Late-gestation heat stress impairs daughter and granddaughter lifetime performance

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dc.citation.issue8
dc.citation.volume103
dc.contributor.authorLaporta J
dc.contributor.authorFerreira FC
dc.contributor.authorOuellet V
dc.contributor.authorDado-Senn B
dc.contributor.authorAlmeida AK
dc.contributor.authorDe Vries A
dc.contributor.authorDahl GE
dc.coverage.spatialUnited States
dc.date.accessioned2024-09-30T20:25:49Z
dc.date.available2024-09-30T20:25:49Z
dc.date.issued2020-08
dc.description.abstractRecords of late-gestation heat stress studies conducted over 10 consecutive years in Florida were pooled and analyzed to test the hypothesis that maternal hyperthermia during late gestation impairs performance of the offspring across multiple generations and lactations, ultimately impeding the profitability of the US dairy sector. Dry-pregnant multiparous dams were actively cooled (CL; shade of a freestall barn, fans and water soakers, n = 196) or not (HT; shade only, n = 198) during the last 46 d of gestation, concurrent with the entire dry period. After data mining, records of 156 daughters (F1) that were born either to CL (CLF1, n = 77) or HT dams (HTF1, n = 79) and 45 granddaughters (F2) that were born either to CLF1 (CLF2, n = 24) or HTF1 (HTF2, n = 21) were used in the analysis. Life events and daily milk yield for 3 lactations of daughters and granddaughters were obtained. Milk yield, reproductive performance, and productive life data were analyzed using MIXED and GLIMMIX procedures, and lifespan was analyzed using PHREG and LIFETEST procedures of SAS (SAS Institute Inc., Cary, NC). Milk production of HTF1 was reduced in their first (2.2 kg/d), second (2.3 kg/d), and third lactations (6.5 kg/d) compared with CLF1. More HTF1 were culled before first calving, and the productive life and lifespan of HTF1 were reduced relative to CLF1 (4.9 and 11.7 mo, respectively). The granddaughters (HTF2) born to HTF1 produced less milk in their first lactation (1.3 kg/d) relative to granddaughters (CLF2) born to CLF1. More HTF2 were culled before first breeding relative to CLF2; however, productive life and lifespan were not different between HTF2 and CLF2 animals. An economic analysis was then performed based on the number of heat stress days, dry cows per state, and the aforementioned impairments on daughters' lifespans and milk production. Collectively in the United States, the economic losses for additional heifer rearing cost, reduced productive life, and reduced milk yield of the F1 offspring were estimated at $134, $90, and $371 million per year, respectively. In summary, late-gestation heat stress exerts carryover effects on at least 2 generations. Providing heat abatement to dry-pregnant dams is important to rescue milk loss of the dam and to prevent losses in their progeny.
dc.description.confidentialfalse
dc.edition.editionAugust 2020
dc.format.pagination7555-7568
dc.identifier.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/32534930
dc.identifier.citationLaporta J, Ferreira FC, Ouellet V, Dado-Senn B, Almeida AK, De Vries A, Dahl GE. (2020). Late-gestation heat stress impairs daughter and granddaughter lifetime performance.. J Dairy Sci. 103. 8. (pp. 7555-7568).
dc.identifier.doi10.3168/jds.2020-18154
dc.identifier.eissn1525-3198
dc.identifier.elements-typejournal-article
dc.identifier.issn0022-0302
dc.identifier.piiS0022-0302(20)30448-3
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/71535
dc.languageeng
dc.publisherElsevier Inc on behalf of the American Dairy Science Association
dc.publisher.urihttps://www.sciencedirect.com/science/article/pii/S0022030220304483
dc.relation.isPartOfJ Dairy Sci
dc.rights(c) 2020 The Author/s
dc.rightsCC BY-NC-ND 4.0
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectdry cow
dc.subjectheat stress
dc.subjectin utero programming
dc.subjectAnimals
dc.subjectCattle
dc.subjectCattle Diseases
dc.subjectDairying
dc.subjectFemale
dc.subjectFlorida
dc.subjectHealth Status
dc.subjectHeat Stress Disorders
dc.subjectHeat-Shock Response
dc.subjectLactation
dc.subjectMilk
dc.subjectParturition
dc.subjectPregnancy
dc.subjectPregnancy Complications
dc.subjectPrenatal Exposure Delayed Effects
dc.subjectReproduction
dc.titleLate-gestation heat stress impairs daughter and granddaughter lifetime performance
dc.typeJournal article
pubs.elements-id479065
pubs.organisational-groupOther
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