Can cover sheath model influence semen retention in AI-gun trials and pregnancy rates of cows inseminated at a fixed-time?

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUNISA-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorNorte Consultoria Agropecuária-
Autor(es): dc.contributorGeneplan Reprodução Bovina-
Autor(es): dc.contributorUniversity of British Columbia-
Autor(es): dc.creatorCrespilho, André Maciel-
Autor(es): dc.creatorSegabinazzi, Lorenzo Garrido [UNESP]-
Autor(es): dc.creatorPinto, Helton Nunes-
Autor(es): dc.creatorCamargo, Tiago-
Autor(es): dc.creatorFerreira, Cristiano Silva-
Autor(es): dc.creatorCavalheiro, Igor-
Autor(es): dc.creatorda Cunha Peixoto Junior, Kleber-
Autor(es): dc.creatorCerri, Ronaldo Aoki-
Data de aceite: dc.date.accessioned2022-02-22T00:27:16Z-
Data de disponibilização: dc.date.available2022-02-22T00:27:16Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-10-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.5433/1679-0359.2020v41n5p1601-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/199404-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/199404-
Descrição: dc.descriptionThe achievement of satisfactory results in fixed-time artificial insemination (FTAI) protocols depends on several factors, such as the quality of the materials used to perform the artificial insemination (AI). In this context, three experiments were conducted to evaluate the effect of the cover sheath model on the residual retention of semen during AI and the pregnancy rates of cows submitted to FTAI. In Experiment 1, 400 straws of cryopreserved bovine semen were thawed and repacked in samples with similar weight and volume characteristics. Each new dose of semen (n = 300) was mounted using one of three AI cover sheath models (n = 100 semen/sheath doses): the main brand in the global market (G1), the main model in the Brazilian market (G2), and a model marketed as having a low residual semen retention rate (G3), to determine the percentages of seminal elimination (PSEs) during AI. In Experiment 2, 464 Nelore cows were synchronized through intravaginal progesterone implants and inseminated using the same cover sheaths as those tested in Experiment 1, which were grouped into classes (conventional: G1 and G2 [n = 225]; and low reflux: G3 [n = 239]). In Experiment 3, 859 Nelore cows were synchronized and inseminated as described above, using the same cover sheaths previously tested. After each AI, cover sheaths were visually inspected for the presence of residual semen and pregnancy diagnosis was performed 35 days after FTAI (Experiments 2 and 3). The PSEs in Experiment 1 were 91.7%, 90.6% and 96.5% for groups G1, G2 and G3, respectively (P = 0.05). The pregnancy rates in Experiment 2 were 53.33% and 58.16% for the conventional and low reflux model, respectively (P > 0.05), but there were differences (P = 0.05) among the cover sheath models employed for AI (G1 - 57.72% [71/123]; G2 - 48.04% [49/102]; G3 - 58.16% [139/239]). Additionally, a lower semen reflux incidence (P < 0.05) was observed in the low residual sperm retention model (0.72%) in Experiment 3, compared to the main international (10.42%) and national (22.99%) market models. In conclusion, residual semen retention occurs regardless of the cover sheath model used for AI. However, the PSE is influenced by the model and quality of cover sheath used. According to the results, the cover sheath represents a factor that may compromise the pregnancy rates of synchronized cows for FTAI.-
Descrição: dc.descriptionPrograma de Mestrado em Medicina Veterinária e Bem-Estar Animal Universidade Santo Amaro UNISA-
Descrição: dc.descriptionPrograma de Pós-Graduação em Biotecnologia Animal Faculdade de Medicina Veterinária e Zootecnia FMVZ/ UNESP-
Descrição: dc.descriptionNorte Consultoria Agropecuária-
Descrição: dc.descriptionPrograma de Mestrado em Medicina Veterinária e Bem-Estar Animal UNISA-
Descrição: dc.descriptionGeneplan Reprodução Bovina-
Descrição: dc.descriptionApplied Animal Biology Program Faculty of Land and Food Systems University of British Columbia-
Descrição: dc.descriptionPrograma de Pós-Graduação em Biotecnologia Animal Faculdade de Medicina Veterinária e Zootecnia FMVZ/ UNESP-
Formato: dc.format1601-1612-
Idioma: dc.languageen-
Relação: dc.relationSemina:Ciencias Agrarias-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectArtificial insemination-
Palavras-chave: dc.subjectBeef cattle-
Palavras-chave: dc.subjectBovine-
Palavras-chave: dc.subjectConception rates-
Palavras-chave: dc.subjectFTAI-
Título: dc.titleCan cover sheath model influence semen retention in AI-gun trials and pregnancy rates of cows inseminated at a fixed-time?-
Título: dc.titleA bainha utilizada na inseminação artificial (IA) pode influenciar a retenção residual de sêmen e as taxas de concepção de vacas inseminadas em tempo fixo?-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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