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Akademický článek

Rumen-protected methionine supplementation during the transition period under artificially induced heat stress: Effects on cow-calf performance

Autor: B.D. Davidson, A.A. Zambon, A.R. Guadagnin, A. Hoppmann, G.A. Larsen, D.N. Sherlock, D. Luchini, S.I. Arriola Apelo, J. Laporta

Publikováno v: Journal of Dairy Science, Vol 107, Iss 10, Pp 8654-8669 (2024)

ABSTRACT: Dairy cows experiencing heat stress (HS) during the precalving portion of the transition period give birth to smaller calves and produce less milk and milk protein. Supplementation of rumen-protected methionine (RPM) has been shown to modul

Externí odkaz: https://doaj.org/article/a6f8144f8df8469aa19212debac749fd

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Akademický článek

Review: Phenotypic and molecular evidence of inter- and trans-generational effects of heat stress in livestock mammals and humans

Autor: J. Laporta, H. Khatib, M. Zachut

Publikováno v: Animal, Vol 18, Iss , Pp 101121- (2024)

Internal and external factors can change an individual's phenotype. A significant external threat to humans and livestock is environmental heat load, a combination of high ambient temperatures and humidity. A heat stress response occurs when an endot

Externí odkaz: https://doaj.org/article/3bfbe1d03e29494a84c2b78485682629

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Akademický článek

Late-gestation heat stress in Holstein dams programs in utero development of daughter's germline, triggering skin and hair morphology adaptations of granddaughters

Autor: B.D. Davidson, E.T. Gonzales, G.L. Mast, J. Laporta

Publikováno v: JDS Communications, Vol 5, Iss 1, Pp 83-88 (2024)

Homeostasis and thermoregulation are influenced by the interplay of hair coat and skin characteristics. Our previous work indicated that hair and skin adaptations, triggered by in utero heat stress, affect thermoregulation in postnatal life. Herein,

Externí odkaz: https://doaj.org/article/6e05b9dce29c4b26a8e927ed28ee0218

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Akademický článek

Unraveling the immune and metabolic changes associated with metritis in dairy cows

Autor: S. Casaro, J.G. Prim, T.D. Gonzalez, R.S. Bisinotto, R.C. Chebel, M.G. Marrero, A.C.M. Silva, J.E.P. Santos, C.D. Nelson, J. Laporta, S.J. Jeon, R.C. Bicalho, J.P. Driver, K.N. Galvão

Publikováno v: Journal of Dairy Science, Vol 106, Iss 12, Pp 9244-9259 (2023)

ABSTRACT: The objective was to unravel the peripartum immune and metabolic changes associated with metritis in Holstein cows. Holstein cows (n = 128) had blood collected at −14, 0, 3, and 7 d relative to parturition (DRP). Flow cytometry was used t

Externí odkaz: https://doaj.org/article/fd0a568dd4764ae3b093776f45f96076

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Akademický článek

Methods for detecting heat stress in hutch-housed dairy calves in a continental climate

Autor: B. Dado-Senn, V. Ouellet, V. Lantigua, J. Van Os, J. Laporta

Publikováno v: Journal of Dairy Science, Vol 106, Iss 2, Pp 1039-1050 (2023)

ABSTRACT: Dairy calves exposed to solar radiation, elevated ambient temperature, and humidity are at risk of impaired welfare and productivity. Initial detection of thermal discomfort requires determination of optimal heat stress indicators and thres

Externí odkaz: https://doaj.org/article/f8d411f02c6543338b3ab4df826cabee

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Akademický článek

Effect of in utero exposure to hyperthermia on postnatal hair length, skin morphology, and thermoregulatory responses

Autor: B.D. Davidson, K.M. Sarlo Davila, R.G. Mateescu, G.E. Dahl, J. Laporta

Publikováno v: Journal of Dairy Science, Vol 105, Iss 11, Pp 8898-8910 (2022)

ABSTRACT: Skin and hair coat play important functions in maintaining homeostasis and thermoregulation for cattle, which can affect all modes of heat loss. Our objective was to investigate the effect of hyperthermia experienced in utero during late ge

Externí odkaz: https://doaj.org/article/7d950d57dbda450da5bfcda34f1828d2

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Akademický článek

Effect of late-gestation heat stress in nulliparous heifers on postnatal growth, passive transfer of immunoglobulin G, and thermoregulation of their calves

Autor: B.D. Davidson, B. Dado-Senn, V. Ouellet, G.E. Dahl, J. Laporta

Publikováno v: JDS Communications, Vol 2, Iss 3, Pp 165-169 (2021)

Youngstock such as nulliparous pregnant dairy heifers are not typically considered for active cooling, as they are thought to be more heat tolerant than mature cows. Recently, the benefits of heat stress abatement in pregnant heifers were studied, bu

Externí odkaz: https://doaj.org/article/617a801bdc924dc78e7b6f2f23e75b25

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Akademický článek

Financial Impacts of Late-Gestation Heat Stress on Cow and Offspring Lifetime Performance

Autor: L. T. Casarotto, J. Laporta, G. E. Dahl

Publikováno v: EDIS, Vol 2021, Iss 6 (2021)

This publication describes the financial implications of ignoring heat stress in dry cows to assist dairy producers in decisions about installation of heat abatement measures and cooling cows in that stage of the production cycle. Written by L. T. Ca

Externí odkaz: https://doaj.org/article/5d69f4afe12b47fca8a9b2bd5f209a1c

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Akademický článek

Effects of herbage allowance of native grasslands in purebred and crossbred beef cows: metabolic, endocrine and hepatic gene expression profiles through the gestation–lactation cycle

Autor: J. Laporta, A.L. Astessiano, C. López-Mazz, P. Soca, A.C. Espasandin, M. Carriquiry

Publikováno v: Animal, Vol 8, Iss 7, Pp 1119-1129 (2014)

Our objective was to evaluate the metabolic, endocrine and hepatic mRNA profiles through the gestation–lactation cycle in purebred (PU: Angus and Hereford) and crossbred (CR: reciprocal F1 crosses) mutliparous beef cows (n=32), grazing on two herba

Externí odkaz: https://doaj.org/article/8a9383ef35964a4db9bf4603b3040a19

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