Sperm head ellipticity as a heat stress indicator in Australian Merino rams (Ovis aries) in Northern Patagonia, Argentina

Autores
Lopez Armengol, Maria Fernanda; Sabino, G. A.; Forquera, J. C.; de la Casa, Antonio Carlos; Aisen, Eduardo Gabriel
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In Northern Patagonia, Argentina, the ovine mating season starts on March 15, which is the time when rams are submitted to summer temperatures. This study assessed the adaptability of 12 Australian Merino rams, six unshorn and six shorn, half of which were treated in a heat chamber for fivedays (09.00hours to 17.00hours) that gradually reached 40°C. In an attempt to quantify the effects of heat stress on sperm head morphology, ellipticity was analyzed to establish the relationship between the distributions of subpopulations, light hours, temperature and humidity. Ellipticity was measured on 9224 sperm heads that were obtained over 12 weeks starting in the summer time. Four sperm head subpopulations (S) were identified by comparison with a sperm head population of ejaculates obtained in the late breeding season without the effect of heat stress (S1=heads with ellipticity≥2.00; S2=sperm head with range of ellipticity between 1.80 and 1.99; S3=sperm head with range of ellipticity from 1.60 to 1.79; and S4=sperm head with range of ellipticity from 1.30 to 1.59). The variable sperm head ellipticity for each ejaculate was expressed as the means and frequencies of subpopulation. The results demonstrate changes in ram sperm head ellipticity in different conditions (control/treated, unshorn/shorn) throughout the experiment (P<0.05). Treated shorn rams had a higher mean ellipticity and frequency of elliptical heads (mean ellipticity value=2.06 and S1 frequency=76.35%), peaking in the seventh week posttreatment (on the basis of the action of heat stress on seminiferous tubules). According to this study, unshorn rams were better adapted to heat stress than the shorn ones.
Fil: Lopez Armengol, Maria Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigaciones En Toxicología Ambiental y Agrobiotecnología del Comahue. Instituto de Biotecnología Agropecuaria del Comahue | Universidad Nacional del Comahue. Facultad de Cs.agrarias. Centro de Investigaciones En Toxicología Ambiental y Agrobiotecnología del Comahue. Instituto de Biotecnología Agropecuaria del Comahue; Argentina
Fil: Sabino, G. A.. Universidad Nacional del Comahue. Facultad de Economía y Administración; Argentina
Fil: Forquera, J. C.. Universidad Nacional del Comahue. Facultad de Ciencias Agrarias; Argentina
Fil: de la Casa, Antonio Carlos. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Aisen, Eduardo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigaciones En Toxicología Ambiental y Agrobiotecnología del Comahue. Instituto de Biotecnología Agropecuaria del Comahue | Universidad Nacional del Comahue. Facultad de Cs.agrarias. Centro de Investigaciones En Toxicología Ambiental y Agrobiotecnología del Comahue. Instituto de Biotecnología Agropecuaria del Comahue; Argentina
Materia
Heat Stress
Merino Ram
Sperm Head Ellipticity
Unshorn/Shorn
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:11336/37736
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/37736
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Sperm head ellipticity as a heat stress indicator in Australian Merino rams (Ovis aries) in Northern Patagonia, ArgentinaLopez Armengol, Maria FernandaSabino, G. A.Forquera, J. C.de la Casa, Antonio CarlosAisen, Eduardo GabrielHeat StressMerino RamSperm Head EllipticityUnshorn/Shornhttps://purl.org/becyt/ford/4.2https://purl.org/becyt/ford/4In Northern Patagonia, Argentina, the ovine mating season starts on March 15, which is the time when rams are submitted to summer temperatures. This study assessed the adaptability of 12 Australian Merino rams, six unshorn and six shorn, half of which were treated in a heat chamber for fivedays (09.00hours to 17.00hours) that gradually reached 40°C. In an attempt to quantify the effects of heat stress on sperm head morphology, ellipticity was analyzed to establish the relationship between the distributions of subpopulations, light hours, temperature and humidity. Ellipticity was measured on 9224 sperm heads that were obtained over 12 weeks starting in the summer time. Four sperm head subpopulations (S) were identified by comparison with a sperm head population of ejaculates obtained in the late breeding season without the effect of heat stress (S1=heads with ellipticity≥2.00; S2=sperm head with range of ellipticity between 1.80 and 1.99; S3=sperm head with range of ellipticity from 1.60 to 1.79; and S4=sperm head with range of ellipticity from 1.30 to 1.59). The variable sperm head ellipticity for each ejaculate was expressed as the means and frequencies of subpopulation. The results demonstrate changes in ram sperm head ellipticity in different conditions (control/treated, unshorn/shorn) throughout the experiment (P<0.05). Treated shorn rams had a higher mean ellipticity and frequency of elliptical heads (mean ellipticity value=2.06 and S1 frequency=76.35%), peaking in the seventh week posttreatment (on the basis of the action of heat stress on seminiferous tubules). According to this study, unshorn rams were better adapted to heat stress than the shorn ones.Fil: Lopez Armengol, Maria Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigaciones En Toxicología Ambiental y Agrobiotecnología del Comahue. Instituto de Biotecnología Agropecuaria del Comahue | Universidad Nacional del Comahue. Facultad de Cs.agrarias. Centro de Investigaciones En Toxicología Ambiental y Agrobiotecnología del Comahue. Instituto de Biotecnología Agropecuaria del Comahue; ArgentinaFil: Sabino, G. A.. Universidad Nacional del Comahue. Facultad de Economía y Administración; ArgentinaFil: Forquera, J. C.. Universidad Nacional del Comahue. Facultad de Ciencias Agrarias; ArgentinaFil: de la Casa, Antonio Carlos. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Aisen, Eduardo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigaciones En Toxicología Ambiental y Agrobiotecnología del Comahue. Instituto de Biotecnología Agropecuaria del Comahue | Universidad Nacional del Comahue. Facultad de Cs.agrarias. Centro de Investigaciones En Toxicología Ambiental y Agrobiotecnología del Comahue. Instituto de Biotecnología Agropecuaria del Comahue; ArgentinaElsevier Science Inc2015-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/37736Lopez Armengol, Maria Fernanda; Sabino, G. A.; Forquera, J. C.; de la Casa, Antonio Carlos; Aisen, Eduardo Gabriel; Sperm head ellipticity as a heat stress indicator in Australian Merino rams (Ovis aries) in Northern Patagonia, Argentina; Elsevier Science Inc; Theriogenology; 83; 4; 3-2015; 553-5590093-691XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.theriogenology.2014.10.020info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0093691X14005731info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-11-12T09:58:22Zoai:ri.conicet.gov.ar:11336/37736instacron: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:34982025-11-12 09:58:22.334CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Sperm head ellipticity as a heat stress indicator in Australian Merino rams (Ovis aries) in Northern Patagonia, Argentina
title Sperm head ellipticity as a heat stress indicator in Australian Merino rams (Ovis aries) in Northern Patagonia, Argentina
spellingShingle Sperm head ellipticity as a heat stress indicator in Australian Merino rams (Ovis aries) in Northern Patagonia, Argentina
Lopez Armengol, Maria Fernanda
Heat Stress
Merino Ram
Sperm Head Ellipticity
Unshorn/Shorn
title_short Sperm head ellipticity as a heat stress indicator in Australian Merino rams (Ovis aries) in Northern Patagonia, Argentina
title_full Sperm head ellipticity as a heat stress indicator in Australian Merino rams (Ovis aries) in Northern Patagonia, Argentina
title_fullStr Sperm head ellipticity as a heat stress indicator in Australian Merino rams (Ovis aries) in Northern Patagonia, Argentina
title_full_unstemmed Sperm head ellipticity as a heat stress indicator in Australian Merino rams (Ovis aries) in Northern Patagonia, Argentina
title_sort Sperm head ellipticity as a heat stress indicator in Australian Merino rams (Ovis aries) in Northern Patagonia, Argentina
dc.creator.none.fl_str_mv Lopez Armengol, Maria Fernanda
Sabino, G. A.
Forquera, J. C.
de la Casa, Antonio Carlos
Aisen, Eduardo Gabriel
author Lopez Armengol, Maria Fernanda
author_facet Lopez Armengol, Maria Fernanda
Sabino, G. A.
Forquera, J. C.
de la Casa, Antonio Carlos
Aisen, Eduardo Gabriel
author_role author
author2 Sabino, G. A.
Forquera, J. C.
de la Casa, Antonio Carlos
Aisen, Eduardo Gabriel
author2_role author
author
author
author
dc.subject.none.fl_str_mv Heat Stress
Merino Ram
Sperm Head Ellipticity
Unshorn/Shorn
topic Heat Stress
Merino Ram
Sperm Head Ellipticity
Unshorn/Shorn
purl_subject.fl_str_mv https://purl.org/becyt/ford/4.2
https://purl.org/becyt/ford/4
dc.description.none.fl_txt_mv In Northern Patagonia, Argentina, the ovine mating season starts on March 15, which is the time when rams are submitted to summer temperatures. This study assessed the adaptability of 12 Australian Merino rams, six unshorn and six shorn, half of which were treated in a heat chamber for fivedays (09.00hours to 17.00hours) that gradually reached 40°C. In an attempt to quantify the effects of heat stress on sperm head morphology, ellipticity was analyzed to establish the relationship between the distributions of subpopulations, light hours, temperature and humidity. Ellipticity was measured on 9224 sperm heads that were obtained over 12 weeks starting in the summer time. Four sperm head subpopulations (S) were identified by comparison with a sperm head population of ejaculates obtained in the late breeding season without the effect of heat stress (S1=heads with ellipticity≥2.00; S2=sperm head with range of ellipticity between 1.80 and 1.99; S3=sperm head with range of ellipticity from 1.60 to 1.79; and S4=sperm head with range of ellipticity from 1.30 to 1.59). The variable sperm head ellipticity for each ejaculate was expressed as the means and frequencies of subpopulation. The results demonstrate changes in ram sperm head ellipticity in different conditions (control/treated, unshorn/shorn) throughout the experiment (P<0.05). Treated shorn rams had a higher mean ellipticity and frequency of elliptical heads (mean ellipticity value=2.06 and S1 frequency=76.35%), peaking in the seventh week posttreatment (on the basis of the action of heat stress on seminiferous tubules). According to this study, unshorn rams were better adapted to heat stress than the shorn ones.
Fil: Lopez Armengol, Maria Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigaciones En Toxicología Ambiental y Agrobiotecnología del Comahue. Instituto de Biotecnología Agropecuaria del Comahue | Universidad Nacional del Comahue. Facultad de Cs.agrarias. Centro de Investigaciones En Toxicología Ambiental y Agrobiotecnología del Comahue. Instituto de Biotecnología Agropecuaria del Comahue; Argentina
Fil: Sabino, G. A.. Universidad Nacional del Comahue. Facultad de Economía y Administración; Argentina
Fil: Forquera, J. C.. Universidad Nacional del Comahue. Facultad de Ciencias Agrarias; Argentina
Fil: de la Casa, Antonio Carlos. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Aisen, Eduardo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigaciones En Toxicología Ambiental y Agrobiotecnología del Comahue. Instituto de Biotecnología Agropecuaria del Comahue | Universidad Nacional del Comahue. Facultad de Cs.agrarias. Centro de Investigaciones En Toxicología Ambiental y Agrobiotecnología del Comahue. Instituto de Biotecnología Agropecuaria del Comahue; Argentina
description In Northern Patagonia, Argentina, the ovine mating season starts on March 15, which is the time when rams are submitted to summer temperatures. This study assessed the adaptability of 12 Australian Merino rams, six unshorn and six shorn, half of which were treated in a heat chamber for fivedays (09.00hours to 17.00hours) that gradually reached 40°C. In an attempt to quantify the effects of heat stress on sperm head morphology, ellipticity was analyzed to establish the relationship between the distributions of subpopulations, light hours, temperature and humidity. Ellipticity was measured on 9224 sperm heads that were obtained over 12 weeks starting in the summer time. Four sperm head subpopulations (S) were identified by comparison with a sperm head population of ejaculates obtained in the late breeding season without the effect of heat stress (S1=heads with ellipticity≥2.00; S2=sperm head with range of ellipticity between 1.80 and 1.99; S3=sperm head with range of ellipticity from 1.60 to 1.79; and S4=sperm head with range of ellipticity from 1.30 to 1.59). The variable sperm head ellipticity for each ejaculate was expressed as the means and frequencies of subpopulation. The results demonstrate changes in ram sperm head ellipticity in different conditions (control/treated, unshorn/shorn) throughout the experiment (P<0.05). Treated shorn rams had a higher mean ellipticity and frequency of elliptical heads (mean ellipticity value=2.06 and S1 frequency=76.35%), peaking in the seventh week posttreatment (on the basis of the action of heat stress on seminiferous tubules). According to this study, unshorn rams were better adapted to heat stress than the shorn ones.
publishDate 2015
dc.date.none.fl_str_mv 2015-03
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/11336/37736
Lopez Armengol, Maria Fernanda; Sabino, G. A.; Forquera, J. C.; de la Casa, Antonio Carlos; Aisen, Eduardo Gabriel; Sperm head ellipticity as a heat stress indicator in Australian Merino rams (Ovis aries) in Northern Patagonia, Argentina; Elsevier Science Inc; Theriogenology; 83; 4; 3-2015; 553-559
0093-691X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/37736
identifier_str_mv Lopez Armengol, Maria Fernanda; Sabino, G. A.; Forquera, J. C.; de la Casa, Antonio Carlos; Aisen, Eduardo Gabriel; Sperm head ellipticity as a heat stress indicator in Australian Merino rams (Ovis aries) in Northern Patagonia, Argentina; Elsevier Science Inc; Theriogenology; 83; 4; 3-2015; 553-559
0093-691X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.theriogenology.2014.10.020
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0093691X14005731
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
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
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score 13.24909

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