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Tytuł pozycji:

Evaluation and mitigation of the effects of in utero heat stress on piglet growth performance, postabsorptive metabolism, and stress response following weaning and transport.

Tytuł:
Evaluation and mitigation of the effects of in utero heat stress on piglet growth performance, postabsorptive metabolism, and stress response following weaning and transport.
Autorzy:
Maskal JM; Department of Animal Sciences, Purdue University, West Lafayette, IN.
Duttlinger AW; Department of Animal Sciences, Purdue University, West Lafayette, IN.
Kpodo KR; Department of Animal Sciences, Purdue University, West Lafayette, IN.
McConn BR; Oak Ridge Institute for Science and Education, Oak Ridge, TN.
Byrd CJ; Department of Animal Sciences, Purdue University, West Lafayette, IN.
Richert BT; Department of Animal Sciences, Purdue University, West Lafayette, IN.
Marchant-Forde JN; Livestock Behavior Research Unit, USDA-ARS, West Lafayette, IN.
Lay DC; Livestock Behavior Research Unit, USDA-ARS, West Lafayette, IN.
Perry SD; Division of Animal Sciences, University of Missouri, Columbia, MO.
Lucy MC; Division of Animal Sciences, University of Missouri, Columbia, MO.
Safranski TJ; Division of Animal Sciences, University of Missouri, Columbia, MO.
Johnson JS; Livestock Behavior Research Unit, USDA-ARS, West Lafayette, IN.
Źródło:
Journal of animal science [J Anim Sci] 2020 Sep 01; Vol. 98 (9).
Typ publikacji:
Journal Article
Język:
English
Imprint Name(s):
Original Publication: Champaign, IL : American Society of Animal Science
MeSH Terms:
Energy Intake*
Heat-Shock Response*
Swine*
Weaning*
Animal Feed/analysis ; Animals ; Body Weight ; Diet ; Female ; Heat Stress Disorders/veterinary ; Pregnancy ; Swine Diseases
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Contributed Indexing:
Keywords: in utero heat stress; mitigation; pigs; transport; weaning
Entry Date(s):
Date Created: 20200825 Date Completed: 20201201 Latest Revision: 20210825
Update Code:
20240105
PubMed Central ID:
PMC7511060
DOI:
10.1093/jas/skaa265
PMID:
32835367
Czasopismo naukowe
In utero heat stress (IUHS) increases the energy requirements of pigs during postnatal life, and this may compound weaning and transport stress. The study objective was to evaluate and mitigate the negative effects of IUHS following weaning and transport through the provision of a nutrient-dense (ND) nursery diet formulated to meet the greater energy requirements of IUHS pigs during the first 14 d postweaning and transport. Twenty-four pregnant gilts were exposed to thermoneutral (TN; n = 12; 17.5 ± 2.1 °C) or heat stress (HS; n = 12; cycling 26 to 36 °C) conditions for the first half of gestation (day 6 to 59) and then TN conditions (20.9 ± 2.3 °C) until farrowing. Nine TN gilts and 12 HS gilts produced litters. At weaning (16.2 ± 0.4 d), mixed-sex piglets (N = 160; 4.78 ± 0.15 kg body weight [BW]) were transported (loading + transport + unloading) for 11 h 40 min. Following transport, piglets were blocked into pens (n = 4 pigs/pen) by in utero and dietary treatments: in utero thermoneutral (IUTN) + control (C) diet (n = 10 pens), IUTN + ND (n = 10 pens), IUHS + C (n = 10 pens), and IUHS + ND (n = 10 pens). Treatment diets were fed from day 1 to 14 postweaning and transport (period 1), and the C diet was fed to all pigs from day 14 to 35 postweaning and transport (period 2). Production measures were taken in 7 d intervals to calculate average daily gain (ADG), average daily feed intake (ADFI), average daily net energy intake (ADEI), gain:feed, and gain:net energy intake. Blood samples were collected prior to transport, following transport, and on days 2, 7, 14, 28, and 35 postweaning and transport to analyze cortisol, glucose, insulin, and nonesterified fatty acids. Behavior was assessed through video-recording on days 3, 5, 8, 11, and 13 postweaning and transport. In period 1, ADG was reduced (P = 0.04; 20.0 g/d) in IUHS vs. IUTN pigs. Pigs fed ND diets had reduced ADFI (P = 0.02; 9.3%) compared with C diet-fed pigs during period 1, which resulted in similar ADEI (P = 0.23; 1,115 ± 35 kcal/d). During transport, cortisol was decreased (P = 0.03; 25.8%) in IUHS vs. IUTN pigs. On day 2, glucose was decreased (P = 0.01; 13.8%) in IUHS vs. IUTN pigs. No in utero treatment-related behavior differences were observed but lying was reduced (P = 0.03; 6.5%) and standing was increased (P = 0.04; 14.1%) in ND vs. C pigs overall. In summary, IUHS reduced growth performance in pigs following weaning and transport, and providing an ND diet did not rescue the lost performance.
(Published by Oxford University Press on behalf of the American Society of Animal Science 2020.)

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