Comparing the responses of grain fed feedlot cattle under moderate heat load and during subsequent recovery with those of feed restricted thermoneutral counterparts: plasma biochemistry

Wijffels, Gene; Sullivan, Mitchell J.; Stockwell, Sally; Briscoe, S; Li, Y; McCulloch, Russell; Olm, J. C. W.; Cawdell-Smith, Judy; Gaughan, J. B.

doi:10.1007/s00484-022-02349-4

Cited by 3 publications

(11 citation statements)

References 87 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the earlier report on the metabolic responses of these same animals revealed that during Challenge the two treatment groups were differentiated by various energy metabolites, namely plasma concentrations of glutamine, triglycerides (TG) and cholesterol. These were all increased in the FRTN group (Wijffels et al 2022). On the other hand, NEFA and glucose concentrations were not altered in either group during Challenge.…”

Section: Challengementioning

confidence: 85%

“…During the 4 days of PreChallenge, the TC group experienced mean air temperature and %RH of 22.7 °C and 64%, giving a mean THI of 70. A highly detailed methodology depicting the animal treatments whilst in the CCR is given by Sullivan et al (2022), and a summarised version with information of the treatment during outdoor feedlot finishing is presented in Wijffels et al (2022).…”

Section: Animal Experimentsmentioning

confidence: 99%

“…Days of blood sampling are indicated also. Cohort 1 did not proceed through all periods, and the data from these animals was not included in the analyses for this paper (Courtesy of Wijffels et al 2022) animals which can cause anxiety, stress and impairment of rumen function (Schwartzkopf-Genswein et al 2003).…”

Section: Animal Experimentsmentioning

confidence: 99%

“…Seven hormone concentration variables were analysed: adiponectin, log 2 (insulin), log 2 (insulin):glucose, leptin, log 2 (prolactin), T4 and log 10 (TSH). The statistical analyses methodology followed the same method as described by Wijffels et al (2022), i.e. applying the PROC Mixed model with the REML estimation method within the SAS Program (version 9.4, SAS Institute Inc., Cary, NC;2002.…”

Section: Statistical Analysis Of Plasma Hormone Concentrations and Li...mentioning

confidence: 99%

“…A detailed description of performance and the physiological responses of grain fed Black Angus steers to moderate heat load compared to FRTN animals during the three periods in the CCR is presented in Sullivan et al (2022). A description of the metabolic responses across all periods, as interpreted from clinical biochemistry markers, is available also (Wijffels et al 2022). In this report we followed the trajectories of a suite of plasma hormones in these same animals through challenge, recovery and final feedlot finishing.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Comparing the responses of grain fed feedlot cattle under moderate heat load and during subsequent recovery with those of feed restricted thermoneutral counterparts: metabolic hormones

et al. 2023

Self Cite

View full text Add to dashboard Cite

We set out to determine the impact of moderate heat load on the plasma concentrations of a suite of hormones involved in regulating energy metabolism and feed intake. The responses of the thermally challenged (TC) feedlot steers were compared to those of feed restricted thermoneutral (FRTN) steers. Two sequential cohorts of twelve 518 ± 23 kg Black Angus steers on finisher grain ration were housed in climate-controlled rooms (CCR) for 18 days and returned to outdoor pens for 40 days. The TC group was subjected to a diurnal range of 28–35 °C for 7 days (Challenge) but held in thermoneutral conditions beforehand (PreChallenge), and in Recovery (after Challenge). The FRTN group was held in thermoneutral conditions and feed restricted throughout. Blood was collected over the three periods in CCR and two periods in outdoor pens for 40 days (PENS and Late PENS). Plasma concentrations of prolactin, thyroid stimulating hormone, insulin, leptin, adiponectin and thyroxine (T4) were determined during the five periods. Whilst the pituitary hormones were relatively stable, there were differences in plasma leptin, adiponectin and T4 between the two groups during Challenge and Recovery, and occasionally in PENS. The interaction of the plasma hormone concentrations and rumen temperature and DMI were also investigated. Whilst the positive relationship between DMI and leptin was confirmed, we found a strong negative relationship between adiponectin and rumen temperature, and a strong positive relationship between adiponectin and dry matter intake (DMI) in the TC steers only.

show abstract

Section: Challengementioning

confidence: 85%

Section: Animal Experimentsmentioning

confidence: 99%

Section: Animal Experimentsmentioning

confidence: 99%

Section: Statistical Analysis Of Plasma Hormone Concentrations and Li...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Comparing the responses of grain fed feedlot cattle under moderate heat load and during subsequent recovery with those of feed restricted thermoneutral counterparts: metabolic hormones

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

Comparing the responses of grain-fed feedlot cattle under moderate heat load and during subsequent recovery with those of feed-restricted thermoneutral counterparts: blood cells and inflammatory markers

Wijffels,

Sullivan,

Stockwell

et al. 2023

Int J Biometeorol

Self Cite

View full text Add to dashboard Cite

Given the climate projections for livestock rearing regions globally, understanding the inflammatory status of livestock under various heat loads will be informative to animal welfare and management. A survey of plasma inflammatory markers was conducted, and blood leucocyte counts followed to investigate the capacity of the ~ 500 kg grain fed Black Angus steer to respond to and recover from a moderate heat load challenge. Two sequential cohorts of 12 steers were housed in climate-controlled rooms (CCR) for 18 days. A thermally challenged (TC) group (n = 2 × 6) experienced five consecutive periods: PreChallenge, Challenge, and Recovery within the CCR, and 40 days in outdoor pens (PENS and Late PENS). PreChallenge (5 days) and Recovery (7 days) delivered thermoneutral conditions, whereas in Challenge the TC steers experienced a diurnal temperature range of 28–35 °C. A feed-restricted thermoneutral (FRTN) treatment (n = 2 × 6) was run concurrently to differentiate between responses to reduced feed intake alone and moderate heat stress. Blood neutrophil counts were particularly sensitive to moderate heat load with higher numbers during Challlenge and in PENs. The plasma concentrations of TNFα and IL-1β were depressed in the TC group compared to the FRTN counterparts and remained so for 40 days after Challenge. Linear relationships of the concentrations of IL-1β, IL-10, and haptoglobin with rumen temperature or dry matter intake detected in the FRTN group were altered or absent in the TC group. The findings suggest significant impacts of moderate heat load on the inflammatory status of feedlot cattle.

show abstract

The physiology of heat stress in beef cattle

Lees

Gaughan

2023

Animal - science proceedings

View full text Add to dashboard Cite

Comparing the responses of grain fed feedlot cattle under moderate heat load and during subsequent recovery with those of feed restricted thermoneutral counterparts: plasma biochemistry

Cited by 3 publications

References 87 publications

Comparing the responses of grain fed feedlot cattle under moderate heat load and during subsequent recovery with those of feed restricted thermoneutral counterparts: metabolic hormones

Comparing the responses of grain fed feedlot cattle under moderate heat load and during subsequent recovery with those of feed restricted thermoneutral counterparts: metabolic hormones

Comparing the responses of grain-fed feedlot cattle under moderate heat load and during subsequent recovery with those of feed-restricted thermoneutral counterparts: blood cells and inflammatory markers

The physiology of heat stress in beef cattle

Contact Info

Product

Resources

About