Some factors affecting the number of days open in Argentinean dairy herds

Autores
Piccardi, Mónica Belén; Capitaine Funes, A.; Balzarini, Monica Graciela; Bo, Gabriel Amilcar
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The objective of this study was to estimate the relative contribution of factors affecting how quickly cattle become pregnant in Argentine dairy herds. Data from 76,401 cows from 249 dairy herds were analyzed. A hazard model was used to explore days open (DO). The factors considered were milk yield, lactation number, calving season, and breeding technique (i.e., type of service: artificial insemination [AI], or combined service). Cows with lower milk yield had 1.09 to 1.38 higher likelihood to become pregnant than those with higher milk yield (P < 0.0001). The number of DO increased linearly with an increasing number of lactations (P < 0.0001). Cows calving in fall-winter had a shorter interval to conception than those calving in summer. The hazard rate for combined service was 1.27; therefore, cows with combined service were more likely to become pregnant during the observation period than those bred by AI. The difference in DO between cows of high versus low milk yield was smaller when dairies used AI as the main breeding technique than when they used combined service. Furthermore, dairies using mainly combined service had lower milk yield (5693.7 L) than those using mainly AI (7684.4 L). Although lactation number and calving season contributed to explain the number of DO, the influence of production level, the type of service, and the interaction between them was also associated with reproductive efficiency in Argentine dairy herds.
Fil: Piccardi, Mónica Belén. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Departamento de Desarrollo Rural. Area de Estadística y Biometría; Argentina
Fil: Capitaine Funes, A.. DAIRYTECH S.R.L; Argentina
Fil: Balzarini, Monica Graciela. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Departamento de Desarrollo Rural. Area de Estadística y Biometría; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba; Argentina
Fil: Bo, Gabriel Amilcar. Instituto de Reproduccion Animal Córdoba; Argentina. Universidad Nacional de Villa María. Instituto Académico Pedagógico de Ciencias Básicas y Aplicadas; Argentina
Materia
ARTIFICIAL INSEMINATION
HAZARD MODEL
MILK YIELD
NONPREGNANT COWS
REPRODUCTIVE PERFORMANCE
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/2269
Acceder
id CONICETDig_7f0a75dfd05db9360f343badc0f544f0
oai_identifier_str oai:ri.conicet.gov.ar:11336/2269
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Some factors affecting the number of days open in Argentinean dairy herdsPiccardi, Mónica BelénCapitaine Funes, A.Balzarini, Monica GracielaBo, Gabriel AmilcarARTIFICIAL INSEMINATIONHAZARD MODELMILK YIELDNONPREGNANT COWSREPRODUCTIVE PERFORMANCEhttps://purl.org/becyt/ford/4.2https://purl.org/becyt/ford/4The objective of this study was to estimate the relative contribution of factors affecting how quickly cattle become pregnant in Argentine dairy herds. Data from 76,401 cows from 249 dairy herds were analyzed. A hazard model was used to explore days open (DO). The factors considered were milk yield, lactation number, calving season, and breeding technique (i.e., type of service: artificial insemination [AI], or combined service). Cows with lower milk yield had 1.09 to 1.38 higher likelihood to become pregnant than those with higher milk yield (P < 0.0001). The number of DO increased linearly with an increasing number of lactations (P < 0.0001). Cows calving in fall-winter had a shorter interval to conception than those calving in summer. The hazard rate for combined service was 1.27; therefore, cows with combined service were more likely to become pregnant during the observation period than those bred by AI. The difference in DO between cows of high versus low milk yield was smaller when dairies used AI as the main breeding technique than when they used combined service. Furthermore, dairies using mainly combined service had lower milk yield (5693.7 L) than those using mainly AI (7684.4 L). Although lactation number and calving season contributed to explain the number of DO, the influence of production level, the type of service, and the interaction between them was also associated with reproductive efficiency in Argentine dairy herds.Fil: Piccardi, Mónica Belén. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Departamento de Desarrollo Rural. Area de Estadística y Biometría; ArgentinaFil: Capitaine Funes, A.. DAIRYTECH S.R.L; ArgentinaFil: Balzarini, Monica Graciela. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Departamento de Desarrollo Rural. Area de Estadística y Biometría; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba; ArgentinaFil: Bo, Gabriel Amilcar. Instituto de Reproduccion Animal Córdoba; Argentina. Universidad Nacional de Villa María. Instituto Académico Pedagógico de Ciencias Básicas y Aplicadas; ArgentinaElsevier Science Inc.2013-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/2269Piccardi, Mónica Belén; Capitaine Funes, A.; Balzarini, Monica Graciela; Bo, Gabriel Amilcar; Some factors affecting the number of days open in Argentinean dairy herds; Elsevier Science Inc.; Theriogenology; 79; 5; 3-2013; 760-7650093-691Xenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0093691X12006401info:eu-repo/semantics/altIdentifier/doi/10.1016/j.theriogenology.2012.11.032info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T12:09:58Zoai:ri.conicet.gov.ar:11336/2269instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 12:09:59.241CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Some factors affecting the number of days open in Argentinean dairy herds
title Some factors affecting the number of days open in Argentinean dairy herds
spellingShingle Some factors affecting the number of days open in Argentinean dairy herds
Piccardi, Mónica Belén
ARTIFICIAL INSEMINATION
HAZARD MODEL
MILK YIELD
NONPREGNANT COWS
REPRODUCTIVE PERFORMANCE
title_short Some factors affecting the number of days open in Argentinean dairy herds
title_full Some factors affecting the number of days open in Argentinean dairy herds
title_fullStr Some factors affecting the number of days open in Argentinean dairy herds
title_full_unstemmed Some factors affecting the number of days open in Argentinean dairy herds
title_sort Some factors affecting the number of days open in Argentinean dairy herds
dc.creator.none.fl_str_mv Piccardi, Mónica Belén
Capitaine Funes, A.
Balzarini, Monica Graciela
Bo, Gabriel Amilcar
author Piccardi, Mónica Belén
author_facet Piccardi, Mónica Belén
Capitaine Funes, A.
Balzarini, Monica Graciela
Bo, Gabriel Amilcar
author_role author
author2 Capitaine Funes, A.
Balzarini, Monica Graciela
Bo, Gabriel Amilcar
author2_role author
author
author
dc.subject.none.fl_str_mv ARTIFICIAL INSEMINATION
HAZARD MODEL
MILK YIELD
NONPREGNANT COWS
REPRODUCTIVE PERFORMANCE
topic ARTIFICIAL INSEMINATION
HAZARD MODEL
MILK YIELD
NONPREGNANT COWS
REPRODUCTIVE PERFORMANCE
purl_subject.fl_str_mv https://purl.org/becyt/ford/4.2
https://purl.org/becyt/ford/4
dc.description.none.fl_txt_mv The objective of this study was to estimate the relative contribution of factors affecting how quickly cattle become pregnant in Argentine dairy herds. Data from 76,401 cows from 249 dairy herds were analyzed. A hazard model was used to explore days open (DO). The factors considered were milk yield, lactation number, calving season, and breeding technique (i.e., type of service: artificial insemination [AI], or combined service). Cows with lower milk yield had 1.09 to 1.38 higher likelihood to become pregnant than those with higher milk yield (P < 0.0001). The number of DO increased linearly with an increasing number of lactations (P < 0.0001). Cows calving in fall-winter had a shorter interval to conception than those calving in summer. The hazard rate for combined service was 1.27; therefore, cows with combined service were more likely to become pregnant during the observation period than those bred by AI. The difference in DO between cows of high versus low milk yield was smaller when dairies used AI as the main breeding technique than when they used combined service. Furthermore, dairies using mainly combined service had lower milk yield (5693.7 L) than those using mainly AI (7684.4 L). Although lactation number and calving season contributed to explain the number of DO, the influence of production level, the type of service, and the interaction between them was also associated with reproductive efficiency in Argentine dairy herds.
Fil: Piccardi, Mónica Belén. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Departamento de Desarrollo Rural. Area de Estadística y Biometría; Argentina
Fil: Capitaine Funes, A.. DAIRYTECH S.R.L; Argentina
Fil: Balzarini, Monica Graciela. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Departamento de Desarrollo Rural. Area de Estadística y Biometría; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba; Argentina
Fil: Bo, Gabriel Amilcar. Instituto de Reproduccion Animal Córdoba; Argentina. Universidad Nacional de Villa María. Instituto Académico Pedagógico de Ciencias Básicas y Aplicadas; Argentina
description The objective of this study was to estimate the relative contribution of factors affecting how quickly cattle become pregnant in Argentine dairy herds. Data from 76,401 cows from 249 dairy herds were analyzed. A hazard model was used to explore days open (DO). The factors considered were milk yield, lactation number, calving season, and breeding technique (i.e., type of service: artificial insemination [AI], or combined service). Cows with lower milk yield had 1.09 to 1.38 higher likelihood to become pregnant than those with higher milk yield (P < 0.0001). The number of DO increased linearly with an increasing number of lactations (P < 0.0001). Cows calving in fall-winter had a shorter interval to conception than those calving in summer. The hazard rate for combined service was 1.27; therefore, cows with combined service were more likely to become pregnant during the observation period than those bred by AI. The difference in DO between cows of high versus low milk yield was smaller when dairies used AI as the main breeding technique than when they used combined service. Furthermore, dairies using mainly combined service had lower milk yield (5693.7 L) than those using mainly AI (7684.4 L). Although lactation number and calving season contributed to explain the number of DO, the influence of production level, the type of service, and the interaction between them was also associated with reproductive efficiency in Argentine dairy herds.
publishDate 2013
dc.date.none.fl_str_mv 2013-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/2269
Piccardi, Mónica Belén; Capitaine Funes, A.; Balzarini, Monica Graciela; Bo, Gabriel Amilcar; Some factors affecting the number of days open in Argentinean dairy herds; Elsevier Science Inc.; Theriogenology; 79; 5; 3-2013; 760-765
0093-691X
url http://hdl.handle.net/11336/2269
identifier_str_mv Piccardi, Mónica Belén; Capitaine Funes, A.; Balzarini, Monica Graciela; Bo, Gabriel Amilcar; Some factors affecting the number of days open in Argentinean dairy herds; Elsevier Science Inc.; Theriogenology; 79; 5; 3-2013; 760-765
0093-691X
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0093691X12006401
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.theriogenology.2012.11.032
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science Inc.
publisher.none.fl_str_mv Elsevier Science Inc.
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1846782481457479680
score 12.982451

Publicaciones similares