Body and testicular development and serum testosterone concentrations in Brahman males

Detalhes bibliográficos
Autor(a) principal: Chacur, Marcelo George Mungai
Data de Publicação: 2017
Outros Autores: Miyasaki, Alex Arikawa, Oba, Eunice, Souza, Camila Dutra, Gabriel Filho, Luis Roberto Almeida
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Semina. Ciências Agrárias (Online)
Texto Completo: https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/27401
Resumo: The present study had the objective of evaluating the physical and testicular development, and the serum testosterone concentration of 8 to 18 months old male Brahman cattle on grazing weight gaining performance tests. Bovine cattle (n=40), aged 259.76 ± 26.15 days and weighing 239.71 ± 33,94kg had the following characteristics evaluated every 56 days, corresponding to 8, 10, 12, 14, 16, and 18 months of age (six different data collections): body weight (BW), scrotal circumference (SC), girth (G), height at the withers (WH), body length (BL), body mass index (BMI), right and left testicular length (RTL and LTL, respectively), right and left testicular height (RTH and LTH, respectively), average daily weight gain (ADG), testicular volume (TV), and serum testosterone (ST).Analysis of variance and Tukey's test at 5% probability were used. Correlations between variables were assessed using Pearson's method at 5% confidence. There was significant difference (P < 0.05) from 12 months of age onwards for ADG and ST. There were differences (P < 0.05) for: BW, SC, G, WH, BL, BMI, RTL, LTL, RTH,and TV from 14 months of age. There was a positive correlation between: ST x G (r=0.38; P < 0.01); ST x WH (r=0.38; P < 0.01); ST xRTH (r=0.23; P < 0.05); ST x LTH (r=0.21; P < 0.01); ST x TV (r=0.22; P < 0.008); TV x weight (r=0.70; P < 0.01); TV x SC (r=0.90; P < 0.01); and TV x BMI (r=0.93; P < 0.01). A rapid increase in serum testosterone concentration occurred between 12 and 14 months of age, followed by rapid body and testicular growth. An elevation in testosterone levels is an indirect indicator that an acceleration inphysical and testicular growth is approaching. It is recommended to calculate both BMI and TV to follow cattle growth due to the high correlation between these variables.
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spelling Body and testicular development and serum testosterone concentrations in Brahman malesDesenvolvimento corpóreo, testicular e concentrações séricas de testosterona em machos BrahmanAndrogenMale zebuBody morphometryTestes.AndrógenoMacho zebuMorfometria corpóreaTestículo.The present study had the objective of evaluating the physical and testicular development, and the serum testosterone concentration of 8 to 18 months old male Brahman cattle on grazing weight gaining performance tests. Bovine cattle (n=40), aged 259.76 ± 26.15 days and weighing 239.71 ± 33,94kg had the following characteristics evaluated every 56 days, corresponding to 8, 10, 12, 14, 16, and 18 months of age (six different data collections): body weight (BW), scrotal circumference (SC), girth (G), height at the withers (WH), body length (BL), body mass index (BMI), right and left testicular length (RTL and LTL, respectively), right and left testicular height (RTH and LTH, respectively), average daily weight gain (ADG), testicular volume (TV), and serum testosterone (ST).Analysis of variance and Tukey's test at 5% probability were used. Correlations between variables were assessed using Pearson's method at 5% confidence. There was significant difference (P < 0.05) from 12 months of age onwards for ADG and ST. There were differences (P < 0.05) for: BW, SC, G, WH, BL, BMI, RTL, LTL, RTH,and TV from 14 months of age. There was a positive correlation between: ST x G (r=0.38; P < 0.01); ST x WH (r=0.38; P < 0.01); ST xRTH (r=0.23; P < 0.05); ST x LTH (r=0.21; P < 0.01); ST x TV (r=0.22; P < 0.008); TV x weight (r=0.70; P < 0.01); TV x SC (r=0.90; P < 0.01); and TV x BMI (r=0.93; P < 0.01). A rapid increase in serum testosterone concentration occurred between 12 and 14 months of age, followed by rapid body and testicular growth. An elevation in testosterone levels is an indirect indicator that an acceleration inphysical and testicular growth is approaching. It is recommended to calculate both BMI and TV to follow cattle growth due to the high correlation between these variables.Objetivou-se estudar o desenvolvimento corpóreo, testicular e a concentração sérica de testosterona dos 8 aos 18 meses de idade de machos Brahman em prova de ganho de peso à pasto. Os bovinos (n=40) com idade de 259,76±26,15 dias e peso de 239,71±33,94kg, foram avaliados a cada 56 dias, em seis momentos, respectivamente, aos 8, 10, 12, 14, 16 e 18 meses de idade para: peso corpóreo (PC), circunferência escrotal (CE), perímetro torácico (PT), altura de cernelha (HC), comprimento corporal (CC), índice de massa corpórea (IMC), comprimento testicular direito (CTD) e esquerdo (CTE), altura testicular direita (HTD) e esquerda (HTE), ganho médio diário de peso corpóreo (GMD), volume testicular (VT) e concentração sérica de testosterona (TES).Utilizou-se a análise de variância, seguida por Tukey a 5%. Para as correlações entre variáveis se empregou o método de Pearson a 5%. Houve diferença (P < 0,05) dos 12 meses de idade em diante para GMD e TES. Houve diferenças (P < 0,05) para: PC, CE, PT, HC, CC, IMC, CTD, CTE, HTD e VT à partir de 14 meses de idade. Houve correlações positivas entre: TES x PT (r = 0,38; P < 0,01); TES x HC (r = 0,38; P < 0,01); TES x HTD (r = 0,23; P < 0,05); TES x HTE (r = 0,21; P < 0,01); TES x VT (r = 0,22; P < 0,008) e do VT x peso (r = 0,70; P < 0,01); VT x CE (r = 0,90; P < 0,01) e VT x IMC (r = 0,93; P < 0,01). A elevação rápida da concentração sérica de testosterona ocorreu entre 12 e 14 meses de idade. Houve rápido crescimento corpóreo e dos testículos após a elevação significativa de testosterona. A elevação da testosterona, de forma indireta, indica a proximidade da aceleração do crescimento corpóreo e testicular. Recomenda-se calcular o índice de massa corpórea e o volume testicular para acompanhar o crescimento dos bovinos, devido à alta correlação entre essas variáveis.UEL2017-08-25info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/2740110.5433/1679-0359.2017v38n4Supl1p2561Semina: Ciências Agrárias; Vol. 38 No. 4Supl1 (2017); 2561-2580Semina: Ciências Agrárias; v. 38 n. 4Supl1 (2017); 2561-25801679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELenghttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/27401/21591Copyright (c) 2017 Semina: Ciências Agráriashttp://creativecommons.org/licenses/by-nc/4.0info:eu-repo/semantics/openAccessChacur, Marcelo George MungaiMiyasaki, Alex ArikawaOba, EuniceSouza, Camila DutraGabriel Filho, Luis Roberto Almeida2022-10-21T15:48:43Zoai:ojs.pkp.sfu.ca:article/27401Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2022-10-21T15:48:43Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false
dc.title.none.fl_str_mv Body and testicular development and serum testosterone concentrations in Brahman males
Desenvolvimento corpóreo, testicular e concentrações séricas de testosterona em machos Brahman
title Body and testicular development and serum testosterone concentrations in Brahman males
spellingShingle Body and testicular development and serum testosterone concentrations in Brahman males
Chacur, Marcelo George Mungai
Androgen
Male zebu
Body morphometry
Testes.
Andrógeno
Macho zebu
Morfometria corpórea
Testículo.
title_short Body and testicular development and serum testosterone concentrations in Brahman males
title_full Body and testicular development and serum testosterone concentrations in Brahman males
title_fullStr Body and testicular development and serum testosterone concentrations in Brahman males
title_full_unstemmed Body and testicular development and serum testosterone concentrations in Brahman males
title_sort Body and testicular development and serum testosterone concentrations in Brahman males
author Chacur, Marcelo George Mungai
author_facet Chacur, Marcelo George Mungai
Miyasaki, Alex Arikawa
Oba, Eunice
Souza, Camila Dutra
Gabriel Filho, Luis Roberto Almeida
author_role author
author2 Miyasaki, Alex Arikawa
Oba, Eunice
Souza, Camila Dutra
Gabriel Filho, Luis Roberto Almeida
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Chacur, Marcelo George Mungai
Miyasaki, Alex Arikawa
Oba, Eunice
Souza, Camila Dutra
Gabriel Filho, Luis Roberto Almeida
dc.subject.por.fl_str_mv Androgen
Male zebu
Body morphometry
Testes.
Andrógeno
Macho zebu
Morfometria corpórea
Testículo.
topic Androgen
Male zebu
Body morphometry
Testes.
Andrógeno
Macho zebu
Morfometria corpórea
Testículo.
description The present study had the objective of evaluating the physical and testicular development, and the serum testosterone concentration of 8 to 18 months old male Brahman cattle on grazing weight gaining performance tests. Bovine cattle (n=40), aged 259.76 ± 26.15 days and weighing 239.71 ± 33,94kg had the following characteristics evaluated every 56 days, corresponding to 8, 10, 12, 14, 16, and 18 months of age (six different data collections): body weight (BW), scrotal circumference (SC), girth (G), height at the withers (WH), body length (BL), body mass index (BMI), right and left testicular length (RTL and LTL, respectively), right and left testicular height (RTH and LTH, respectively), average daily weight gain (ADG), testicular volume (TV), and serum testosterone (ST).Analysis of variance and Tukey's test at 5% probability were used. Correlations between variables were assessed using Pearson's method at 5% confidence. There was significant difference (P < 0.05) from 12 months of age onwards for ADG and ST. There were differences (P < 0.05) for: BW, SC, G, WH, BL, BMI, RTL, LTL, RTH,and TV from 14 months of age. There was a positive correlation between: ST x G (r=0.38; P < 0.01); ST x WH (r=0.38; P < 0.01); ST xRTH (r=0.23; P < 0.05); ST x LTH (r=0.21; P < 0.01); ST x TV (r=0.22; P < 0.008); TV x weight (r=0.70; P < 0.01); TV x SC (r=0.90; P < 0.01); and TV x BMI (r=0.93; P < 0.01). A rapid increase in serum testosterone concentration occurred between 12 and 14 months of age, followed by rapid body and testicular growth. An elevation in testosterone levels is an indirect indicator that an acceleration inphysical and testicular growth is approaching. It is recommended to calculate both BMI and TV to follow cattle growth due to the high correlation between these variables.
publishDate 2017
dc.date.none.fl_str_mv 2017-08-25
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/27401
10.5433/1679-0359.2017v38n4Supl1p2561
url https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/27401
identifier_str_mv 10.5433/1679-0359.2017v38n4Supl1p2561
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/27401/21591
dc.rights.driver.fl_str_mv Copyright (c) 2017 Semina: Ciências Agrárias
http://creativecommons.org/licenses/by-nc/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2017 Semina: Ciências Agrárias
http://creativecommons.org/licenses/by-nc/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv UEL
publisher.none.fl_str_mv UEL
dc.source.none.fl_str_mv Semina: Ciências Agrárias; Vol. 38 No. 4Supl1 (2017); 2561-2580
Semina: Ciências Agrárias; v. 38 n. 4Supl1 (2017); 2561-2580
1679-0359
1676-546X
reponame:Semina. Ciências Agrárias (Online)
instname:Universidade Estadual de Londrina (UEL)
instacron:UEL
instname_str Universidade Estadual de Londrina (UEL)
instacron_str UEL
institution UEL
reponame_str Semina. Ciências Agrárias (Online)
collection Semina. Ciências Agrárias (Online)
repository.name.fl_str_mv Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)
repository.mail.fl_str_mv semina.agrarias@uel.br
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