Efficiency of Equilume light mask on the resumption of early estrous cyclicity and ovulation in Thoroughbred mares
Equilume light masks had no impact on hastening the resumption of estrous cyclicity in mares maintained in outdoor pastures on the mainland of Korea due to the cold weather conditions. Jeju Island is a major horse-breeding site in Korea and...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Korean Society of Animal Sciences and Technology
2022-01-01
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| Series: | Journal of Animal Science and Technology |
| Subjects: | |
| Online Access: | http://www.ejast.org/archive/view_article?pid=jast-64-1-1 |
| _version_ | 1818084926664212480 |
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| author | Seongmin Kim Heejun Jung Barbara Anne Murphy Minjung Yoon |
| author_facet | Seongmin Kim Heejun Jung Barbara Anne Murphy Minjung Yoon |
| author_sort | Seongmin Kim |
| collection | DOAJ |
| description | Equilume light masks had no impact on hastening the resumption of estrous
cyclicity in mares maintained in outdoor pastures on the mainland of Korea due
to the cold weather conditions. Jeju Island is a major horse-breeding site in
Korea and is warmer than the mainland during the winter season. Therefore, the
primary objective of this study was to explore the efficiency of the Equilume
light mask on the resumption of seasonal estrous cycles in Thoroughbred mares on
Jeju Island. A total of 20 nonpregnant mares were randomly divided into the
Equilume light mask (n = 9) and stable lighting (n =11) groups. The experiment
was performed at seven different horse-breeding farms located on Jeju Island
from November 15, 2020, to February 15, 2021. The mares were exposed to the
respective lights from 16:00 to 23:00. Follicle size and uterine edema were
measured by ultrasound scanning. Body condition scores (BCS) were also monitored
during the experiment. Statistical analysis was conducted using the SAS and SPSS
software, and p-values of < 0.05 were considered
statistically significant. Two of the nine (22.2%) mares in the Equilume light
mask group and three of the 11 (27.28%) mares in the stable lighting group were
still cycling in December and January, which were considered as all-year-round
cycling mares. On February 15, there was no difference between groups in the
resumption of early seasonal estrus cycle, which was determined by follicles
> 25 mm in addition to uterine edema. All mares in the Equilume light
mask group and five of the eight mares (62.5%) in the stable lighting group had
resumed cycling. Interestingly, six of the seven mares (87.5%) in the Equilume
light mask and four of eight mares (50%) in the stable lighting group had
already ovulated on February 15 (p > 0.05), as
determined by the presence of a recent corpus luteum. No difference was observed
in BCS and uterine edema between groups (p > 0.05). In
conclusion, the Equilume light mask can be an effective approach to induce early
seasonal estrus cycles of mares in Jeju Island, and it also enhances the
efficiency of farm management by reducing labor. |
| first_indexed | 2024-12-10T20:01:39Z |
| format | Article |
| id | doaj.art-e2706beea23a43fe90b079e50e16796d |
| institution | Directory Open Access Journal |
| issn | 2672-0191 2055-0391 |
| language | English |
| last_indexed | 2024-12-10T20:01:39Z |
| publishDate | 2022-01-01 |
| publisher | Korean Society of Animal Sciences and Technology |
| record_format | Article |
| series | Journal of Animal Science and Technology |
| spelling | doaj.art-e2706beea23a43fe90b079e50e16796d2022-12-22T01:35:31ZengKorean Society of Animal Sciences and TechnologyJournal of Animal Science and Technology2672-01912055-03912022-01-016411910.5187/jast.2021.e123jast-64-1-1Efficiency of Equilume light mask on the resumption of early estrous cyclicity and ovulation in Thoroughbred maresSeongmin Kim0Heejun Jung1Barbara Anne Murphy2Minjung Yoon3Department of Animal Science and Biotechnology, Kyungpook National University, Department of Animal Science and Biotechnology, Kyungpook National University, School of Agriculture and Food Science, University College Dublin, Department of Animal Science and Biotechnology, Kyungpook National University, Equilume light masks had no impact on hastening the resumption of estrous cyclicity in mares maintained in outdoor pastures on the mainland of Korea due to the cold weather conditions. Jeju Island is a major horse-breeding site in Korea and is warmer than the mainland during the winter season. Therefore, the primary objective of this study was to explore the efficiency of the Equilume light mask on the resumption of seasonal estrous cycles in Thoroughbred mares on Jeju Island. A total of 20 nonpregnant mares were randomly divided into the Equilume light mask (n = 9) and stable lighting (n =11) groups. The experiment was performed at seven different horse-breeding farms located on Jeju Island from November 15, 2020, to February 15, 2021. The mares were exposed to the respective lights from 16:00 to 23:00. Follicle size and uterine edema were measured by ultrasound scanning. Body condition scores (BCS) were also monitored during the experiment. Statistical analysis was conducted using the SAS and SPSS software, and p-values of < 0.05 were considered statistically significant. Two of the nine (22.2%) mares in the Equilume light mask group and three of the 11 (27.28%) mares in the stable lighting group were still cycling in December and January, which were considered as all-year-round cycling mares. On February 15, there was no difference between groups in the resumption of early seasonal estrus cycle, which was determined by follicles > 25 mm in addition to uterine edema. All mares in the Equilume light mask group and five of the eight mares (62.5%) in the stable lighting group had resumed cycling. Interestingly, six of the seven mares (87.5%) in the Equilume light mask and four of eight mares (50%) in the stable lighting group had already ovulated on February 15 (p > 0.05), as determined by the presence of a recent corpus luteum. No difference was observed in BCS and uterine edema between groups (p > 0.05). In conclusion, the Equilume light mask can be an effective approach to induce early seasonal estrus cycles of mares in Jeju Island, and it also enhances the efficiency of farm management by reducing labor.http://www.ejast.org/archive/view_article?pid=jast-64-1-1blue lightlight maskreproductionearly seasonal estrus cyclemarewelfare |
| spellingShingle | Seongmin Kim Heejun Jung Barbara Anne Murphy Minjung Yoon Efficiency of Equilume light mask on the resumption of early estrous cyclicity and ovulation in Thoroughbred mares Journal of Animal Science and Technology blue light light mask reproduction early seasonal estrus cycle mare welfare |
| title | Efficiency of Equilume light mask on the resumption of early estrous
cyclicity and ovulation in Thoroughbred mares |
| title_full | Efficiency of Equilume light mask on the resumption of early estrous
cyclicity and ovulation in Thoroughbred mares |
| title_fullStr | Efficiency of Equilume light mask on the resumption of early estrous
cyclicity and ovulation in Thoroughbred mares |
| title_full_unstemmed | Efficiency of Equilume light mask on the resumption of early estrous
cyclicity and ovulation in Thoroughbred mares |
| title_short | Efficiency of Equilume light mask on the resumption of early estrous
cyclicity and ovulation in Thoroughbred mares |
| title_sort | efficiency of equilume light mask on the resumption of early estrous cyclicity and ovulation in thoroughbred mares |
| topic | blue light light mask reproduction early seasonal estrus cycle mare welfare |
| url | http://www.ejast.org/archive/view_article?pid=jast-64-1-1 |
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