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| Registros recuperados: 21 | |
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| Fukui, Yutaka; Yamamura, Kunio; Matsunaga, Nobuyoshi; Miyamoto, Akio; 福井, 豊; 宮本, 明夫. |
| The present study aimed to examine the possibility that bovine somatotropin (BST) treatment after artificial insemination (AI) may improve the fertility by the stimulation of corpus luteum (CL) function in seasonally anestrous ewes. The experiment was conducted at the Tawa Field Station, Shibecha-cho in Hokkaido, Japan, during the non-breeding season (May, 1995). Eighty-nine mature (2 to 3 years old) Suffolk and Suffolk-crossed ewes were treated with controlled internal drug release devices containing 0.3 g progesterone (CIDR-G) for 12 days. Ewes were injected intramuscularly with 500 IU PMSG the day before CIDR removal. Eighty-seven ewes were assigned to an insemination of frozen semen on a fixed-time basis (42 to 50 h) after removal of CIDR. On the 11th... |
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Palavras-chave: Bovine somatotropin; Artificial insemination; Progesterone; Conception rate; Ewes. |
| Ano: 2000 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2971 |
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| SUZUKI, Yo; WATANABE, Hiroyuki; FUKUI, Yutaka; 福井, 豊. |
| The aim of this study was to investigate whether seasonal changes affected in vitro developmental competence of porcine oocytes. The relationship between atmospheric temperature and embryonic development of in vitro matured porcine oocytes following intracytoplasmic sperm injection was examined throughout the year. The blastocyst rate (31.1%) in winter (mean atmospheric temperature during December to February: -3.8 C) was significantly higher (P<0.05) than those of other seasons in 2008/2009 (19.7-23.5%; 6.3-17.5 C). The monthly mean blastocyst rates were negatively correlated with the temperatures (r=-0.5944, P<0.05). The results of the present study suggest that porcine embryos could be produced throughout the year, but the in vitro production... |
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Palavras-chave: Embryonic development; Pig; Seasonal changes; Temperature. |
| Ano: 2010 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2814 |
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| FUKUI, Yutaka; KOHNO, Hirohide; OKABE, Kentaro; KATSUKI, Sara; YOSHIZAWA, Masahiro; TOGARI, Tetsuro; WATANABE, Hiroyuki; 福井, 豊. |
| In this study, two successive field trials were conducted during the non-breeding season to investigate various factors affecting on fertility of Suffolk ewes after intrauterine insemination with frozen-thawed semen. In the first year (Experiment 1), three sperm numbers per insemination dose (0.25, 0.5 and 1 million sperm) and five sheep farms were used, and in the second year (Experiment 2), parity, age, body weight, body condition score (BCS) and postpartum days were investigated to compare pregnancy and lambing rates. High pregnancy and lambing rates (70.6 and 70.6%, respectively) were obtained with 0.25 million sperm per dose. There were no significant differences in the pregnancy and lambing rates among the five farms, but there was a tendency for one... |
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Palavras-chave: Artificial insemination; Fertility; Frozen semen; Sheep. |
| Ano: 2010 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2817 |
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| Fukui, Yutaka; Fujii, Katsumi; Kumata, Mitsuru; Imai, Kei; Alfonso, Noel M.; Ono, Hitoshi; 福井, 豊; 藤井, 勝己; 久万田, 満; 今井, 敬; 小野, 斉. |
| Ano: 1986 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1500 |
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| BHUIYAN, Mohammad Musharraf Uddin; SUZUKI, Yo; WATANABE, Hiroyuki; LEE, Eunsong; HIRAYAMA, Hiroki; MATSUOKA, Koji; FUJISE, Yoshihiro; ISHIKAWA, Hajime; OHSUMI, Seiji; FUKUI, Yutaka; 福井, 豊. |
| The objectives of this study were to choose an effective embryo reconstruction method and an effective post-activation agent for in vitro production of sei whale (Balaenoptera borealis) interspecies somatic cell nuclear transfer (iSCNT) embryos. Moreover, trichostatin A (TSA) treatment of whale iSCNT embryos was performed to improve the in vitro embryo development. In Experiment 1, the fusion rate was significantly higher (88.1%) in embryos reconstructed using the intracytoplasmic cell injection method (ICI) than that (48.7%) in the subzonal cell insertion (SUZI) counterpart. The rates of pseudopronucleus (PPN) formation (77.4 vs. 77.2%) and cleavage (24.5 vs. 37.0%) did not vary between ICI and SUZI. However, the PPN formation and cleavage rates were... |
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Palavras-chave: Interspecies; Somatic cell nuclear transfer; Whale. |
| Ano: 2010 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2815 |
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| TETSUKA, Masafumi; ASADA, Masatsugu; MOGOE, Toshihiro; FUKUI, Yutaka; ISHIKAWA, Hajime; OHSUMI, Seiji; 手塚, 雅文; 福井, 豊. |
| This study describes the morphological and morphometrical changes associated with prepubertal ovarian development in the Antarctic minke whale (Balaenoptera bonaerensis). Ovaries were harvested from 94 immature minke whales caught in the Antarctic Ocean during the summer feeding season (December-March). Notable differences in ovarian size and morphology were found among animals. Up to 10 folds difference in ovarian weight was found among prepubertal whales of similar body size. During the prepubertal period, ovaries grew slowly and approximately doubled their weight. The morphologies of right and left ovaries were almost identical while the growth of the ovary appears to occur preferentially on the right side. The most striking morphological feature was... |
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Palavras-chave: Whale; Minke whale; Ovarian development. |
| Ano: 2004 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3034 |
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| 福井, 豊; 石黒, 明裕; 福島, 護之; 寺脇, 良悟; 小野, 斉; Fukui, Yutaka; Ishiguro, Akihiro; Fukushima, Moriyuki; Terawaki, Yoshinori; Ono, Hitoshi. |
| Ano: 1983 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1425 |
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| Registros recuperados: 21 | |
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