Thermoregulatory response in hair sheep and shorn wool sheep
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/19928 https://doi.org/Titto, C.G.; Veríssimo, C.J.; Pereira, A.M.F.; Geraldo, A.M.; Katiki, L.M.; Titto, E.A.L. (2016). Thermoregulatory response in hair sheep and shorn wool sheep. Small Ruminant Research, 144, 341-345. http://dx.doi.org/10.1016/j.smallrumres.2016.10.015 https://doi.org/http://dx.doi.org/10.1016/j.smallrumres.2016.10.015 |
Resumo: | This study’s main goal was to evaluate the thermoregulatory responses velocity through the variation of rectal temperature (RT), related to the thermolytic pathways, respiratory rate (RR) and sweating rate (SR) among different sheep breeds. Ninety female sheep, eighteen of each breed: Santa Ines and Morada Nova (Brazilian hair breeds), Texel, Suffolk and Ile de France (wool breeds) were challenged during three non-consecutive summer days (22◦42′S, 47◦18′W, and 570m of altitude, maximum air temperature of 33.5◦C, average relative humidity of 52±6.9%). The physiological variables were registered at 0800h (T1), 1300 h (T2: after 2 h of shade rest), 1400 h (T3) (after one hour of sun exposure) and in the shade at 1415 h (T4), 1430 h (T5), 1445 h (T6) and 1500 h (T7) and a thermotolerance index (TCI) was calculated as (10-(T7 to T4)-T1). The statistical analysis was performed by a mathematical model including the fixed effects of breeds and time frames, and the interaction between these effects, besides random effects such as animal and day. The Santa Ines breed presented the lowest RT after sun exposure (39.3 ± 0.12 ◦ C; P < 0.05) and it was the only one to recover morning RT 60 min after heat stress (38.7 and 38.9 for 1300 h and 1500 h; P > 0.05). Hair breeds presented RR lower (P < 0.05) than wool breeds. Although thick wool or hair thickness differs among and within hair and wool breeds (P < 0.05), SR did not differ among breeds and time (227.7 ± 16.44 g m−2 h−1 ; P > 0.05). The thermotolerance index did not differ among breeds, but it showed similar response (P > 0.05) 45 min or 1 h of shade after sun exposure. One week post shearing is not enough to wool breeds present to show thermotolerance similar to hair breeds. |
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Thermoregulatory response in hair sheep and shorn wool sheepheat stressSheepThis study’s main goal was to evaluate the thermoregulatory responses velocity through the variation of rectal temperature (RT), related to the thermolytic pathways, respiratory rate (RR) and sweating rate (SR) among different sheep breeds. Ninety female sheep, eighteen of each breed: Santa Ines and Morada Nova (Brazilian hair breeds), Texel, Suffolk and Ile de France (wool breeds) were challenged during three non-consecutive summer days (22◦42′S, 47◦18′W, and 570m of altitude, maximum air temperature of 33.5◦C, average relative humidity of 52±6.9%). The physiological variables were registered at 0800h (T1), 1300 h (T2: after 2 h of shade rest), 1400 h (T3) (after one hour of sun exposure) and in the shade at 1415 h (T4), 1430 h (T5), 1445 h (T6) and 1500 h (T7) and a thermotolerance index (TCI) was calculated as (10-(T7 to T4)-T1). The statistical analysis was performed by a mathematical model including the fixed effects of breeds and time frames, and the interaction between these effects, besides random effects such as animal and day. The Santa Ines breed presented the lowest RT after sun exposure (39.3 ± 0.12 ◦ C; P < 0.05) and it was the only one to recover morning RT 60 min after heat stress (38.7 and 38.9 for 1300 h and 1500 h; P > 0.05). Hair breeds presented RR lower (P < 0.05) than wool breeds. Although thick wool or hair thickness differs among and within hair and wool breeds (P < 0.05), SR did not differ among breeds and time (227.7 ± 16.44 g m−2 h−1 ; P > 0.05). The thermotolerance index did not differ among breeds, but it showed similar response (P > 0.05) 45 min or 1 h of shade after sun exposure. One week post shearing is not enough to wool breeds present to show thermotolerance similar to hair breeds.Elsevier2017-01-20T11:26:33Z2017-01-202016-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/19928https://doi.org/Titto, C.G.; Veríssimo, C.J.; Pereira, A.M.F.; Geraldo, A.M.; Katiki, L.M.; Titto, E.A.L. (2016). Thermoregulatory response in hair sheep and shorn wool sheep. Small Ruminant Research, 144, 341-345. http://dx.doi.org/10.1016/j.smallrumres.2016.10.015http://hdl.handle.net/10174/19928https://doi.org/http://dx.doi.org/10.1016/j.smallrumres.2016.10.015engndndapereira@uevora.ptndndnd207Titto, C.G.Veríssimo, C.J.Pereira, A.M.F.Geraldo, A.M.Katiki, L.M.Titto, E.A.L.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T19:09:26Zoai:dspace.uevora.pt:10174/19928Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:11:29.969555Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Thermoregulatory response in hair sheep and shorn wool sheep |
title |
Thermoregulatory response in hair sheep and shorn wool sheep |
spellingShingle |
Thermoregulatory response in hair sheep and shorn wool sheep Titto, C.G. heat stress Sheep |
title_short |
Thermoregulatory response in hair sheep and shorn wool sheep |
title_full |
Thermoregulatory response in hair sheep and shorn wool sheep |
title_fullStr |
Thermoregulatory response in hair sheep and shorn wool sheep |
title_full_unstemmed |
Thermoregulatory response in hair sheep and shorn wool sheep |
title_sort |
Thermoregulatory response in hair sheep and shorn wool sheep |
author |
Titto, C.G. |
author_facet |
Titto, C.G. Veríssimo, C.J. Pereira, A.M.F. Geraldo, A.M. Katiki, L.M. Titto, E.A.L. |
author_role |
author |
author2 |
Veríssimo, C.J. Pereira, A.M.F. Geraldo, A.M. Katiki, L.M. Titto, E.A.L. |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Titto, C.G. Veríssimo, C.J. Pereira, A.M.F. Geraldo, A.M. Katiki, L.M. Titto, E.A.L. |
dc.subject.por.fl_str_mv |
heat stress Sheep |
topic |
heat stress Sheep |
description |
This study’s main goal was to evaluate the thermoregulatory responses velocity through the variation of rectal temperature (RT), related to the thermolytic pathways, respiratory rate (RR) and sweating rate (SR) among different sheep breeds. Ninety female sheep, eighteen of each breed: Santa Ines and Morada Nova (Brazilian hair breeds), Texel, Suffolk and Ile de France (wool breeds) were challenged during three non-consecutive summer days (22◦42′S, 47◦18′W, and 570m of altitude, maximum air temperature of 33.5◦C, average relative humidity of 52±6.9%). The physiological variables were registered at 0800h (T1), 1300 h (T2: after 2 h of shade rest), 1400 h (T3) (after one hour of sun exposure) and in the shade at 1415 h (T4), 1430 h (T5), 1445 h (T6) and 1500 h (T7) and a thermotolerance index (TCI) was calculated as (10-(T7 to T4)-T1). The statistical analysis was performed by a mathematical model including the fixed effects of breeds and time frames, and the interaction between these effects, besides random effects such as animal and day. The Santa Ines breed presented the lowest RT after sun exposure (39.3 ± 0.12 ◦ C; P < 0.05) and it was the only one to recover morning RT 60 min after heat stress (38.7 and 38.9 for 1300 h and 1500 h; P > 0.05). Hair breeds presented RR lower (P < 0.05) than wool breeds. Although thick wool or hair thickness differs among and within hair and wool breeds (P < 0.05), SR did not differ among breeds and time (227.7 ± 16.44 g m−2 h−1 ; P > 0.05). The thermotolerance index did not differ among breeds, but it showed similar response (P > 0.05) 45 min or 1 h of shade after sun exposure. One week post shearing is not enough to wool breeds present to show thermotolerance similar to hair breeds. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-01-01T00:00:00Z 2017-01-20T11:26:33Z 2017-01-20 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10174/19928 https://doi.org/Titto, C.G.; Veríssimo, C.J.; Pereira, A.M.F.; Geraldo, A.M.; Katiki, L.M.; Titto, E.A.L. (2016). Thermoregulatory response in hair sheep and shorn wool sheep. Small Ruminant Research, 144, 341-345. http://dx.doi.org/10.1016/j.smallrumres.2016.10.015 http://hdl.handle.net/10174/19928 https://doi.org/http://dx.doi.org/10.1016/j.smallrumres.2016.10.015 |
url |
http://hdl.handle.net/10174/19928 https://doi.org/Titto, C.G.; Veríssimo, C.J.; Pereira, A.M.F.; Geraldo, A.M.; Katiki, L.M.; Titto, E.A.L. (2016). Thermoregulatory response in hair sheep and shorn wool sheep. Small Ruminant Research, 144, 341-345. http://dx.doi.org/10.1016/j.smallrumres.2016.10.015 https://doi.org/http://dx.doi.org/10.1016/j.smallrumres.2016.10.015 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
nd nd apereira@uevora.pt nd nd nd 207 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799136597019459584 |