Multivariate analysis about causes of growth delay in early weaned calves

The purpose of this trial was to check if early weaned calf growth delay is due to stress or inadequate feeding. In 4 successive years, assays of 120 days each were carried out, using in total 120 half-bred Zebu calves (2 months old) grazed on natural pasture. Sixty animals were controls fed on mate...

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Autor principal: Coppo, J. A.
Formato: Artículo revista
Lenguaje:Español
Publicado: Universidad Nacional del Nordeste 2007
Materias:
Half-bred Zebu calf
liveweight gain
biochemical alterations
stress
malnutrition.
Acceso en línea:https://revistas.unne.edu.ar/index.php/vet/article/view/1922
Aporte de:
Revistas UNNE - Universidad Nacional del Noroeste (UNNE) de Universidad Nacional del Nordeste
id I48-R154-article-1922
record_format ojs
spelling I48-R154-article-19222025-02-12T21:58:16Z Multivariate analysis about causes of growth delay in early weaned calves Coppo, J. A. Half-bred Zebu calf liveweight gain biochemical alterations stress malnutrition. The purpose of this trial was to check if early weaned calf growth delay is due to stress or inadequate feeding. In 4 successive years, assays of 120 days each were carried out, using in total 120 half-bred Zebu calves (2 months old) grazed on natural pasture. Sixty animals were controls fed on maternal milk (C), and other 60 made up the experimental group (E), which was submitted to early weaning and supplemented with balanced food. Weightings and blood extractions were made in days 0, 7, 14, 21, 28, 60, 90 and 120. Hematological and biochemical determinations (42 parameters) included stress and malnutrition indicators, which were evaluated by radio-immune-assay, chemoluminiscency, spectrophotometry, electrophoresis, and electronic particle recount. Such procedures generated more than 40,000 data, which were statistically processed by multivariate techniques, to eliminate the additive effect of random intervention probability (alpha error), characteristic from univariate methods that comprise numerous dependent variables. Variables that obtained significant differences for treatment and/or time effects in repeated measures univariate techniques, were selected for analysis of principal components. Four orthogonal supervariables, susceptible to stress, malnutrition and ontogeny, were created. Weight gains were 79.9 kg (666 g/animal/day) in C, and 61.6 kg (513 g/animal/day) in E. Variations of cortisol, aldosterone, fructosamine, glucose, sodium, potassium, leukocytes, gamma globulins and enzymes suggested absence of stress, examined under an ontogenic frame. On the other hand, decrease of protein, carbohydrate, lipid, and mineral nutritional indicators, revealed malnutrition in E. Selected principal components indicated that most of total variance was due to malnutrition and ontogeny, but not to stress. It is important to develop more appropriate balanced supplements for early weaned calves. Universidad Nacional del Nordeste 2007-01-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.unne.edu.ar/index.php/vet/article/view/1922 10.30972/vet.1811922 Revista Veterinaria; Vol. 18 Núm. 1 (2007); 37-45 1669-6840 1668-4834 spa https://revistas.unne.edu.ar/index.php/vet/article/view/1922/1673 Derechos de autor 2007 J. A. Coppo https://creativecommons.org/licenses/by-nc/4.0
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-154
container_title_str Revistas UNNE - Universidad Nacional del Noroeste (UNNE)
language Español
format Artículo revista
topic Half-bred Zebu calf
liveweight gain
biochemical alterations
stress
malnutrition.
spellingShingle Half-bred Zebu calf
liveweight gain
biochemical alterations
stress
malnutrition.
Coppo, J. A.
Multivariate analysis about causes of growth delay in early weaned calves
topic_facet Half-bred Zebu calf
liveweight gain
biochemical alterations
stress
malnutrition.
author Coppo, J. A.
author_facet Coppo, J. A.
author_sort Coppo, J. A.
title Multivariate analysis about causes of growth delay in early weaned calves
title_short Multivariate analysis about causes of growth delay in early weaned calves
title_full Multivariate analysis about causes of growth delay in early weaned calves
title_fullStr Multivariate analysis about causes of growth delay in early weaned calves
title_full_unstemmed Multivariate analysis about causes of growth delay in early weaned calves
title_sort multivariate analysis about causes of growth delay in early weaned calves
description The purpose of this trial was to check if early weaned calf growth delay is due to stress or inadequate feeding. In 4 successive years, assays of 120 days each were carried out, using in total 120 half-bred Zebu calves (2 months old) grazed on natural pasture. Sixty animals were controls fed on maternal milk (C), and other 60 made up the experimental group (E), which was submitted to early weaning and supplemented with balanced food. Weightings and blood extractions were made in days 0, 7, 14, 21, 28, 60, 90 and 120. Hematological and biochemical determinations (42 parameters) included stress and malnutrition indicators, which were evaluated by radio-immune-assay, chemoluminiscency, spectrophotometry, electrophoresis, and electronic particle recount. Such procedures generated more than 40,000 data, which were statistically processed by multivariate techniques, to eliminate the additive effect of random intervention probability (alpha error), characteristic from univariate methods that comprise numerous dependent variables. Variables that obtained significant differences for treatment and/or time effects in repeated measures univariate techniques, were selected for analysis of principal components. Four orthogonal supervariables, susceptible to stress, malnutrition and ontogeny, were created. Weight gains were 79.9 kg (666 g/animal/day) in C, and 61.6 kg (513 g/animal/day) in E. Variations of cortisol, aldosterone, fructosamine, glucose, sodium, potassium, leukocytes, gamma globulins and enzymes suggested absence of stress, examined under an ontogenic frame. On the other hand, decrease of protein, carbohydrate, lipid, and mineral nutritional indicators, revealed malnutrition in E. Selected principal components indicated that most of total variance was due to malnutrition and ontogeny, but not to stress. It is important to develop more appropriate balanced supplements for early weaned calves.
publisher Universidad Nacional del Nordeste
publishDate 2007
url https://revistas.unne.edu.ar/index.php/vet/article/view/1922
work_keys_str_mv AT coppoja multivariateanalysisaboutcausesofgrowthdelayinearlyweanedcalves
first_indexed 2025-05-17T05:08:54Z
last_indexed 2025-05-17T05:08:54Z
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