Bimodal milk flow and overmilking in dairy cattle : risk factors and consequences

Detalhes bibliográficos
Autor(a) principal: Fernandes, S.
Data de Publicação: 2023
Outros Autores: Pereira, G., Bexiga, Ricardo
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.5/27789
Resumo: Research Areas: Agriculture ; Veterinary Sciences
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spelling Bimodal milk flow and overmilking in dairy cattle : risk factors and consequencesDairy cowMilk flowMilking efficiencyStimulation timResearch Areas: Agriculture ; Veterinary SciencesTo maximise the return on capital invested in the milking parlour, the largest number of cows should be milked gently and completely in the shortest possible time. Bimodal milk flow and overmilking negatively influence the efficiency of the milk removal process and teat health. This observational study had the objective of investigating the prevalence of bimodal milk flow and overmilking, determining which individual and farm-related variables are associated with these occurrences, and determining the association of overmilking and bimodal milk flow with milk yield and with short- and long-term teat changes. Twenty-one farms were visited once during the study period, wherein the milking routine was timed, the teat condition was assessed, and dynamic evaluation of the milking vacuum was performed. A total of 606 vacuum graphic records were obtained, with an average of 29 ± 3 records per farm, in order to indirectly evaluate the milk flow and thus determine the occurrence of bimodal milking and overmilking time. The average percentage of bimodality per farm was 41.7%. The median overmilking time was 59 seconds, and on average, 78.3% of the cows in a herd were overmilked longer than 30 seconds. An association was found at cow level between the occurrence of bimodal milk flow and days in milk, the total stimulation time, parity, and the preparation lag time. The increase in the mean total stimulation time and the number of passes during preparation were associated with a decrease in the proportion of bimodality in the herd. Parity, reattachment of the milking unit and milking in manual mode were associated with an increase in overmilking time of an individual cow. The presence of a clogged air bleed hole in the claw and the reduction of the cluster removal milk flow threshold were associated with an increase in the herd’s median overmilking time. The average milk flow decreased with the increase in overmilking time and with the occurrence of bimodal milk flow. An association was also found between the occurrence of bimodal milk flow and decreased milk yield. A mean of 78.4% of cows per farm had shortterm teat changes in at least one teat, and 33.6% of evaluated cows per farm displayed at least one teat with hyperkeratosis. These results emphasise the association of bimodality and overmilking on milking efficiency and reinforce the importance of the milkers’ actions and the functioning of the milking parlour for its preventionElsevierRepositório da Universidade de LisboaFernandes, S.Pereira, G.Bexiga, Ricardo2023-05-21T18:34:27Z2023-01-202023-01-20T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.5/27789engFernandes S, Pereira G, Bexiga R. 2023. Bimodal milk flow and overmilking in dairy cattle: risk factors and consequences. Animal, 17(4):100716. DOI10.1016/j.animal.2023.1007161751-731110.1016/j.animal.2023.1007161751-732Xinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-05-28T01:31:10Zoai:www.repository.utl.pt:10400.5/27789Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:56:28.395821Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Bimodal milk flow and overmilking in dairy cattle : risk factors and consequences
title Bimodal milk flow and overmilking in dairy cattle : risk factors and consequences
spellingShingle Bimodal milk flow and overmilking in dairy cattle : risk factors and consequences
Fernandes, S.
Dairy cow
Milk flow
Milking efficiency
Stimulation tim
title_short Bimodal milk flow and overmilking in dairy cattle : risk factors and consequences
title_full Bimodal milk flow and overmilking in dairy cattle : risk factors and consequences
title_fullStr Bimodal milk flow and overmilking in dairy cattle : risk factors and consequences
title_full_unstemmed Bimodal milk flow and overmilking in dairy cattle : risk factors and consequences
title_sort Bimodal milk flow and overmilking in dairy cattle : risk factors and consequences
author Fernandes, S.
author_facet Fernandes, S.
Pereira, G.
Bexiga, Ricardo
author_role author
author2 Pereira, G.
Bexiga, Ricardo
author2_role author
author
dc.contributor.none.fl_str_mv Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Fernandes, S.
Pereira, G.
Bexiga, Ricardo
dc.subject.por.fl_str_mv Dairy cow
Milk flow
Milking efficiency
Stimulation tim
topic Dairy cow
Milk flow
Milking efficiency
Stimulation tim
description Research Areas: Agriculture ; Veterinary Sciences
publishDate 2023
dc.date.none.fl_str_mv 2023-05-21T18:34:27Z
2023-01-20
2023-01-20T00:00:00Z
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://hdl.handle.net/10400.5/27789
url http://hdl.handle.net/10400.5/27789
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Fernandes S, Pereira G, Bexiga R. 2023. Bimodal milk flow and overmilking in dairy cattle: risk factors and consequences. Animal, 17(4):100716. DOI10.1016/j.animal.2023.100716
1751-7311
10.1016/j.animal.2023.100716
1751-732X
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
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collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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