Adrenal response to competitive singing: glucocorticoid metabolites in male Saltator similis (Aves, Thraupidae) DOI Creative Commons

Carolina Lorieri-Vanin,

Heriberto Barbosa-Moyano, Clarice Diniz Alvarenga

et al.

Conservation Physiology, Journal Year: 2025, Volume and Issue: 13(1)

Published: Jan. 1, 2025

Abstract Song competitions involving passerines, such as the Green-winged Saltator (Saltator similis), are legally permitted in Brazil and attract widespread participation. This study aimed to assess adrenal response male S. similis by comparing glucocorticoid metabolite (GCM) levels uro-faecal extract samples collected during three with those from a rest day (3 days before competition, D-3), competition (D-1), of (D0) after (D1). Simultaneously, we examined potential variation GCM among other males not engaged song but subjected ex situ conditions much like participating males. were measured using direct enzyme immunoassay (EIA, CJM006), which was physiologically (ACTH challenge) analytically validated (parallelism, accuracy precision tests) for species under study. The results indicated that average concentration lower group (33.43 ± 22.09 ng/g) compared control (70.09 29.45 ng/g; P = 0.01). However, concentrations spiked significantly on (D0: 38.29 26.12 (D-3: 28.64 17.86 0.02), suggesting acute stress response. Given elevated observed competitions, further research is necessary confirm welfare these birds explore long-term effects stressors.

Language: Английский

Adrenal response to competitive singing: glucocorticoid metabolites in male Saltator similis (Aves, Thraupidae) DOI Creative Commons

Carolina Lorieri-Vanin,

Heriberto Barbosa-Moyano, Clarice Diniz Alvarenga

et al.

Conservation Physiology, Journal Year: 2025, Volume and Issue: 13(1)

Published: Jan. 1, 2025

Abstract Song competitions involving passerines, such as the Green-winged Saltator (Saltator similis), are legally permitted in Brazil and attract widespread participation. This study aimed to assess adrenal response male S. similis by comparing glucocorticoid metabolite (GCM) levels uro-faecal extract samples collected during three with those from a rest day (3 days before competition, D-3), competition (D-1), of (D0) after (D1). Simultaneously, we examined potential variation GCM among other males not engaged song but subjected ex situ conditions much like participating males. were measured using direct enzyme immunoassay (EIA, CJM006), which was physiologically (ACTH challenge) analytically validated (parallelism, accuracy precision tests) for species under study. The results indicated that average concentration lower group (33.43 ± 22.09 ng/g) compared control (70.09 29.45 ng/g; P = 0.01). However, concentrations spiked significantly on (D0: 38.29 26.12 (D-3: 28.64 17.86 0.02), suggesting acute stress response. Given elevated observed competitions, further research is necessary confirm welfare these birds explore long-term effects stressors.

Language: Английский

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