Research Note: Sex difference in changes in heterophil to lymphocyte ratios in response to acute exposure of both corticosterone and cortisol in the Pekin duck

Tetel, V.; Tonissen, S.; Fraley, Gregory S.

doi:10.1016/j.psj.2022.101914

Cited by 4 publications

(3 citation statements)

References 10 publications

(15 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the stress measures, it was hypothesized that visible F (30 and 90 Hz) would increase the H/L ratio and CORT. Heterophil-to-lymphocyte ratios have generally been used to evaluate chronic stress ( Hofmann et al, 2021 ; Lee et al, 2022 ), but recently others have suggested it may reflect acute stressors ( Tetel et al, 2022 ). Regardless, the H/L ratio was unaffected by F; however, LB pullets had a higher H/L ratio than LW pullets at both ages tested.…”

Section: Discussionmentioning

confidence: 99%

How does visible light flicker impact laying hen pullet behavior, fear, and stress levels?

McPhee,

Shynkaruk,

Buchynski

et al. 2024

Poultry Science

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

How does visible light flicker impact laying hen pullet behavior, fear, and stress levels?

McPhee,

Shynkaruk,

Buchynski

et al. 2024

Poultry Science

View full text Add to dashboard Cite

“…In addition, cortisol and corticosterone concentrations might not correlate (76). Especially studies investigating the immune system as index of welfare should consider measuring several GC metabolites when trying to elucidate mechanisms [e.g., (77)].…”

Section: Glucocorticoid Samplingmentioning

confidence: 99%

Glucocorticoids in relation to behavior, morphology, and physiology as proxy indicators for the assessment of animal welfare. A systematic mapping review

Tiemann

Fijn²,

Bagaria³

et al. 2023

Front. Vet. Sci.

View full text Add to dashboard Cite

Translating theoretical concepts of animal welfare into quantitative assessment protocols is an ongoing challenge. Glucocorticoids (GCs) are frequently used as physiological measure in welfare assessment. The interpretation of levels of GCs and especially their relation to welfare, however, is not as straightforward, questioning the informative power of GCs. The aim of this systematic mapping review was therefore to provide an overview of the relevant literature to identify global patterns in studies using GCs as proxy for the assessment of welfare of vertebrate species. Following a systematic protocol and a-priory inclusion criteria, 509 studies with 517 experiments were selected for data extraction. The outcome of the experiments was categorized based on whether the intervention significantly affected levels of GCs, and whether these effects were accompanied by changes in behavior, morphology and physiology. Additional information, such as animal species, type of intervention, experimental set up and sample type used for GC determination was extracted, as well. Given the broad scope and large variation in included experiments, meta-analyses were not performed, but outcomes are presented to encourage further, in-depth analyses of the data set. The interventions did not consistently lead to changes in GCs with respect to the original authors hypothesis. Changes in GCs were not consistently paralleled by changes in additional assessment parameter on behavior, morphology and physiology. The minority of experiment quantified GCs in less invasive sample matrices compared to blood. Interventions showed a large variability, and species such as fish were underrepresented, especially in the assessment of behavior. The inconclusive effects on GCs and additional assessment parameter urges for further validation of techniques and welfare proxies. Several conceptual and technical challenges need to be met to create standardized and robust welfare assessment protocols and to determine the role of GCs herein.

show abstract

“…Changes in fearfulness can be noted through fear tests such as a novel object test ( Forkman et al, 2007 ). Alterations to circulating white blood cells can be indicative of stress and can be evaluated through changes to the heterophil-to-lymphocyte ( H/L ) ratio ( Gross and Siegel, 1983 ; Weimer et al, 2020 ; Hofman et al, 2021 ; Nasar et al, 2021 ; Tetel et al, 2022 ; Lee et al, 2022 ). Differences in these parameters may be indicative of the affective state of birds and their stress level.…”

Section: Introductionmentioning

confidence: 99%

Do flickering lights impact turkey hen behavior, stress, and fear?

Hammond,

Buchynski,

Shynkaruk

et al. 2024

Poultry Science

View full text Add to dashboard Cite

Research Note: Sex difference in changes in heterophil to lymphocyte ratios in response to acute exposure of both corticosterone and cortisol in the Pekin duck

Cited by 4 publications

References 10 publications

How does visible light flicker impact laying hen pullet behavior, fear, and stress levels?

How does visible light flicker impact laying hen pullet behavior, fear, and stress levels?

Glucocorticoids in relation to behavior, morphology, and physiology as proxy indicators for the assessment of animal welfare. A systematic mapping review

Do flickering lights impact turkey hen behavior, stress, and fear?

Contact Info

Product

Resources

About