Testosterone serum profile, semen characteristics and testicular biometry of Mangalarga Marchador stallions in a tropical environment
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | LOCUS Repositório Institucional da UFV |
Texto Completo: | https://doi.org/10.1111/rda.12918 http://www.locus.ufv.br/handle/123456789/13193 |
Resumo: | This study was conducted to characterize the daily profile of testosterone secretion and its mean concentrations in the four seasons as well as to evaluate the semen characteristics and testicular biometry of Mangalarga Marchador stallions throughout the year in a tropical region. Three stallions were submitted to semen collections and evaluation of testicular biometry every 14 days along a year. Blood samples were collected once at the middle of each season, in a 20-min interval during 24 hr in order to evaluate the testosterone secretion profiles among seasons. Testosterone concentrations along the day were higher at the beginning of the afternoon (from 12:00 to 15:00 hr), but a circadian secretion was not clearly observed. Mean testosterone concentrations did not differ among seasons (p > .05), but a pattern of secretion along the day showed variations with higher concentrations in the afternoon during the winter. Ejaculate volume was higher during summer; however, sperm motility decreased in summer and spring. Total sperm in ejaculate, sperm morphology and testicular biometry kept constant along the year showing no differences among the seasons. The results demonstrated that in a tropical region, reproductive aspects of stallions did not show a clearly defined seasonal variation, and months of autumn and winter were not unsuitable for reproduction of the males. |
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Waddington, BPenitente-Filho, JMNeves, JGSPinho, ROChaya, AYMaitan, PPSilveira, CONeves, MGGuimarães, SEFCarvalho, GR deGuimarães, JD2017-11-17T12:24:11Z2017-11-17T12:24:11Z2016-11-3014390531https://doi.org/10.1111/rda.12918http://www.locus.ufv.br/handle/123456789/13193This study was conducted to characterize the daily profile of testosterone secretion and its mean concentrations in the four seasons as well as to evaluate the semen characteristics and testicular biometry of Mangalarga Marchador stallions throughout the year in a tropical region. Three stallions were submitted to semen collections and evaluation of testicular biometry every 14 days along a year. Blood samples were collected once at the middle of each season, in a 20-min interval during 24 hr in order to evaluate the testosterone secretion profiles among seasons. Testosterone concentrations along the day were higher at the beginning of the afternoon (from 12:00 to 15:00 hr), but a circadian secretion was not clearly observed. Mean testosterone concentrations did not differ among seasons (p > .05), but a pattern of secretion along the day showed variations with higher concentrations in the afternoon during the winter. Ejaculate volume was higher during summer; however, sperm motility decreased in summer and spring. Total sperm in ejaculate, sperm morphology and testicular biometry kept constant along the year showing no differences among the seasons. The results demonstrated that in a tropical region, reproductive aspects of stallions did not show a clearly defined seasonal variation, and months of autumn and winter were not unsuitable for reproduction of the males.engReproduction in Domestic AnimalsVolume 52, Issue 2, Pages 335–343, April 2017TestosteroneMangalarga MarchadorTestosterone serum profile, semen characteristics and testicular biometry of Mangalarga Marchador stallions in a tropical environmentinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfinfo:eu-repo/semantics/openAccessreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFVORIGINALWaddington_et_al-2017-Reproduction_in_Domestic_Animals.pdfWaddington_et_al-2017-Reproduction_in_Domestic_Animals.pdfTexto completoapplication/pdf620514https://locus.ufv.br//bitstream/123456789/13193/1/Waddington_et_al-2017-Reproduction_in_Domestic_Animals.pdf6ee576f540f4bb48fee3e226eb52b61fMD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81748https://locus.ufv.br//bitstream/123456789/13193/2/license.txt8a4605be74aa9ea9d79846c1fba20a33MD52THUMBNAILWaddington_et_al-2017-Reproduction_in_Domestic_Animals.pdf.jpgWaddington_et_al-2017-Reproduction_in_Domestic_Animals.pdf.jpgIM Thumbnailimage/jpeg6446https://locus.ufv.br//bitstream/123456789/13193/3/Waddington_et_al-2017-Reproduction_in_Domestic_Animals.pdf.jpg7179fadcb1e9dcbdd16962095dbe5436MD53123456789/131932017-11-17 22:00:52.329oai:locus.ufv.br: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Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452017-11-18T01:00:52LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false |
dc.title.en.fl_str_mv |
Testosterone serum profile, semen characteristics and testicular biometry of Mangalarga Marchador stallions in a tropical environment |
title |
Testosterone serum profile, semen characteristics and testicular biometry of Mangalarga Marchador stallions in a tropical environment |
spellingShingle |
Testosterone serum profile, semen characteristics and testicular biometry of Mangalarga Marchador stallions in a tropical environment Waddington, B Testosterone Mangalarga Marchador |
title_short |
Testosterone serum profile, semen characteristics and testicular biometry of Mangalarga Marchador stallions in a tropical environment |
title_full |
Testosterone serum profile, semen characteristics and testicular biometry of Mangalarga Marchador stallions in a tropical environment |
title_fullStr |
Testosterone serum profile, semen characteristics and testicular biometry of Mangalarga Marchador stallions in a tropical environment |
title_full_unstemmed |
Testosterone serum profile, semen characteristics and testicular biometry of Mangalarga Marchador stallions in a tropical environment |
title_sort |
Testosterone serum profile, semen characteristics and testicular biometry of Mangalarga Marchador stallions in a tropical environment |
author |
Waddington, B |
author_facet |
Waddington, B Penitente-Filho, JM Neves, JGS Pinho, RO Chaya, AY Maitan, PP Silveira, CO Neves, MG Guimarães, SEF Carvalho, GR de Guimarães, JD |
author_role |
author |
author2 |
Penitente-Filho, JM Neves, JGS Pinho, RO Chaya, AY Maitan, PP Silveira, CO Neves, MG Guimarães, SEF Carvalho, GR de Guimarães, JD |
author2_role |
author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Waddington, B Penitente-Filho, JM Neves, JGS Pinho, RO Chaya, AY Maitan, PP Silveira, CO Neves, MG Guimarães, SEF Carvalho, GR de Guimarães, JD |
dc.subject.pt-BR.fl_str_mv |
Testosterone Mangalarga Marchador |
topic |
Testosterone Mangalarga Marchador |
description |
This study was conducted to characterize the daily profile of testosterone secretion and its mean concentrations in the four seasons as well as to evaluate the semen characteristics and testicular biometry of Mangalarga Marchador stallions throughout the year in a tropical region. Three stallions were submitted to semen collections and evaluation of testicular biometry every 14 days along a year. Blood samples were collected once at the middle of each season, in a 20-min interval during 24 hr in order to evaluate the testosterone secretion profiles among seasons. Testosterone concentrations along the day were higher at the beginning of the afternoon (from 12:00 to 15:00 hr), but a circadian secretion was not clearly observed. Mean testosterone concentrations did not differ among seasons (p > .05), but a pattern of secretion along the day showed variations with higher concentrations in the afternoon during the winter. Ejaculate volume was higher during summer; however, sperm motility decreased in summer and spring. Total sperm in ejaculate, sperm morphology and testicular biometry kept constant along the year showing no differences among the seasons. The results demonstrated that in a tropical region, reproductive aspects of stallions did not show a clearly defined seasonal variation, and months of autumn and winter were not unsuitable for reproduction of the males. |
publishDate |
2016 |
dc.date.issued.fl_str_mv |
2016-11-30 |
dc.date.accessioned.fl_str_mv |
2017-11-17T12:24:11Z |
dc.date.available.fl_str_mv |
2017-11-17T12:24:11Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://doi.org/10.1111/rda.12918 http://www.locus.ufv.br/handle/123456789/13193 |
dc.identifier.issn.none.fl_str_mv |
14390531 |
identifier_str_mv |
14390531 |
url |
https://doi.org/10.1111/rda.12918 http://www.locus.ufv.br/handle/123456789/13193 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartofseries.pt-BR.fl_str_mv |
Volume 52, Issue 2, Pages 335–343, April 2017 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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Reproduction in Domestic Animals |
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Reproduction in Domestic Animals |
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