Establishment and endogeny of haematologic rhythms in calves

The aims of the present work were to analyse the variations of haematological variables in neonatal bovine submitted to different photoperiods and to establish the origin and the ontogeny of the rhythms. This work was carried out during the months of June and July of 2004. Twelve Holstein bovine wer...

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Autores principales: Cerutti, Raúl Delmar, Scaglione, María Cristina, Baggio, Juan Carlos
Formato: Artículo PeerReviewed
Lenguaje:Español
Publicado: 2009
Materias:
R Medicina (General)
Acceso en línea:http://pa.bibdigital.ucc.edu.ar/4953/1/A_Cerutti.pdf
Aporte de:
Producción Académica Universidad Católica de Córdoba (UCCor) de Universidad Católica de Córdoba
id I38-R144-4953
record_format dspace
spelling I38-R144-49532025-10-28T13:36:35Z http://pa.bibdigital.ucc.edu.ar/4953/ Establishment and endogeny of haematologic rhythms in calves Cerutti, Raúl Delmar Scaglione, María Cristina Baggio, Juan Carlos R Medicina (General) The aims of the present work were to analyse the variations of haematological variables in neonatal bovine submitted to different photoperiods and to establish the origin and the ontogeny of the rhythms. This work was carried out during the months of June and July of 2004. Twelve Holstein bovine were used, and they were divided into two groups and submitted to different photoperiods. One group received LD 10:14 and the other one LD 24:00. Blood samples by jugular punction were obtained from animals of 3, 7, 14, 20 and 30 days of life (LD 10:14) and the ones with 30 days of life (LD 24:00), during a period of 24 h at intervals of 20 h. The following tests of erythrocytes, haemoglobin concentration, lymphocytes, monocytes, granulocytes and platelets were done in all samples. Haematological variables were measured by means of a haematological counter and analysed by repeated measures through analysis of variance and cosinor analysis. There were chronobiological variations adjusted to daily rhythms in the erythrocytes, haemoglobin, lymphocytes, monocytes and granulocytes. The platelets variable presented ultradian variations. The biological rhythms of free running in calves under constant light conditions go on being expressed, showing the existence of an endogenous biological clock. With respect to the establishment of the biological rhythms in neonatal bovines, it is observed that the circadian system is not totally present at the moment of birth but is developed during the postnatal period. At birth, calves present ultradian rhythms in most of their variables but, progressively, they shorten their frequencies until settling down daily; this transition corresponds to the period of morphophysiological changes of the digestive system. The results shown in this study evidence that most of haematological variables represent circadian rhythms synchronised mainly by the photoperiod. 2009-12-31 Artículo PeerReviewed application/pdf spa http://pa.bibdigital.ucc.edu.ar/4953/1/A_Cerutti.pdf Cerutti, Raúl Delmar, Scaglione, María Cristina ORCID: https://orcid.org/0000-0001-6381-4165 <https://orcid.org/0000-0001-6381-4165> and Baggio, Juan Carlos (2009) Establishment and endogeny of haematologic rhythms in calves. Comparative Clinical Pathology, 18 (3). pp. 301-311. ISSN 1618565X info:eu-repo/semantics/altIdentifier/doi/10.1007/s00580-008-0804-5
institution Universidad Católica de Córdoba
institution_str I-38
repository_str R-144
collection Producción Académica Universidad Católica de Córdoba (UCCor)
language Español
orig_language_str_mv spa
topic R Medicina (General)
spellingShingle R Medicina (General)
Cerutti, Raúl Delmar
Scaglione, María Cristina
Baggio, Juan Carlos
Establishment and endogeny of haematologic rhythms in calves
topic_facet R Medicina (General)
description The aims of the present work were to analyse the variations of haematological variables in neonatal bovine submitted to different photoperiods and to establish the origin and the ontogeny of the rhythms. This work was carried out during the months of June and July of 2004. Twelve Holstein bovine were used, and they were divided into two groups and submitted to different photoperiods. One group received LD 10:14 and the other one LD 24:00. Blood samples by jugular punction were obtained from animals of 3, 7, 14, 20 and 30 days of life (LD 10:14) and the ones with 30 days of life (LD 24:00), during a period of 24 h at intervals of 20 h. The following tests of erythrocytes, haemoglobin concentration, lymphocytes, monocytes, granulocytes and platelets were done in all samples. Haematological variables were measured by means of a haematological counter and analysed by repeated measures through analysis of variance and cosinor analysis. There were chronobiological variations adjusted to daily rhythms in the erythrocytes, haemoglobin, lymphocytes, monocytes and granulocytes. The platelets variable presented ultradian variations. The biological rhythms of free running in calves under constant light conditions go on being expressed, showing the existence of an endogenous biological clock. With respect to the establishment of the biological rhythms in neonatal bovines, it is observed that the circadian system is not totally present at the moment of birth but is developed during the postnatal period. At birth, calves present ultradian rhythms in most of their variables but, progressively, they shorten their frequencies until settling down daily; this transition corresponds to the period of morphophysiological changes of the digestive system. The results shown in this study evidence that most of haematological variables represent circadian rhythms synchronised mainly by the photoperiod.
format Artículo
PeerReviewed
author Cerutti, Raúl Delmar
Scaglione, María Cristina
Baggio, Juan Carlos
author_facet Cerutti, Raúl Delmar
Scaglione, María Cristina
Baggio, Juan Carlos
author_sort Cerutti, Raúl Delmar
title Establishment and endogeny of haematologic rhythms in calves
title_short Establishment and endogeny of haematologic rhythms in calves
title_full Establishment and endogeny of haematologic rhythms in calves
title_fullStr Establishment and endogeny of haematologic rhythms in calves
title_full_unstemmed Establishment and endogeny of haematologic rhythms in calves
title_sort establishment and endogeny of haematologic rhythms in calves
publishDate 2009
url http://pa.bibdigital.ucc.edu.ar/4953/1/A_Cerutti.pdf
work_keys_str_mv AT ceruttirauldelmar establishmentandendogenyofhaematologicrhythmsincalves
AT scaglionemariacristina establishmentandendogenyofhaematologicrhythmsincalves
AT baggiojuancarlos establishmentandendogenyofhaematologicrhythmsincalves
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