EFFECTS OF HEAT STRESS ON SEXUAL BEHAVIOR IN HEIFERS
High ambient temperatures affect the secretion of sexual hormones in cows and heifers. As a result, the frequency of silent estrus can reach a high level during summer. In order to analyze the effects of heat stress on sexual behavior in Black and White Romanian heifers, a research has been conducte...
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| Format: | Article |
| Language: | English |
| Published: |
Agroprint Timisoara
2023-10-01
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| Series: | Scientific Papers Animal Science and Biotechnologies |
| Subjects: | |
| Online Access: | https://spasb.ro/index.php/public_html/article/view/1201 |
| _version_ | 1797215576152604672 |
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| author | ELENA BOLOCAN |
| author_facet | ELENA BOLOCAN |
| author_sort | ELENA BOLOCAN |
| collection | DOAJ |
| description | High ambient temperatures affect the secretion of sexual hormones in cows and
heifers. As a result, the frequency of silent estrus can reach a high level during
summer. In order to analyze the effects of heat stress on sexual behavior in Black
and White Romanian heifers, a research has been conducted on four groups of
animals in the pre- and post-AI interval. During spring, in conditions of thermal
comfort and under the stimulating influence of increasing photoperiod, 83.3% of the
heifers showed clear signs of estrus. Exposure to temperatures of 36-42○C by day
and 21-31○C by night caused anoestrus: the heifers did not respond to repeated
estrus-induction treatment. When hot days (33-38○C) alternated with tolerable
temperatures by night (18-21○C), a normal expression of estrus was noticed in
16.7% of the animals, while 33.3% experienced weak estrus and 50% did not exhibit
sexual behavior. In conditions of moderate thermal stress, with peaks of daily
temperature ranging from 28 to 34○C, clear signs of estrus were detected in 25% of
the heifers and weak symptoms in 41.7%, while 33.3% had silent heat, clinically
diagnosed. The circadian profile of behavior changes in heat-stressed heifers, whose
sexual activity shifts to night time and to the early hours of the morning. |
| first_indexed | 2024-04-24T11:32:15Z |
| format | Article |
| id | doaj.art-a47ac5a575c041e0a76bf2db327bad2d |
| institution | Directory Open Access Journal |
| issn | 1841-9364 2344-4576 |
| language | English |
| last_indexed | 2024-04-24T11:32:15Z |
| publishDate | 2023-10-01 |
| publisher | Agroprint Timisoara |
| record_format | Article |
| series | Scientific Papers Animal Science and Biotechnologies |
| spelling | doaj.art-a47ac5a575c041e0a76bf2db327bad2d2024-04-10T08:28:31ZengAgroprint TimisoaraScientific Papers Animal Science and Biotechnologies1841-93642344-45762023-10-014211411411201EFFECTS OF HEAT STRESS ON SEXUAL BEHAVIOR IN HEIFERSELENA BOLOCAN0 Research and Development Institute for Bovine, Baloteşti, România High ambient temperatures affect the secretion of sexual hormones in cows and heifers. As a result, the frequency of silent estrus can reach a high level during summer. In order to analyze the effects of heat stress on sexual behavior in Black and White Romanian heifers, a research has been conducted on four groups of animals in the pre- and post-AI interval. During spring, in conditions of thermal comfort and under the stimulating influence of increasing photoperiod, 83.3% of the heifers showed clear signs of estrus. Exposure to temperatures of 36-42○C by day and 21-31○C by night caused anoestrus: the heifers did not respond to repeated estrus-induction treatment. When hot days (33-38○C) alternated with tolerable temperatures by night (18-21○C), a normal expression of estrus was noticed in 16.7% of the animals, while 33.3% experienced weak estrus and 50% did not exhibit sexual behavior. In conditions of moderate thermal stress, with peaks of daily temperature ranging from 28 to 34○C, clear signs of estrus were detected in 25% of the heifers and weak symptoms in 41.7%, while 33.3% had silent heat, clinically diagnosed. The circadian profile of behavior changes in heat-stressed heifers, whose sexual activity shifts to night time and to the early hours of the morning.https://spasb.ro/index.php/public_html/article/view/1201estrus behaviorheat stressheifers |
| spellingShingle | ELENA BOLOCAN EFFECTS OF HEAT STRESS ON SEXUAL BEHAVIOR IN HEIFERS Scientific Papers Animal Science and Biotechnologies estrus behavior heat stress heifers |
| title | EFFECTS OF HEAT STRESS ON SEXUAL BEHAVIOR IN HEIFERS |
| title_full | EFFECTS OF HEAT STRESS ON SEXUAL BEHAVIOR IN HEIFERS |
| title_fullStr | EFFECTS OF HEAT STRESS ON SEXUAL BEHAVIOR IN HEIFERS |
| title_full_unstemmed | EFFECTS OF HEAT STRESS ON SEXUAL BEHAVIOR IN HEIFERS |
| title_short | EFFECTS OF HEAT STRESS ON SEXUAL BEHAVIOR IN HEIFERS |
| title_sort | effects of heat stress on sexual behavior in heifers |
| topic | estrus behavior heat stress heifers |
| url | https://spasb.ro/index.php/public_html/article/view/1201 |
| work_keys_str_mv | AT elenabolocan effectsofheatstressonsexualbehaviorinheifers |