CALVING INTERVAL OF A BRANGUS HERD IN THE MEXICAN HUMID TROPIC

CALVING INTERVAL OF A BRANGUS HERD IN THE MEXICAN HUMID TROPIC

Data from 2,593 observations recorded between 1971 and 1984 in a herd of 652 commercial Brangus cows located in the humid tropic of México were analyzed to estimate the calving interval (CI) as well as the effect of year of calving (YC), season of calving (SC), age of cow and sex of calf on the CI. The repeatability for CI was also estimated by the intraclass correlation method, including the cow effect in a mixed model as a random effect. The overall mean for CI was 413.1 ± 67.3 days, with YC, SC, and the interaction YC x SC significantly influencing its variation. The effect of YC did not show a consistent pattern, with means ranging from 404 (1974) to 423 (1982 and 1983) days. Concerning SC, the means were 409 days for the dry season (mar-jun), 416 days for the rainy season (jul-oct), whereas the highest mean (437 days) was found in the windy season (nov-feb). When the interaction YC x SC effect was examined, it showed in general, that the lowest means during the years of study were found in the dry season and the highest means of CI in the windy season. The repeatability estimate for CI in this population was 0.11 ± 0.02.

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Main Authors: Rubio-Rubio, Moisés, Torres-Hernández, Glafiro, Hinojosa-Cuéllar, Alfonso, García-Bojalil, Carlos, González-Cossío, Félix
Format: Digital revista
Language:spa
Published: Colegio de Postgraduados 1996
Online Access:https://www.agrociencia-colpos.org/index.php/agrociencia/article/view/1340
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spelling oai:ojs.pkp.sfu.ca:article13402020-05-14T05:37:00Z CALVING INTERVAL OF A BRANGUS HERD IN THE MEXICAN HUMID TROPIC INTERVALO ENTRE PARTOS DE UN HATO BRANGUS EN EL TROPICO HUMEDO DE MEXICO Rubio-Rubio, Moisés Torres-Hernández, Glafiro Hinojosa-Cuéllar, Alfonso García-Bojalil, Carlos González-Cossío, Félix Calving interval tropic repeatability Intervalo entre partos trópico índice de repetición Data from 2,593 observations recorded between 1971 and 1984 in a herd of 652 commercial Brangus cows located in the humid tropic of México were analyzed to estimate the calving interval (CI) as well as the effect of year of calving (YC), season of calving (SC), age of cow and sex of calf on the CI. The repeatability for CI was also estimated by the intraclass correlation method, including the cow effect in a mixed model as a random effect. The overall mean for CI was 413.1 ± 67.3 days, with YC, SC, and the interaction YC x SC significantly influencing its variation. The effect of YC did not show a consistent pattern, with means ranging from 404 (1974) to 423 (1982 and 1983) days. Concerning SC, the means were 409 days for the dry season (mar-jun), 416 days for the rainy season (jul-oct), whereas the highest mean (437 days) was found in the windy season (nov-feb). When the interaction YC x SC effect was examined, it showed in general, that the lowest means during the years of study were found in the dry season and the highest means of CI in the windy season. The repeatability estimate for CI in this population was 0.11 ± 0.02. La información del presente estudio proviene de 2,593 observaciones recopiladas entre los años 1971 y 1984 en un hato comercial de 652 vacas Brangus ubicado en el trópico húmedo, con el propósito de estimar el intervalo entre partos (IP) y el efecto que tienen sobre éste el año de parto, la época de parto, la edad de la vaca al parto y el sexo de la cría. Por otra parte, estimar también el índice de repetición para el IP por el método de la correlación intraclase, empleando para ello un modelo mixto que incluyó las variables anteriores, más la variable vaca, como efecto aleatorio. La media general del IP fue 413.1 ± 67.3 días, influyendo significativamente en su variación el año de parto (p Colegio de Postgraduados 1996-03-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://www.agrociencia-colpos.org/index.php/agrociencia/article/view/1340 Agrociencia; Vol. 30 No. 1 (1996): 1996-ene-mar; 31-36 Agrociencia; Vol. 30 Núm. 1 (1996): 1996-ene-mar; 31-36 2521-9766 1405-3195 spa https://www.agrociencia-colpos.org/index.php/agrociencia/article/view/1340/1340
institution COLPOS
collection OJS
country México
countrycode MX
component Revista
access En linea
databasecode rev-agrociencia-mx
tag revista
region America del Norte
libraryname Departamento de documentación y biblioteca de COLPOS
language spa
format Digital
author Rubio-Rubio, Moisés
Torres-Hernández, Glafiro
Hinojosa-Cuéllar, Alfonso
García-Bojalil, Carlos
González-Cossío, Félix
spellingShingle Rubio-Rubio, Moisés
Torres-Hernández, Glafiro
Hinojosa-Cuéllar, Alfonso
García-Bojalil, Carlos
González-Cossío, Félix
CALVING INTERVAL OF A BRANGUS HERD IN THE MEXICAN HUMID TROPIC
author_facet Rubio-Rubio, Moisés
Torres-Hernández, Glafiro
Hinojosa-Cuéllar, Alfonso
García-Bojalil, Carlos
González-Cossío, Félix
author_sort Rubio-Rubio, Moisés
title CALVING INTERVAL OF A BRANGUS HERD IN THE MEXICAN HUMID TROPIC
title_short CALVING INTERVAL OF A BRANGUS HERD IN THE MEXICAN HUMID TROPIC
title_full CALVING INTERVAL OF A BRANGUS HERD IN THE MEXICAN HUMID TROPIC
title_fullStr CALVING INTERVAL OF A BRANGUS HERD IN THE MEXICAN HUMID TROPIC
title_full_unstemmed CALVING INTERVAL OF A BRANGUS HERD IN THE MEXICAN HUMID TROPIC
title_sort calving interval of a brangus herd in the mexican humid tropic
description Data from 2,593 observations recorded between 1971 and 1984 in a herd of 652 commercial Brangus cows located in the humid tropic of México were analyzed to estimate the calving interval (CI) as well as the effect of year of calving (YC), season of calving (SC), age of cow and sex of calf on the CI. The repeatability for CI was also estimated by the intraclass correlation method, including the cow effect in a mixed model as a random effect. The overall mean for CI was 413.1 ± 67.3 days, with YC, SC, and the interaction YC x SC significantly influencing its variation. The effect of YC did not show a consistent pattern, with means ranging from 404 (1974) to 423 (1982 and 1983) days. Concerning SC, the means were 409 days for the dry season (mar-jun), 416 days for the rainy season (jul-oct), whereas the highest mean (437 days) was found in the windy season (nov-feb). When the interaction YC x SC effect was examined, it showed in general, that the lowest means during the years of study were found in the dry season and the highest means of CI in the windy season. The repeatability estimate for CI in this population was 0.11 ± 0.02.
publisher Colegio de Postgraduados
publishDate 1996
url https://www.agrociencia-colpos.org/index.php/agrociencia/article/view/1340
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