Effects of cortisol levels on reproductive success in cattle of different temperaments during fixed-time artificial insemination (FTAI)
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of Animal Behaviour and Biometeorology |
Texto Completo: | https://malque.pub/ojs/index.php/jabb/article/view/550 |
Resumo: | The present study was designed to assess the effect of stress on the reproductive performance of cattle. For this purpose, a total of 137 cows were divided into two groups: 65 belonging to the Azores Lydia breed and 72 crossing Aberdeen-Angus with Limousine, free of IBR, Chlamydia and BVD diseases and with a body condition score ranging from 2.75 to 4.0. Eight days before starting the experimental procedures, animals passed through the containment sleeve every other day for routine and human presence. For the synchronization protocol, a progesterone-impregnated controlled internal drug release (CIDR®) insert was placed intravaginally, and an injection of GnRH was given. After 7 days, PGF2α was administered, and the CIDR® was removed. Sixty hours after removal, cows were inseminated once after another injection of GnRH to induce ovulation, and pregnancy diagnosis was performed by ultrasonography 30 days after artificial insemination. Peripheral blood was collected in 5 ml tubes with a Z Serum Sep Clot Activator, and cortisol was measured using the IMMULITE 2000 Immunoassay System ®. Our results indicated significant differences (p≤0.05) in the cortisol levels among both groups (beef crossbred cows vs Azores Lydia) of 4.3±0.3 ng/dl and 5.8±0.4 ng/dl, respectively. The pregnancy results were also significantly different: 63.7% vs 45.6%, respectively, for beef crossbred and "Azores Lydia" cows. The present study clearly demonstrated a negative correlation between cortisol levels and pregnancy rates after fixed-time artificial insemination. The low levels of cortisol observed in the animals and particularly in the Azores Lydia breed, when compared to other studies carried out on these animals, must be due to the passage of the animals in the sleeve, allowing them to habituate to a routine, as well as to human presence. |
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Journal of Animal Behaviour and Biometeorology |
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Effects of cortisol levels on reproductive success in cattle of different temperaments during fixed-time artificial insemination (FTAI)Azores Lydia cattlecortisolpregnancy successstressThe present study was designed to assess the effect of stress on the reproductive performance of cattle. For this purpose, a total of 137 cows were divided into two groups: 65 belonging to the Azores Lydia breed and 72 crossing Aberdeen-Angus with Limousine, free of IBR, Chlamydia and BVD diseases and with a body condition score ranging from 2.75 to 4.0. Eight days before starting the experimental procedures, animals passed through the containment sleeve every other day for routine and human presence. For the synchronization protocol, a progesterone-impregnated controlled internal drug release (CIDR®) insert was placed intravaginally, and an injection of GnRH was given. After 7 days, PGF2α was administered, and the CIDR® was removed. Sixty hours after removal, cows were inseminated once after another injection of GnRH to induce ovulation, and pregnancy diagnosis was performed by ultrasonography 30 days after artificial insemination. Peripheral blood was collected in 5 ml tubes with a Z Serum Sep Clot Activator, and cortisol was measured using the IMMULITE 2000 Immunoassay System ®. Our results indicated significant differences (p≤0.05) in the cortisol levels among both groups (beef crossbred cows vs Azores Lydia) of 4.3±0.3 ng/dl and 5.8±0.4 ng/dl, respectively. The pregnancy results were also significantly different: 63.7% vs 45.6%, respectively, for beef crossbred and "Azores Lydia" cows. The present study clearly demonstrated a negative correlation between cortisol levels and pregnancy rates after fixed-time artificial insemination. The low levels of cortisol observed in the animals and particularly in the Azores Lydia breed, when compared to other studies carried out on these animals, must be due to the passage of the animals in the sleeve, allowing them to habituate to a routine, as well as to human presence.Malque Publishing2023-12-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionResearch Articlesapplication/pdfhttps://malque.pub/ojs/index.php/jabb/article/view/55010.31893/jabb.2024002Journal of Animal Behaviour and Biometeorology; Vol. 12 No. 1 (2024): January; 20240022318-12652318-1265reponame:Journal of Animal Behaviour and Biometeorologyinstname:Universidade Federal Rural do Semi-Árido (UFERSA)instacron:UFERSAenghttps://malque.pub/ojs/index.php/jabb/article/view/550/988Copyright (c) 2024 Malque Publishinghttps://creativecommons.org/licenses/by-nc-nd/4.0info:eu-repo/semantics/openAccessFaria, NunaPacheco-Lima, JoséMoreira da Silva, Maria HelenaBorba, A.Moreira da Silva, Joaquim Fernando2024-03-03T18:07:16Zoai:ojs2.malque.pub:article/550Revistahttps://periodicos.ufersa.edu.br/index.php/jabbPUBhttp://periodicos.ufersa.edu.br/revistas/index.php/jabb/oai||souza.jr@ufersa.edu.br2318-12652318-1265opendoar:2024-03-03T18:07:16Journal of Animal Behaviour and Biometeorology - Universidade Federal Rural do Semi-Árido (UFERSA)false |
dc.title.none.fl_str_mv |
Effects of cortisol levels on reproductive success in cattle of different temperaments during fixed-time artificial insemination (FTAI) |
title |
Effects of cortisol levels on reproductive success in cattle of different temperaments during fixed-time artificial insemination (FTAI) |
spellingShingle |
Effects of cortisol levels on reproductive success in cattle of different temperaments during fixed-time artificial insemination (FTAI) Faria, Nuna Azores Lydia cattle cortisol pregnancy success stress |
title_short |
Effects of cortisol levels on reproductive success in cattle of different temperaments during fixed-time artificial insemination (FTAI) |
title_full |
Effects of cortisol levels on reproductive success in cattle of different temperaments during fixed-time artificial insemination (FTAI) |
title_fullStr |
Effects of cortisol levels on reproductive success in cattle of different temperaments during fixed-time artificial insemination (FTAI) |
title_full_unstemmed |
Effects of cortisol levels on reproductive success in cattle of different temperaments during fixed-time artificial insemination (FTAI) |
title_sort |
Effects of cortisol levels on reproductive success in cattle of different temperaments during fixed-time artificial insemination (FTAI) |
author |
Faria, Nuna |
author_facet |
Faria, Nuna Pacheco-Lima, José Moreira da Silva, Maria Helena Borba, A. Moreira da Silva, Joaquim Fernando |
author_role |
author |
author2 |
Pacheco-Lima, José Moreira da Silva, Maria Helena Borba, A. Moreira da Silva, Joaquim Fernando |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Faria, Nuna Pacheco-Lima, José Moreira da Silva, Maria Helena Borba, A. Moreira da Silva, Joaquim Fernando |
dc.subject.por.fl_str_mv |
Azores Lydia cattle cortisol pregnancy success stress |
topic |
Azores Lydia cattle cortisol pregnancy success stress |
description |
The present study was designed to assess the effect of stress on the reproductive performance of cattle. For this purpose, a total of 137 cows were divided into two groups: 65 belonging to the Azores Lydia breed and 72 crossing Aberdeen-Angus with Limousine, free of IBR, Chlamydia and BVD diseases and with a body condition score ranging from 2.75 to 4.0. Eight days before starting the experimental procedures, animals passed through the containment sleeve every other day for routine and human presence. For the synchronization protocol, a progesterone-impregnated controlled internal drug release (CIDR®) insert was placed intravaginally, and an injection of GnRH was given. After 7 days, PGF2α was administered, and the CIDR® was removed. Sixty hours after removal, cows were inseminated once after another injection of GnRH to induce ovulation, and pregnancy diagnosis was performed by ultrasonography 30 days after artificial insemination. Peripheral blood was collected in 5 ml tubes with a Z Serum Sep Clot Activator, and cortisol was measured using the IMMULITE 2000 Immunoassay System ®. Our results indicated significant differences (p≤0.05) in the cortisol levels among both groups (beef crossbred cows vs Azores Lydia) of 4.3±0.3 ng/dl and 5.8±0.4 ng/dl, respectively. The pregnancy results were also significantly different: 63.7% vs 45.6%, respectively, for beef crossbred and "Azores Lydia" cows. The present study clearly demonstrated a negative correlation between cortisol levels and pregnancy rates after fixed-time artificial insemination. The low levels of cortisol observed in the animals and particularly in the Azores Lydia breed, when compared to other studies carried out on these animals, must be due to the passage of the animals in the sleeve, allowing them to habituate to a routine, as well as to human presence. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-12-30 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Research Articles |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://malque.pub/ojs/index.php/jabb/article/view/550 10.31893/jabb.2024002 |
url |
https://malque.pub/ojs/index.php/jabb/article/view/550 |
identifier_str_mv |
10.31893/jabb.2024002 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://malque.pub/ojs/index.php/jabb/article/view/550/988 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2024 Malque Publishing https://creativecommons.org/licenses/by-nc-nd/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2024 Malque Publishing https://creativecommons.org/licenses/by-nc-nd/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Malque Publishing |
publisher.none.fl_str_mv |
Malque Publishing |
dc.source.none.fl_str_mv |
Journal of Animal Behaviour and Biometeorology; Vol. 12 No. 1 (2024): January; 2024002 2318-1265 2318-1265 reponame:Journal of Animal Behaviour and Biometeorology instname:Universidade Federal Rural do Semi-Árido (UFERSA) instacron:UFERSA |
instname_str |
Universidade Federal Rural do Semi-Árido (UFERSA) |
instacron_str |
UFERSA |
institution |
UFERSA |
reponame_str |
Journal of Animal Behaviour and Biometeorology |
collection |
Journal of Animal Behaviour and Biometeorology |
repository.name.fl_str_mv |
Journal of Animal Behaviour and Biometeorology - Universidade Federal Rural do Semi-Árido (UFERSA) |
repository.mail.fl_str_mv |
||souza.jr@ufersa.edu.br |
_version_ |
1799319801999392768 |