Effect of temperature - humidity index on the onset of post- partum ovarian activity and reproductive behavior in Bos indicus cows
The effect of climatic factors on ovarian activity and reproductive behavior (RB) was evaluated in 46 cows kept under grazing conditions. Temperature-humidity index (THI) was used as an indicator of stress and divided in alert, damage and emergency levels. Fat thickness (FAT) was taken during the la...
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| Published in: | Animal reproduction Vol. 17; no. 1; p. e20190074 |
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| Abstract | The effect of climatic factors on ovarian activity and reproductive behavior (RB) was evaluated in 46
cows kept under grazing conditions. Temperature-humidity index (THI) was used as an indicator of stress and divided in alert, damage and emergency levels. Fat thickness (FAT) was taken during the last trimester of gestation (LTG) to approximately 90d postpartum (PP). At 30d PP animals received a progesterone (P
)-releasing device (CIDR) which was withdrawn 9d later. Ovarian activity was assessed by blood progesterone on days 21, 24, 27, 30, 49, 51, and 54 PP. Animals were divided into three groups, higher, and moderate RB and non-behavior. Sixty percent presented a THI >74 increasing dramatically from June to September up to >78. During LTG, animals lost 27% of their body reserves contrasting to PP where an increase of 2.6% (P=0.002) was observed. The percentages of cyclic and non-cyclic animals were 57 and 43%, respectively (P> 0.05). Seventy-two percent displayed RB and 28% were non-behavior (P<0.05). A negative correlation (r = -0.307; P = 0.038) between THI and RB, and a positive correlation (r = 0.427; P = 0.003) between the onset of ovarian activity and RB were observed. Differences in THI during the LTG (P<0.01) were observed between cyclic and non-cyclic animals. Non-behavior cows in the LTG had a higher THI (P <0.05). High levels of THI have a negative effect on the resumption of ovarian activity and RB in
especially if high THI occurs during the last trimester of gestation. |
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| AbstractList | The effect of climatic factors on ovarian activity and reproductive behavior (RB) was evaluated in 46
cows kept under grazing conditions. Temperature-humidity index (THI) was used as an indicator of stress and divided in alert, damage and emergency levels. Fat thickness (FAT) was taken during the last trimester of gestation (LTG) to approximately 90d postpartum (PP). At 30d PP animals received a progesterone (P
)-releasing device (CIDR) which was withdrawn 9d later. Ovarian activity was assessed by blood progesterone on days 21, 24, 27, 30, 49, 51, and 54 PP. Animals were divided into three groups, higher, and moderate RB and non-behavior. Sixty percent presented a THI >74 increasing dramatically from June to September up to >78. During LTG, animals lost 27% of their body reserves contrasting to PP where an increase of 2.6% (P=0.002) was observed. The percentages of cyclic and non-cyclic animals were 57 and 43%, respectively (P> 0.05). Seventy-two percent displayed RB and 28% were non-behavior (P<0.05). A negative correlation (r = -0.307; P = 0.038) between THI and RB, and a positive correlation (r = 0.427; P = 0.003) between the onset of ovarian activity and RB were observed. Differences in THI during the LTG (P<0.01) were observed between cyclic and non-cyclic animals. Non-behavior cows in the LTG had a higher THI (P <0.05). High levels of THI have a negative effect on the resumption of ovarian activity and RB in
especially if high THI occurs during the last trimester of gestation. The effect of climatic factors on ovarian activity and reproductive behavior (RB) was evaluated in 46 Bos indicus cows kept under grazing conditions. Temperature-humidity index (THI) was used as an indicator of stress and divided in alert, damage and emergency levels. Fat thickness (FAT) was taken during the last trimester of gestation (LTG) to approximately 90d postpartum (PP). At 30d PP animals received a progesterone (P 4 )-releasing device (CIDR) which was withdrawn 9d later. Ovarian activity was assessed by blood progesterone on days 21, 24, 27, 30, 49, 51, and 54 PP. Animals were divided into three groups, higher, and moderate RB and non-behavior. Sixty percent presented a THI >74 increasing dramatically from June to September up to >78. During LTG, animals lost 27% of their body reserves contrasting to PP where an increase of 2.6% (P=0.002) was observed. The percentages of cyclic and non-cyclic animals were 57 and 43%, respectively (P> 0.05). Seventy-two percent displayed RB and 28% were non-behavior (P<0.05). A negative correlation (r = -0.307; P = 0.038) between THI and RB, and a positive correlation (r = 0.427; P = 0.003) between the onset of ovarian activity and RB were observed. Differences in THI during the LTG (P<0.01) were observed between cyclic and non-cyclic animals. Non-behavior cows in the LTG had a higher THI (P <0.05). High levels of THI have a negative effect on the resumption of ovarian activity and RB in Bos indicus especially if high THI occurs during the last trimester of gestation. Abstract The effect of climatic factors on ovarian activity and reproductive behavior (RB) was evaluated in 46 Bos indicus cows kept under grazing conditions. Temperature-humidity index (THI) was used as an indicator of stress and divided in alert, damage and emergency levels. Fat thickness (FAT) was taken during the last trimester of gestation (LTG) to approximately 90d postpartum (PP). At 30d PP animals received a progesterone (P4)-releasing device (CIDR) which was withdrawn 9d later. Ovarian activity was assessed by blood progesterone on days 21, 24, 27, 30, 49, 51, and 54 PP. Animals were divided into three groups, higher, and moderate RB and non-behavior. Sixty percent presented a THI >74 increasing dramatically from June to September up to >78. During LTG, animals lost 27% of their body reserves contrasting to PP where an increase of 2.6% (P=0.002) was observed. The percentages of cyclic and non-cyclic animals were 57 and 43%, respectively (P> 0.05). Seventy-two percent displayed RB and 28% were non-behavior (P<0.05). A negative correlation (r = -0.307; P = 0.038) between THI and RB, and a positive correlation (r = 0.427; P = 0.003) between the onset of ovarian activity and RB were observed. Differences in THI during the LTG (P<0.01) were observed between cyclic and non-cyclic animals. Non-behavior cows in the LTG had a higher THI (P <0.05). High levels of THI have a negative effect on the resumption of ovarian activity and RB in Bos indicus especially if high THI occurs during the last trimester of gestation. |
| Author | Galina, Carlos Salvador Aceves, Lorenzo Armando Pablos, Jose Luis Díaz, Ramiro Fernando Sánchez, Jaime Gallegos Aranda, Emilio Manuel |
| AuthorAffiliation | Universidad San Francisco de Quito Universidad Nacional Autónoma de México Colegio de Postgraduados |
| AuthorAffiliation_xml | – name: Universidad Nacional Autónoma de México – name: Universidad San Francisco de Quito – name: Colegio de Postgraduados |
| Author_xml | – sequence: 1 givenname: Ramiro Fernando orcidid: 0000-0001-5866-3649 surname: Díaz fullname: Díaz, Ramiro Fernando organization: Escuela de Medicina Veterinaria, Universidad San Francisco de Quito, Quito, Ecuador – sequence: 2 givenname: Carlos Salvador orcidid: 0000-0002-1020-7027 surname: Galina fullname: Galina, Carlos Salvador organization: Departamento de Reproducción, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Ciudad de México, México – sequence: 3 givenname: Emilio Manuel orcidid: 0000-0003-2536-8541 surname: Aranda fullname: Aranda, Emilio Manuel organization: Colegio de Postgraduados, Campus Tabasco, Tabasco, México – sequence: 4 givenname: Lorenzo Armando orcidid: 0000-0002-9301-9223 surname: Aceves fullname: Aceves, Lorenzo Armando organization: Colegio de Postgraduados, Campus Tabasco, Tabasco, México – sequence: 5 givenname: Jaime Gallegos surname: Sánchez fullname: Sánchez, Jaime Gallegos organization: Colegio de Postgraduados, Campus Montecillo, Montecillo, México – sequence: 6 givenname: Jose Luis orcidid: 0000-0002-7153-4099 surname: Pablos fullname: Pablos, Jose Luis organization: Departamento de Genética y Bioestadística, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Ciudad de México, México |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/32399065$$D View this record in MEDLINE/PubMed |
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| Issue | 1 |
| Keywords | fat thickness beef cows reproductive cyclicity natural mating temperature-humidity index |
| Language | English |
| License | Copyright © The Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. This work is licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0 |
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| Notes | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Conflict of interest: The authors have no conflict of interest to declare. Author contributions RFD: Conceptualization, Writing – original draft, Writing – review & editing; CSG: Conceptualization, Writing – review & editing; EMA: Supervision; LAA: Data curation, Methodology; JGS: Supervision; JLP: Data curation, Formal analysis. |
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Aimone, AM – volume: 43 start-page: 597 issue: 3 year: 2011 end-page: 601 article-title: Effect of climate factors on conception rate of lactating dairy cows in Mexico publication-title: Trop Anim Health Prod contributor: fullname: Villa-Mancera, A; Méndez-Mendoza, M; Huerta-Crispín, R; Vázquez-Flores, F; Córdova-Izquierdo, A |
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| Snippet | The effect of climatic factors on ovarian activity and reproductive behavior (RB) was evaluated in 46
cows kept under grazing conditions. Temperature-humidity... The effect of climatic factors on ovarian activity and reproductive behavior (RB) was evaluated in 46 Bos indicus cows kept under grazing conditions.... Abstract The effect of climatic factors on ovarian activity and reproductive behavior (RB) was evaluated in 46 Bos indicus cows kept under grazing conditions.... |
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| SubjectTerms | BIOTECHNOLOGY & APPLIED MICROBIOLOGY Original |
| Title | Effect of temperature - humidity index on the onset of post- partum ovarian activity and reproductive behavior in Bos indicus cows |
| URI | https://www.ncbi.nlm.nih.gov/pubmed/32399065 https://search.proquest.com/docview/2402432495 https://pubmed.ncbi.nlm.nih.gov/PMC7212737 http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-31432020000100207&lng=en&tlng=en |
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