Effect of early shearing during gestation on the productive and reproductive behavior of female sheep offspring in their first 18 months of age

Detalhes bibliográficos
Autor(a) principal: López-Mazz, C.
Data de Publicação: 2020
Outros Autores: Baldi, F., Quintans, G., Kenyon, P. R., Correa, O., Regueiro, M., Álvarez-Oxiley, A., Banchero, G. E.
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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spelling 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
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