  • 研究者の仕事と生活

    機関名:新潟大学

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  • 生命・食料科学セミナーAⅠ

    機関名:新潟大学

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  • 生命・食料科学特定研究AⅠ

    機関名:新潟大学

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  • 文献詳読Ⅰ

    機関名:新潟大学

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  • 研究発表演習(中間発表)

    機関名:新潟大学

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  • 乳牛の生産と管理

    機関名:新潟大学

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  • 基礎農林学実習

    機関名:新潟大学

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  • 動物生産学実験実習Ⅰ

    機関名:新潟大学

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  • 基礎農林学実習

    機関名:新潟大学

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  • 基礎農林学実習

    機関名:新潟大学

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  • フィールド総合実験実習Ⅰ

    機関名:新潟大学

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  • 基礎農林学実習A

    機関名:新潟大学

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  • 動物生産学実験実習Ⅱ

    機関名:新潟大学

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  • 動物のバイオサイエンス

    機関名:新潟大学

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  • 農場総合実習

    機関名:新潟大学

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  • 農業資源を知る

    機関名:新潟大学

     詳細を見る

  • 動物のバイオサイエンス

    機関名:新潟大学

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  • 応用動物科学序説

    機関名:新潟大学

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  • フィールド総合演習Ⅰ

    機関名:新潟大学

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  • ファーミングシステム概論

    機関名:新潟大学

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  • 研究者の仕事と生活

    機関名:新潟大学

     詳細を見る

  • 動物生産学演習Ⅱ

    機関名:新潟大学

     詳細を見る

  • 動物のバイオサイエンス

    機関名:新潟大学

     詳細を見る

  • 基礎農林学実習

    機関名:新潟大学

     詳細を見る

  • 基礎農林学実習A

    機関名:新潟大学

     詳細を見る

  • 動物のバイオサイエンス

    機関名:新潟大学

     詳細を見る

  • 基礎農林学実習B

    機関名:新潟大学

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  • 基礎農林学実習

    機関名:新潟大学

     詳細を見る

  • 基礎農林学実習B

    機関名:新潟大学

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  • 基礎農林学実習

    機関名:新潟大学

     詳細を見る

  • 動物生産学実験実習Ⅱ

    機関名:新潟大学

     詳細を見る

  • 乳牛の生産と管理

    機関名:新潟大学

     詳細を見る

  • 動物のバイオサイエンス

    機関名:新潟大学

     詳細を見る

  • 応用動物科学序説

    機関名:新潟大学

     詳細を見る

  • 研究者の仕事と生活

    機関名:新潟大学

     詳細を見る

  • 動物生産学実験実習Ⅰ

    機関名:新潟大学

     詳細を見る

  • 基礎農林学実習

    機関名:新潟大学

     詳細を見る

  • 動物生産学演習Ⅱ

    機関名:新潟大学

     詳細を見る

  • 動物生産学実験実習Ⅰ

    機関名:新潟大学

     詳細を見る

  • 乳牛の生産と管理

    機関名:新潟大学

     詳細を見る

  • 基礎農林学実習

    機関名:新潟大学

     詳細を見る

  • 基礎農林学実習

    機関名:新潟大学

     詳細を見る

  • 生命・食料科学セミナーAⅡ

    機関名:新潟大学

     詳細を見る

  • 動物生産学演習Ⅰ

    機関名:新潟大学

     詳細を見る

  • 生命・食料科学特定研究AⅡ

    機関名:新潟大学

     詳細を見る

  • 研究者の仕事と生活

    機関名:新潟大学

     詳細を見る

  • 文献詳読Ⅱ

    機関名:新潟大学

     詳細を見る

  • 研究発表演習(中間発表)

    機関名:新潟大学

     詳細を見る

  • 研究発表

    機関名:新潟大学

     詳細を見る

  • 動物のバイオサイエンス

    機関名:新潟大学

     詳細を見る

  • 動物生産学実験実習Ⅱ

    機関名:新潟大学

     詳細を見る

  • 動物生産学実験実習Ⅰ

    機関名:新潟大学

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  • 基礎農林学実習

    機関名:新潟大学

     詳細を見る

  • 基礎農林学実習

    機関名:新潟大学

     詳細を見る

  • 基礎農林学実習

    機関名:新潟大学

     詳細を見る

  • 基礎農林学実習

    機関名:新潟大学

     詳細を見る

  • 乳牛の生産と管理

    機関名:新潟大学

     詳細を見る

  • 動物生産学演習Ⅰ

    機関名:新潟大学

     詳細を見る

  • 基礎農林学実習B

    機関名:新潟大学

     詳細を見る

  • 研究者の仕事と生活

    機関名:新潟大学

     詳細を見る

  • 基礎農林学実習

    機関名:新潟大学

     詳細を見る

  • 基礎農林学実習

    機関名:新潟大学

     詳細を見る

  • フィールド総合演習Ⅱ

    機関名:新潟大学

     詳細を見る

  • 動物のバイオサイエンス

    機関名:新潟大学

     詳細を見る

  • 動物生産学実験実習Ⅱ

    機関名:新潟大学

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  • 動物生産学実験実習Ⅱ

    機関名:新潟大学

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担当経験のある授業科目

  • 動物生産学実験実習Ⅲ

    2020年
    -
    現在
    機関名:新潟大学

  • 動物生産学実験実習Ⅳ

    2020年
    -
    現在
    機関名:新潟大学

  • 乳牛生産管理学

    2019年
    -
    現在
    機関名:新潟大学

  • 新潟の農林業

    2019年
    -
    現在
    機関名:新潟大学

  • 動物衛生福祉学

    2019年
    -
    現在
    機関名:新潟大学

  • 牧場実習

    2019年
    -
    現在
    機関名:新潟大学

  • 農学入門Ⅰ

    2019年
    機関名:新潟大学

  • 農学入門Ⅱ

    2019年
    機関名:新潟大学

  • 農業資源を知る

    2018年
    -
    現在
    機関名:新潟大学

  • 動物生産学概論

    2018年
    -
    現在
    機関名:新潟大学

  • 基礎動植物生産学実験

    2018年
    -
    現在
    機関名:新潟大学

  • 文献詳読Ⅰ

    2015年
    機関名:新潟大学

  • 生命・食料科学セミナーAⅠ

    2015年
    機関名:新潟大学

  • 生命・食料科学特定研究AⅠ

    2015年
    機関名:新潟大学

  • 研究発表

    2014年
    -
    2015年
    機関名:新潟大学

  • 研究発表演習(中間発表)

    2014年
    -
    2015年
    機関名:新潟大学

  • 生命・食料科学セミナーAⅡ

    2014年
    機関名:新潟大学

  • 文献詳読Ⅱ

    2014年
    機関名:新潟大学

  • 生命・食料科学特定研究AⅡ

    2014年
    機関名:新潟大学

  • 基礎農林学実習A

    2012年
    -
    2018年
    機関名:新潟大学

  • 基礎農林学実習B

    2012年
    -
    2017年
    機関名:新潟大学

  • 生物資源論

    2012年
    -
    2013年
    機関名:新潟大学

  • 動物生産学演習Ⅱ

    2011年
    -
    現在
    機関名:新潟大学

  • 動物生産学演習Ⅰ

    2011年
    -
    現在
    機関名:新潟大学

  • 乳牛の生産と管理

    2010年
    -
    2018年
    機関名:新潟大学

  • 実践型食づくりプロジェクト

    2009年
    -
    2017年
    機関名:新潟大学

  • フィールド総合演習Ⅱ

    2009年
    -
    2010年
    機関名:新潟大学

  • フィールド総合実験実習Ⅱ

    2009年
    機関名:新潟大学

  • 企画提案型食づくりプロジェクト

    2009年
    機関名:新潟大学

  • 研究者の仕事と生活

    2008年
    -
    現在
    機関名:新潟大学

  • 動物生産学実験実習Ⅰ

    2008年
    -
    現在
    機関名:新潟大学

  • 動物生産学実験実習Ⅱ

    2008年
    -
    現在
    機関名:新潟大学

  • 動物のバイオサイエンス

    2008年
    -
    2018年
    機関名:新潟大学

  • 応用動物科学序説

    2008年
    -
    2010年
    機関名:新潟大学

  • フィールド総合演習Ⅰ

    2008年
    -
    2009年
    機関名:新潟大学

  • フィールド総合実験実習Ⅰ

    2008年
    -
    2009年
    機関名:新潟大学

  • ファーミングシステム概論

    2008年
    -
    2009年
    機関名:新潟大学

  • 基礎農林学実習

    2007年
    -
    現在
    機関名:新潟大学

  • 農場総合実習

    2007年
    -
    2009年
    機関名:新潟大学

▶ 全件表示