Effect of temporary calf removal numbers in timed artificial insemination protocols on weaning weight from nelore calves
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.5380/avs.v18i2.28476 http://hdl.handle.net/11449/220064 |
Resumo: | This study was conducted to evaluate the effect on the weaning weight of Nelore calves from two factors: the number of times the calves were temporarily removed from their mothers during a timed artificial insemination (TAI), and the month of birth. Attention was given to any possible interaction between these factors. Suckled beef Nelore cows (n= 271) with more than 30 days postpartum were synchronized to a TAI protocol as follows: Day 0: insertion of intravaginal progesterone device ± 2.0 mg of estradiol benzoate; Day 7: application of 12.5 mg of dinoprost tromethamine; Day 9: removal of progesterone device ± 1.0 mg of estradiol cypionate ± temporary calf removal (TCR); Day 11: TAI ± return of the calves to cows. The calves whose mothers conceived after the first insemination were subjected to TCR once, those found empty after 30 days were resynchronized and inseminated according to the TAI protocol and thus, their calves were subjected to TCR a second time. The weaning weight was adjusted to 210 days. Statistical variance analysis was performed by SAS statistics program. It was observed that there was no effect from the number of removals on the weaning weight (P > 0.05); on the other hand, the month of birth did affect it (P < 0.05). In conclusion, the number of TCŔs for TAI protocols during the breeding season did not impact the weaning weight of the calves. However, the month of birth did affect the weaning weight of beef calves, since those born at the beginning of the birth season were heavier. |
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Effect of temporary calf removal numbers in timed artificial insemination protocols on weaning weight from nelore calvesBeef cowsReproductionReproductive managementSynchronizationThis study was conducted to evaluate the effect on the weaning weight of Nelore calves from two factors: the number of times the calves were temporarily removed from their mothers during a timed artificial insemination (TAI), and the month of birth. Attention was given to any possible interaction between these factors. Suckled beef Nelore cows (n= 271) with more than 30 days postpartum were synchronized to a TAI protocol as follows: Day 0: insertion of intravaginal progesterone device ± 2.0 mg of estradiol benzoate; Day 7: application of 12.5 mg of dinoprost tromethamine; Day 9: removal of progesterone device ± 1.0 mg of estradiol cypionate ± temporary calf removal (TCR); Day 11: TAI ± return of the calves to cows. The calves whose mothers conceived after the first insemination were subjected to TCR once, those found empty after 30 days were resynchronized and inseminated according to the TAI protocol and thus, their calves were subjected to TCR a second time. The weaning weight was adjusted to 210 days. Statistical variance analysis was performed by SAS statistics program. It was observed that there was no effect from the number of removals on the weaning weight (P > 0.05); on the other hand, the month of birth did affect it (P < 0.05). In conclusion, the number of TCŔs for TAI protocols during the breeding season did not impact the weaning weight of the calves. However, the month of birth did affect the weaning weight of beef calves, since those born at the beginning of the birth season were heavier.UNESP-Campus Júlio Mesquita FilhoUFUUNESP-Campus Júlio Mesquita FilhoUniversidade Estadual Paulista (UNESP)UFUCarneiro, Luisa Cunha [UNESP]Campos, Carla CrisitanSantos, Ricarda Maria2022-04-28T18:59:23Z2022-04-28T18:59:23Z2013-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article09-14http://dx.doi.org/10.5380/avs.v18i2.28476Archives of Veterinary Science, v. 18, n. 2, p. 09-14, 2013.1517-784Xhttp://hdl.handle.net/11449/22006410.5380/avs.v18i2.284762-s2.0-84893499606Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengArchives of Veterinary Scienceinfo:eu-repo/semantics/openAccess2022-04-28T18:59:23Zoai:repositorio.unesp.br:11449/220064Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-04-28T18:59:23Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Effect of temporary calf removal numbers in timed artificial insemination protocols on weaning weight from nelore calves |
title |
Effect of temporary calf removal numbers in timed artificial insemination protocols on weaning weight from nelore calves |
spellingShingle |
Effect of temporary calf removal numbers in timed artificial insemination protocols on weaning weight from nelore calves Carneiro, Luisa Cunha [UNESP] Beef cows Reproduction Reproductive management Synchronization |
title_short |
Effect of temporary calf removal numbers in timed artificial insemination protocols on weaning weight from nelore calves |
title_full |
Effect of temporary calf removal numbers in timed artificial insemination protocols on weaning weight from nelore calves |
title_fullStr |
Effect of temporary calf removal numbers in timed artificial insemination protocols on weaning weight from nelore calves |
title_full_unstemmed |
Effect of temporary calf removal numbers in timed artificial insemination protocols on weaning weight from nelore calves |
title_sort |
Effect of temporary calf removal numbers in timed artificial insemination protocols on weaning weight from nelore calves |
author |
Carneiro, Luisa Cunha [UNESP] |
author_facet |
Carneiro, Luisa Cunha [UNESP] Campos, Carla Crisitan Santos, Ricarda Maria |
author_role |
author |
author2 |
Campos, Carla Crisitan Santos, Ricarda Maria |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) UFU |
dc.contributor.author.fl_str_mv |
Carneiro, Luisa Cunha [UNESP] Campos, Carla Crisitan Santos, Ricarda Maria |
dc.subject.por.fl_str_mv |
Beef cows Reproduction Reproductive management Synchronization |
topic |
Beef cows Reproduction Reproductive management Synchronization |
description |
This study was conducted to evaluate the effect on the weaning weight of Nelore calves from two factors: the number of times the calves were temporarily removed from their mothers during a timed artificial insemination (TAI), and the month of birth. Attention was given to any possible interaction between these factors. Suckled beef Nelore cows (n= 271) with more than 30 days postpartum were synchronized to a TAI protocol as follows: Day 0: insertion of intravaginal progesterone device ± 2.0 mg of estradiol benzoate; Day 7: application of 12.5 mg of dinoprost tromethamine; Day 9: removal of progesterone device ± 1.0 mg of estradiol cypionate ± temporary calf removal (TCR); Day 11: TAI ± return of the calves to cows. The calves whose mothers conceived after the first insemination were subjected to TCR once, those found empty after 30 days were resynchronized and inseminated according to the TAI protocol and thus, their calves were subjected to TCR a second time. The weaning weight was adjusted to 210 days. Statistical variance analysis was performed by SAS statistics program. It was observed that there was no effect from the number of removals on the weaning weight (P > 0.05); on the other hand, the month of birth did affect it (P < 0.05). In conclusion, the number of TCŔs for TAI protocols during the breeding season did not impact the weaning weight of the calves. However, the month of birth did affect the weaning weight of beef calves, since those born at the beginning of the birth season were heavier. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-01-01 2022-04-28T18:59:23Z 2022-04-28T18:59:23Z |
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/10.5380/avs.v18i2.28476 Archives of Veterinary Science, v. 18, n. 2, p. 09-14, 2013. 1517-784X http://hdl.handle.net/11449/220064 10.5380/avs.v18i2.28476 2-s2.0-84893499606 |
url |
http://dx.doi.org/10.5380/avs.v18i2.28476 http://hdl.handle.net/11449/220064 |
identifier_str_mv |
Archives of Veterinary Science, v. 18, n. 2, p. 09-14, 2013. 1517-784X 10.5380/avs.v18i2.28476 2-s2.0-84893499606 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Archives of Veterinary Science |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
09-14 |
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_ |
1799965599161384960 |