| Item type |
文献 / Documents(1) |
| 公開日 |
2023-03-03 |
| アクセス権 |
|
|
アクセス権 |
open access |
| 資源タイプ |
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|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 出版社版DOI |
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|
関連識別子 |
https://doi.org/10.5194/aab-59-45-2016 |
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|
関連名称 |
10.5194/aab-59-45-2016 |
| 出版タイプ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| タイトル |
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|
タイトル |
Effects of parity and season on pregnancy rates after the transfer of embryos to repeat-breeder Japanese Black beef cattle |
| タイトル別表記 |
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その他のタイトル |
Effects of parity and season on pregnancy rates to Japanese Black beef cattle |
| 著者 |
オノ
イソベ
モリタ
Do, L. T. K.
谷原, 史倫
タニグチ
タカギ
音井, 威重
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| 抄録 |
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内容記述 |
Repeat-breeder (RB) cows are a major source of economic waste due to their decreased fertility. Embryo transfer (ET) is an alternative tool to improve the fertility of RB cows. The aims of the present study were to evaluate the effects of recipient parity and the season on pregnancy rates following ET in RB Japanese Black beef cattle. Embryos were transferred nonsurgically to recipients, consisting of 155 heifers (< 2 years old) and 172 cows (< 8 years old), which were defined as RB cattle. Of the recipients that were presented for ET, 57 recipients received a fresh embryo and 270 recipients received a frozen embryo. There were no differences in the pregnancy rates between cattle that received fresh embryos or frozen embryos. The rates of recipients with pregnancy, abortion, stillbirth, and normal calving were similar between heifers and cows. In cows, the pregnancy rates were lower (P < 0.05) in summer (June to August) than in spring (March to May) and winter (December to February). In heifers, however, there were no differences in the pregnancy rates among the seasons. Our findings indicate that in RB Japanese Black beef cattle, the parity of the recipients does not have an effect on the pregnancy rates following the transfer of fresh and frozen embryos. However, heat stress may affect reproductive performance in RB Japanese Black cows. |
| 書誌情報 |
en : Archives Animal Breeding
巻 59,
号 1,
p. 45-49,
発行日 2016-01-26
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| 収録物ID |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
23639822 |
| 出版者 |
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出版者 |
Copernicus Publications |
| 権利情報 |
|
|
権利情報 |
This work is distributed under the Creative Commons Attribution 3.0 License. |
| EID |
|
|
識別子 |
392744 |
| 言語 |
|
|
言語 |
eng |
aab_59_1_45.pdf (94.7 KB)
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