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Yuuki ISAJI, Hiroshi IMAI, Masayasu YAMADA
Session ID: OR1-1
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Satoshi Tsukamoto, Chieko Kishi, Tetsu Nishikawa, Naojiro Minami, Seij ...
Session ID: OR1-2
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Naoko KIMURA, Yasuko SATO, Yoshihito IUCHI, Hideyo SATO, Kiyoshi TOTSU ...
Session ID: OR1-3
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Tomomi ITO, Mao NIKAWA, Tomohiro SASANAMI
Session ID: OR1-4
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Gakushi KITO, Shinya ARAMAKI, Koji TANAKA, Tomoki SOH, Nobuhiko YAMAUC ...
Session ID: OR1-5
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Yumi HOSHINO, Yusuke SATO, Chizuka SAKAI, Eimei SATO
Session ID: OR1-6
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Yusuke SATO, Yumi HOSHINO, Chizuka SAKAI, Eimei SATO
Session ID: OR1-7
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Jibak LEE, Sugako OGUSHI, Michinori SAITOH, Tatsuya HIRANO
Session ID: OR1-8
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Masashi TAKAHASHI, Ken-ichi YAMANAKA, Balboula Ahmed, Miki SAKATANI, T ...
Session ID: OR1-9
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Mitsuhiro OTANI, Hiroshi IMAI, Masayasu YAMADA
Session ID: OR1-10
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Ahmed BALBOULA, Ken-ichi YAMANAKA, Miki SAKATANI, Masashi TAKAHASHI
Session ID: OR1-11
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Yamato MIZOBE, Mitsutoshi YOSHIDA, Kazuchika MIYOSHI
Session ID: OR1-12
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Shoichiro SEMBON, Koji YOSHIOKA, Dai-ichiro FUCHIMOTO, Masaki IWAMOTO, ...
Session ID: OR1-13
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Seung-Wook SHIN, Mikiko TOKORO, Satoshi NISHIKAWA, Hyang-Heun LEE, Yuk ...
Session ID: OR1-14
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
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Kazuhiko UEHARA, Hiromi OHTA
Session ID: OR1-15
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Toshihiro SAKURAI, Hanako BAI, Toshihiro KONNO, Hisashi ASO, Takahiro ...
Session ID: OR1-17
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Ayaka YANAGIDA, TaeSaeng CHOI, Kazuhiko IMAKAWA
Session ID: OR1-18
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
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Tomoyuki TSUKIYAMA, Ryota ASANO, Naojiro MINAMI, Masayasu YAMADA, Hiro ...
Session ID: OR1-19
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Mayako FUJIHARA, Sung Min KIM, Naojiro MINAMI, Masayasu YAMADA, Hirosh ...
Session ID: OR1-20
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Naoto Fukunaga, Toshiyuki Takehara, Takeshi Teramura, Miho Nakano, Sat ...
Session ID: OR1-21
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Syunsuke ITO, Toshiyuki TAKEHARA, SATOSHI KISHIGAMI, KAZUHIRO SAEKI, K ...
Session ID: OR1-22
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Hiroko KAWAMURA, Tomoko KAWAI, Yoshitomo TAGUCHI, Masayuki ANZAI, Hiro ...
Session ID: OR1-23
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Katsuhiro OHKOSHI, Atsuhiro TATEMIZO, Junichi MATSUDA, Fukashi INOUE, ...
Session ID: OR1-24
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Kazuhiro UMEYAMA, Masahito WATANABE, Hitomi MATSUNARI, Mayuko KUROME, ...
Session ID: OR1-25
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Hitomi MATSUNARI, Masahito WATANABE, Kazuhiro UMEYAMA, Kazuaki NAKANO, ...
Session ID: OR1-26
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Michiko NAKAI, Junya ITO, Ken-ichi SATO, Junko NOGUCHI, Hiroyuki KANEK ...
Session ID: OR1-27
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Manami MORI, Narumi OGONUKI, Kimiko INOUE, Keiji MOCHIDA, Akihiko OTA, ...
Session ID: OR1-28
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Narumi OGONUKI, Kimiko INOUE, Atsuo OGURA
Session ID: OR1-29
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Kimiko INOUE, Narumi OGONUKI, Takashi KOHDA, Takashi SADO, Fumitoshi I ...
Session ID: OR1-30
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Yukari TERASHITA, Satoshi SUGIMURA, Yusuke KUDO, Ryota AMANO, Yuki HIR ...
Session ID: OR1-31
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Takayuki YAMOCHI, Toshiyuki TAKEHARA, Syunsuke ITOU, Miho NAKANO, Sato ...
Session ID: OR1-32
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Yoshiko TSUJIMOTO, Satoshi KISHIGAMI, Toshiyuki TAKEHARA, Tomoko AMANO ...
Session ID: OR1-33
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Masahiro MORITA, Masayuki ANZAI, Yui NISHIYAMA, Hiromi KATO, Satoshi K ...
Session ID: OR1-34
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Atsushi FUKUDA, Feng CAO, Shinnosuke MORITA, Kaori YAMADA, Narumi OGON ...
Session ID: OR1-35
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Tomohiro KONO, Toshitaka TSUKADAIRA, Manabu KAWAHARA
Session ID: OR1-36
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Yayoi OBATA, Tomohiro KONO
Session ID: OR1-37
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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Ryouta KOBAYASHI, Nozomi TAKAHASHI, Akira OKAMOTO, Eito YAMAGUTI, Tomo ...
Session ID: OR1-38
Published: 2009
Released on J-STAGE: September 08, 2009
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MISAKO NAGAE
Session ID: OR2-1
Published: 2009
Released on J-STAGE: September 08, 2009
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Minoru SAKAGUCHI
Session ID: OR2-2
Published: 2009
Released on J-STAGE: September 08, 2009
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R.M.S.B.K. Ranasinghe, Toshihiko Nakao, Kyoji Yamada
Session ID: OR2-3
Published: 2009
Released on J-STAGE: September 08, 2009
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The objectives of the present study were to investigate the incidence of silent ovulation, to determine the factors affecting silent ovulation and to investigate its effects on reproduction of Holstein cows. Progesterone concentrations (P
4) in whole milk were measured by direct ELISA. Ovulation was considered to have occurred when a decline of P
4 to <1 ng/ml was followed by an increase of P
4 to >5 ng/ml in two consecutive samples. An increase of walking activity of more than 80% above the mean activity recorded for the previous two days was considered as estrus. Silent ovulation was defined when an ovulation defined by milk P
4 did not coincide with the increased pedometer measurements. Of 159 cows, 3.1%, 29.6%, 46.5%, 20.8% ovulated once, twice, thrice and four times within 90 d postpartum, respectively. The incidence of silent ovulation at first ovulation was 61.6%, followed by 24.7%, 19.6%, 9.1% at second, third and fourth ovulations, respectively. The incidences of silent ovulation at first and second ovulation postpartum were significantly affected by season (OR = 2.3 & 0.3 respectively). Cows with silent ovulation before AI within 90 d postpartum showed significantly longer intervals to first AI (69±13
vs. 57±7 d,
P = 0.01) and to conception (126±65
vs. 96±40 d,
P<0.05) compared to the cows that exhibited normal estrus. In conclusion, the incidences of silent ovulation at first and second ovulation postpartum were 61.6% and 24.7%, respectively and were affected by season. Silent ovulation during breeding period extended the intervals from calving to first AI and to conception.
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Michiko NOGUCHI, Koji YOSHIOKA, Chie SUZUKI, Sachiko ARAI, Seigo ITOH, ...
Session ID: OR2-4
Published: 2009
Released on J-STAGE: September 08, 2009
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Jahid ZABULI, Tomomi TANAKA, Wengeng LU, Satoko HARUNA, Hideo KAMOMAE
Session ID: OR2-5
Published: 2009
Released on J-STAGE: September 08, 2009
CONFERENCE PROCEEDINGS
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