Effect of the breed and age on the thyroid hormones T3 and T4 concentrations in bovines under tropical conditions

Effect of the breed and age on the thyroid hormones T3 and T4 concentrations in bovines under tropical conditions

To study the effect of age and breed on blood concentration of thyroid hormones T3 and T4 under the dry tropic conditions, 158 animals from the groups Holstein, Lucerna, Hartón del Valle, Brahman and crossbred F1 Brahman x Brown Swiss were sampled. The animals were allocated in four age groups from newborns calves until eight month old. The average T3 concentration was of 2.25 mmolL-¹ and the T4 was of 57.37 mmolL-¹. The correlation between T3 and T4 was of 0.53. A statistical significant difference (p<0.001) was found for the effects of age breed and group, but not difference was found for the interaction between breed and age (p=0.286). The breeds with higher blood concentrations of T3 and T4 were Holstein and Lucerna. The lowest concentration was found among the crossbred group. The higher concentration of T3 and T4 of thyroid hormones was found in the newborn group. As the calves grow, the concentrations of T3 and T4 decrease progressively. This study found that under dry tropic conditions, in a thermo-neutral borderline zone (according to the THI index) the young bovines show clear differences in the concentration of the thyroid hormones.Key words: Adaptation; Bovine; Growth; Thyroids.

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Main Authors: Campos Gaona, Rómulo, Giraldo P, Leonidas
Format: Digital revista
Language:spa
Published: Universidad Nacional de Colombia - Sede Palmira 2008
Online Access:https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/1354
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spelling oai:www.revistas.unal.edu.co:article-13542014-05-14T14:05:55Z Effect of the breed and age on the thyroid hormones T3 and T4 concentrations in bovines under tropical conditions Efecto de la raza y la edad sobre las concentraciones de hormonas tiroideas T3 y T4 de bovinos en condiciones tropicales Campos Gaona, Rómulo Giraldo P, Leonidas Adaptación Bovinos Crecimiento Tiroides Adaptation Bovine Growth Thyroids To study the effect of age and breed on blood concentration of thyroid hormones T3 and T4 under the dry tropic conditions, 158 animals from the groups Holstein, Lucerna, Hartón del Valle, Brahman and crossbred F1 Brahman x Brown Swiss were sampled. The animals were allocated in four age groups from newborns calves until eight month old. The average T3 concentration was of 2.25 mmolL-¹ and the T4 was of 57.37 mmolL-¹. The correlation between T3 and T4 was of 0.53. A statistical significant difference (p<0.001) was found for the effects of age breed and group, but not difference was found for the interaction between breed and age (p=0.286). The breeds with higher blood concentrations of T3 and T4 were Holstein and Lucerna. The lowest concentration was found among the crossbred group. The higher concentration of T3 and T4 of thyroid hormones was found in the newborn group. As the calves grow, the concentrations of T3 and T4 decrease progressively. This study found that under dry tropic conditions, in a thermo-neutral borderline zone (according to the THI index) the young bovines show clear differences in the concentration of the thyroid hormones.Key words: Adaptation; Bovine; Growth; Thyroids. Para estudiar el efecto en condiciones de trópico seco de la edad y del grupo racial sobre las concentraciones séricas de las hormonas tiroideas T3 y T4, se muestrearon 158 animales de los grupos raciales Holstein, Lucerna, Hartón del Valle, Cebú Brahman y mestizo F1 (Cebú Brahman x Pardo Suizo), distribuidos en cuatro grupos de edad desde el nacimiento hasta el destete (8 meses). La concentración media de T3 fue 2.25 mmol/L y la de T4, 57.37 mmol/L. La correlación entre T3 y T4 fue de 0.53. Se encontró diferencia estadísticamente significativa para el efecto grupo racial, grupo de edad (P<0.001) pero no para la interacción grupo racial x edad (p=0.286). Los grupos raciales con concentraciones más elevadas fueron Holstein y Lucerna; la concentración más baja se presentó en los bovinos mestizos. La mayor concentración de hormonas tiroideas según la edad ocurrió en recién nacidos, luego descendió progresiva y linealmente. El trabajo encontró que en condiciones de trópico seco, en zona límite de termoneutralidad según el índice ITH, los bovinos jóvenes presentanron diferencias marcadas en las concentraciones de hormonas tiroideas.Palabras claves: Adaptación; Bovinos; Crecimiento; Tiroides. Universidad Nacional de Colombia - Sede Palmira 2008-04-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/msword application/pdf text/html https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/1354 Acta Agronómica; Vol. 57 No. 2 (2008); 137-142 Acta Agronómica; Vol. 57 Núm. 2 (2008); 137-142 Acta Agronómica; v. 57 n. 2 (2008); 137-142 2323-0118 0120-2812 spa https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/1354/1947 https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/1354/1948 https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/1354/1949 Derechos de autor 2008 Acta Agronómica https://creativecommons.org/licenses/by-nc-nd/4.0
institution UNAL
collection OJS
country Colombia
countrycode CO
component Revista
access En linea
databasecode rev-actaagronomica
tag revista
region America del Sur
libraryname Sistema Nacional de Bibliotecas de la UNAL
language spa
format Digital
author Campos Gaona, Rómulo
Giraldo P, Leonidas
spellingShingle Campos Gaona, Rómulo
Giraldo P, Leonidas
Effect of the breed and age on the thyroid hormones T3 and T4 concentrations in bovines under tropical conditions
author_facet Campos Gaona, Rómulo
Giraldo P, Leonidas
author_sort Campos Gaona, Rómulo
title Effect of the breed and age on the thyroid hormones T3 and T4 concentrations in bovines under tropical conditions
title_short Effect of the breed and age on the thyroid hormones T3 and T4 concentrations in bovines under tropical conditions
title_full Effect of the breed and age on the thyroid hormones T3 and T4 concentrations in bovines under tropical conditions
title_fullStr Effect of the breed and age on the thyroid hormones T3 and T4 concentrations in bovines under tropical conditions
title_full_unstemmed Effect of the breed and age on the thyroid hormones T3 and T4 concentrations in bovines under tropical conditions
title_sort effect of the breed and age on the thyroid hormones t3 and t4 concentrations in bovines under tropical conditions
description To study the effect of age and breed on blood concentration of thyroid hormones T3 and T4 under the dry tropic conditions, 158 animals from the groups Holstein, Lucerna, Hartón del Valle, Brahman and crossbred F1 Brahman x Brown Swiss were sampled. The animals were allocated in four age groups from newborns calves until eight month old. The average T3 concentration was of 2.25 mmolL-¹ and the T4 was of 57.37 mmolL-¹. The correlation between T3 and T4 was of 0.53. A statistical significant difference (p<0.001) was found for the effects of age breed and group, but not difference was found for the interaction between breed and age (p=0.286). The breeds with higher blood concentrations of T3 and T4 were Holstein and Lucerna. The lowest concentration was found among the crossbred group. The higher concentration of T3 and T4 of thyroid hormones was found in the newborn group. As the calves grow, the concentrations of T3 and T4 decrease progressively. This study found that under dry tropic conditions, in a thermo-neutral borderline zone (according to the THI index) the young bovines show clear differences in the concentration of the thyroid hormones.Key words: Adaptation; Bovine; Growth; Thyroids.
publisher Universidad Nacional de Colombia - Sede Palmira
publishDate 2008
url https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/1354
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AT giraldopleonidas effectofthebreedandageonthethyroidhormonest3andt4concentrationsinbovinesundertropicalconditions
AT camposgaonaromulo efectodelarazaylaedadsobrelasconcentracionesdehormonastiroideast3yt4debovinosencondicionestropicales
AT giraldopleonidas efectodelarazaylaedadsobrelasconcentracionesdehormonastiroideast3yt4debovinosencondicionestropicales
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