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Metadados | Descrição | Idioma |
---|---|---|
Autor(es): dc.contributor | Univ British Columbia | - |
Autor(es): dc.contributor | Univ Guelph | - |
Autor(es): dc.contributor | Texas A&M Univ | - |
Autor(es): dc.contributor | Universidade Estadual Paulista (Unesp) | - |
Autor(es): dc.contributor | Zoetis Inc | - |
Autor(es): dc.contributor | Vector Consulting | - |
Autor(es): dc.creator | Cerri, R. L. A. | - |
Autor(es): dc.creator | Burnett, T. A. | - |
Autor(es): dc.creator | Madureira, A. M. L. | - |
Autor(es): dc.creator | Silper, B. F. | - |
Autor(es): dc.creator | Denis-Robichaud, J. | - |
Autor(es): dc.creator | LeBlanc, S. | - |
Autor(es): dc.creator | Cooke, R. F. | - |
Autor(es): dc.creator | Vasconcelos, J. L. M. [UNESP] | - |
Data de aceite: dc.date.accessioned | 2022-02-22T00:57:40Z | - |
Data de disponibilização: dc.date.available | 2022-02-22T00:57:40Z | - |
Data de envio: dc.date.issued | 2021-06-25 | - |
Data de envio: dc.date.issued | 2021-06-25 | - |
Data de envio: dc.date.issued | 2020-12-31 | - |
Fonte completa do material: dc.identifier | http://dx.doi.org/10.3168/jds.2019-17893 | - |
Fonte completa do material: dc.identifier | http://hdl.handle.net/11449/209804 | - |
Fonte: dc.identifier.uri | http://educapes.capes.gov.br/handle/11449/209804 | - |
Descrição: dc.description | Several studies have demonstrated that the intensity of estrous expression is associated with ovulation, ovarian and uterine function, and fertility, and is dependent on social hierarchy and the housing system used. Data from recent studies involving spontaneous and induced estrus have shown that a greater relative increase and longer estrus (captured by different automated activity monitors; AAM) are both associated with improved pregnancy per artificial insemination (AI; around 10 to 14% increase) and decreased pregnancy losses. Intensity and duration of estrus were surprisingly weakly associated with preovulatory follicle diameter and concentrations of plasma estradiol at estrus, whereas ovulation failure was associated with low estrus intensity. Studies have also shown that the display of estrous behavior near AI was associated with the modification of expression of genes related to the immune system, adhesion molecules, and prostaglandin synthesis in the endometrium. Transcripts in leukocytes and in the conceptus tissue associated with maternal recognition of pregnancy as well as conceptus elongation were all associated with differences in the intensity of estrous expression. Most recently, studies from the United States and Canada have demonstrated that reproductive programs emphasizing detection of estrus using AAM can be successful and comparable to intensive timed AI protocol-based programs that incorporate GnRH and PGF(2 alpha) treatments. Further, one study concluded that the administration of GnRH at AI for spontaneous estrus events greatly improved pregnancy per AI, but only for cows with reduced intensity of estrous expression, showing the potential to use AAM data as a tool in targeted reproductive programs. Quantitative information from estrus events could be used to improve estrus detection and develop decision-making strategies at the farm level. Future studies in this field should aim to better understand ovarian, conceptus, and endometrial mechanisms associated with either the expression or the intensity of estrus, and to refine the identification of phenotypes related to estrus (relative increase, absolute increase, baseline levels, duration, and repeatability within cow) to improve data usage, estrus detection, and possibly genetic selection. | - |
Descrição: dc.description | Dairy Research Cluster Initiative II [Dairy Farmers of Canada (Ottawa, Canada)] | - |
Descrição: dc.description | Agriculture and Agri-Food Canada (Ottawa, Canada) | - |
Descrição: dc.description | Lactanet (Guelph, Canada) | - |
Descrição: dc.description | Canadian Dairy Commission (Ottawa, Canada) | - |
Descrição: dc.description | Natural Sciences and Engineering Research Council of Canada (Ottawa, Canada) | - |
Descrição: dc.description | Mitacs (Ottawa, Canada) | - |
Descrição: dc.description | B.C. Dairy Association (Burnaby, Canada) | - |
Descrição: dc.description | Westgen Endowment Fund | - |
Descrição: dc.description | Univ British Columbia, Fac Land & Food Syst, Appl Anim Biol, Vancouver, BC V6T 1Z4, Canada | - |
Descrição: dc.description | Univ Guelph, Dept Populat Med, Guelph, ON N1G 2W1, Canada | - |
Descrição: dc.description | Texas A&M Univ, Coll Agr & Life Sci, Dept Anim Sci, College Stn, TX 77843 USA | - |
Descrição: dc.description | Sao Paulo State Univ, Fac Vet Med & Anim Sci, Dept Anim Prod, BR-18160000 Botucatu, SP, Brazil | - |
Descrição: dc.description | Zoetis Inc, Sao Paulo, SP, Brazil | - |
Descrição: dc.description | Vector Consulting, Amqui, PQ, Canada | - |
Descrição: dc.description | Sao Paulo State Univ, Fac Vet Med & Anim Sci, Dept Anim Prod, BR-18160000 Botucatu, SP, Brazil | - |
Formato: dc.format | 1220-1231 | - |
Idioma: dc.language | en | - |
Publicador: dc.publisher | Elsevier B.V. | - |
Relação: dc.relation | Journal Of Dairy Science | - |
???dc.source???: dc.source | Web of Science | - |
Palavras-chave: dc.subject | activity monitors | - |
Palavras-chave: dc.subject | estrus | - |
Palavras-chave: dc.subject | dairy cow | - |
Palavras-chave: dc.subject | precision dairy technologies | - |
Título: dc.title | Linking activity-sensor data and physiology to improve dairy cow fertility | - |
Aparece nas coleções: | Repositório Institucional - Unesp |
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