Physiological validation of the use of faecal glucocorticoid metabolites as a measure of stress in a passerine and a columbid from southern Africa

Article Biology

Chronic stress and captivity alter the cloacal microbiome of a wild songbird

Anne A. Madden et al.

Summary: This study reveals the complex interactions between an organism's microbiome and its response to stressors, and identifies significant effects of stress and captivity on the house sparrow microbiome. Chronic stress and captivity lead to the loss of beneficial microbial taxa and an increase in endotoxin-producing bacteria. These findings highlight the importance of considering the microbiome when evaluating the impact of stress on individual and population health.

JOURNAL OF EXPERIMENTAL BIOLOGY (2022)

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Article Ornithology

Validation of a non-invasive technique for quantifying a stress-associated biomarker in a southern African hornbill

Michelle Bouwer et al.

Summary: The study demonstrates that droppings are a suitable matrix for monitoring stress-associated biomarkers in this species and suggests that the tetrahydrocorticosterone EIA may often be appropriate for wild birds.

JOURNAL OF ORNITHOLOGY (2021)

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Article Biology

Hot days are associated with short-term adrenocortical responses in a southern African arid-zone passerine bird

Lesedi L. Moagi et al.

Summary: The study found that when T-max exceeded 38 degrees Celsius, the level of faecal glucocorticoid metabolite in southern pied babblers increased linearly, indicating that very hot days are experienced as acute stressors. However, the effects of T-max on fGCM levels did not carry over to the following morning.

JOURNAL OF EXPERIMENTAL BIOLOGY (2021)

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Review Psychology, Biological