Effect of early shearing during gestation on the productive and reproductive behavior of female sheep offspring in their first 18 months of age
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1017/S1751731119002441 http://hdl.handle.net/11449/221450 |
Resumo: | The research has shown the interesting contributions of shearing in mid-gestation on the performance of lambs from birth to weaning. Other studies have reported that shearing at early pregnancy influences the development of the placenta and lamb live weight at birth. However, there was a lack of information on the effect of early-prepartum shearing on the behavior of the offspring from weaning onward. This study evaluated the effect of shearing ewes at 50 days of gestation on the growth, reproductive behavior and response to a gastrointestinal parasite challenge in the female offspring from weaning to 18 months old. Fifty-seven Polwarth female lambs were used, 22 being singles and 35 twins born to ewes either shorn at 50 days of pregnancy (PS, n = 23) or shorn at 62 days postpartum (U, control, n = 34) resulting in four subgroups: single lambs born to PS ewes (n = 8), born to U ewes (n = 14), twin lambs born to PS ewes (n = 15) or born to U ewes (n = 20). All progeny were managed together under improved pasture with a minimum forage allowance of 6% live weight on dry basis. Body weight, body condition score and fecal eggs count were recorded every 14 days from weaning to 18 months of age. Concentrations of progesterone were measured weekly (from 4 to 10 months of age and from 14 to 18 months of age) to establish the onset of puberty. Ovulation rate at an induced and a natural heat (545 ± 1.0 and 562 ± 1.0 day old) was recorded. Prepartum shearing did not affect the age at puberty or the ovulation rate of female offspring, but those born as singles were more precocious ( P = 0.03) and heavier ( P = 0.02) at puberty than twin born lambs. Both the average value of parasite egg count ( P = 0.0 7) and the Famacha index ( P = 0.02) for the entire study period were lower in lambs born to prepartum shorn ewes than those born to postpartum shorn ewes. In conclusion, shearing at 50 days of gestation did not affect the growth or the reproductive behavior of female offspring. However, female lambs born from ewe shorn during gestation showed a better response to the parasitic challenge, and further research is required to confirm this. |
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Effect of early shearing during gestation on the productive and reproductive behavior of female sheep offspring in their first 18 months of ageearly shearingfemale progenygrowthimmunityreproductionThe research has shown the interesting contributions of shearing in mid-gestation on the performance of lambs from birth to weaning. Other studies have reported that shearing at early pregnancy influences the development of the placenta and lamb live weight at birth. However, there was a lack of information on the effect of early-prepartum shearing on the behavior of the offspring from weaning onward. This study evaluated the effect of shearing ewes at 50 days of gestation on the growth, reproductive behavior and response to a gastrointestinal parasite challenge in the female offspring from weaning to 18 months old. Fifty-seven Polwarth female lambs were used, 22 being singles and 35 twins born to ewes either shorn at 50 days of pregnancy (PS, n = 23) or shorn at 62 days postpartum (U, control, n = 34) resulting in four subgroups: single lambs born to PS ewes (n = 8), born to U ewes (n = 14), twin lambs born to PS ewes (n = 15) or born to U ewes (n = 20). All progeny were managed together under improved pasture with a minimum forage allowance of 6% live weight on dry basis. Body weight, body condition score and fecal eggs count were recorded every 14 days from weaning to 18 months of age. Concentrations of progesterone were measured weekly (from 4 to 10 months of age and from 14 to 18 months of age) to establish the onset of puberty. Ovulation rate at an induced and a natural heat (545 ± 1.0 and 562 ± 1.0 day old) was recorded. Prepartum shearing did not affect the age at puberty or the ovulation rate of female offspring, but those born as singles were more precocious ( P = 0.03) and heavier ( P = 0.02) at puberty than twin born lambs. Both the average value of parasite egg count ( P = 0.0 7) and the Famacha index ( P = 0.02) for the entire study period were lower in lambs born to prepartum shorn ewes than those born to postpartum shorn ewes. In conclusion, shearing at 50 days of gestation did not affect the growth or the reproductive behavior of female offspring. However, female lambs born from ewe shorn during gestation showed a better response to the parasitic challenge, and further research is required to confirm this.Department of Animal Production and Pastures Faculty of Agronomy, Av. Garzón 780Faculdade de Ciencias Agrárias e Veterinárias, Via de Acesso Castellane s/nNational Institute for Agricultural Research, Ruta 8Sheep Research Centre Institute of Veterinary Animal and Biomedical Sciences Massey UniversityDepartment of Veterinary Parasitology Veterinary Faculty, Las places 1550National Institute for Agricultural Research, Ruta 50 ColoniaFaculty of AgronomyFaculdade de Ciencias Agrárias e VeterináriasNational Institute for Agricultural ResearchMassey UniversityVeterinary FacultyLópez-Mazz, C.Baldi, F.Quintans, G.Kenyon, P. R.Correa, O.Regueiro, M.Álvarez-Oxiley, A.Banchero, G. E.2022-04-28T19:28:33Z2022-04-28T19:28:33Z2020-04-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article807-813http://dx.doi.org/10.1017/S1751731119002441Animal, v. 14, n. 4, p. 807-813, 2020.1751-732X1751-7311http://hdl.handle.net/11449/22145010.1017/S17517311190024412-s2.0-85081990468Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAnimalinfo:eu-repo/semantics/openAccess2022-04-28T19:28:33Zoai:repositorio.unesp.br:11449/221450Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:52:40.158862Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Effect of early shearing during gestation on the productive and reproductive behavior of female sheep offspring in their first 18 months of age |
title |
Effect of early shearing during gestation on the productive and reproductive behavior of female sheep offspring in their first 18 months of age |
spellingShingle |
Effect of early shearing during gestation on the productive and reproductive behavior of female sheep offspring in their first 18 months of age López-Mazz, C. early shearing female progeny growth immunity reproduction |
title_short |
Effect of early shearing during gestation on the productive and reproductive behavior of female sheep offspring in their first 18 months of age |
title_full |
Effect of early shearing during gestation on the productive and reproductive behavior of female sheep offspring in their first 18 months of age |
title_fullStr |
Effect of early shearing during gestation on the productive and reproductive behavior of female sheep offspring in their first 18 months of age |
title_full_unstemmed |
Effect of early shearing during gestation on the productive and reproductive behavior of female sheep offspring in their first 18 months of age |
title_sort |
Effect of early shearing during gestation on the productive and reproductive behavior of female sheep offspring in their first 18 months of age |
author |
López-Mazz, C. |
author_facet |
López-Mazz, C. Baldi, F. Quintans, G. Kenyon, P. R. Correa, O. Regueiro, M. Álvarez-Oxiley, A. Banchero, G. E. |
author_role |
author |
author2 |
Baldi, F. Quintans, G. Kenyon, P. R. Correa, O. Regueiro, M. Álvarez-Oxiley, A. Banchero, G. E. |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Faculty of Agronomy Faculdade de Ciencias Agrárias e Veterinárias National Institute for Agricultural Research Massey University Veterinary Faculty |
dc.contributor.author.fl_str_mv |
López-Mazz, C. Baldi, F. Quintans, G. Kenyon, P. R. Correa, O. Regueiro, M. Álvarez-Oxiley, A. Banchero, G. E. |
dc.subject.por.fl_str_mv |
early shearing female progeny growth immunity reproduction |
topic |
early shearing female progeny growth immunity reproduction |
description |
The research has shown the interesting contributions of shearing in mid-gestation on the performance of lambs from birth to weaning. Other studies have reported that shearing at early pregnancy influences the development of the placenta and lamb live weight at birth. However, there was a lack of information on the effect of early-prepartum shearing on the behavior of the offspring from weaning onward. This study evaluated the effect of shearing ewes at 50 days of gestation on the growth, reproductive behavior and response to a gastrointestinal parasite challenge in the female offspring from weaning to 18 months old. Fifty-seven Polwarth female lambs were used, 22 being singles and 35 twins born to ewes either shorn at 50 days of pregnancy (PS, n = 23) or shorn at 62 days postpartum (U, control, n = 34) resulting in four subgroups: single lambs born to PS ewes (n = 8), born to U ewes (n = 14), twin lambs born to PS ewes (n = 15) or born to U ewes (n = 20). All progeny were managed together under improved pasture with a minimum forage allowance of 6% live weight on dry basis. Body weight, body condition score and fecal eggs count were recorded every 14 days from weaning to 18 months of age. Concentrations of progesterone were measured weekly (from 4 to 10 months of age and from 14 to 18 months of age) to establish the onset of puberty. Ovulation rate at an induced and a natural heat (545 ± 1.0 and 562 ± 1.0 day old) was recorded. Prepartum shearing did not affect the age at puberty or the ovulation rate of female offspring, but those born as singles were more precocious ( P = 0.03) and heavier ( P = 0.02) at puberty than twin born lambs. Both the average value of parasite egg count ( P = 0.0 7) and the Famacha index ( P = 0.02) for the entire study period were lower in lambs born to prepartum shorn ewes than those born to postpartum shorn ewes. In conclusion, shearing at 50 days of gestation did not affect the growth or the reproductive behavior of female offspring. However, female lambs born from ewe shorn during gestation showed a better response to the parasitic challenge, and further research is required to confirm this. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-04-01 2022-04-28T19:28:33Z 2022-04-28T19:28:33Z |
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://dx.doi.org/10.1017/S1751731119002441 Animal, v. 14, n. 4, p. 807-813, 2020. 1751-732X 1751-7311 http://hdl.handle.net/11449/221450 10.1017/S1751731119002441 2-s2.0-85081990468 |
url |
http://dx.doi.org/10.1017/S1751731119002441 http://hdl.handle.net/11449/221450 |
identifier_str_mv |
Animal, v. 14, n. 4, p. 807-813, 2020. 1751-732X 1751-7311 10.1017/S1751731119002441 2-s2.0-85081990468 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Animal |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
807-813 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128869609242624 |