Regulation of plasma testosterone, corticosterone, and metabolites in response to stress, reproductive stage, and social challenges in a desert male songbird

Deviche, Pierre; Béouche-Hélias, Benjamin; Davies, Scott; Gao, Sisi; Lane, Samuel J.; Valle, Shelley

doi:10.1016/j.ygcen.2014.01.010

Cited by 76 publications

(81 citation statements)

References 78 publications

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“…Recent work on Rufous-winged Sparrows (Peucaea carpalis), a sedentary sparrow that breeds in arid habitat, reported reduced plasma T following stressors during pre-breeding and breeding (Deviche et al, 2014(Deviche et al, , 2016. However, plasma CORT and T were not found to be correlated at the individual level in Rufous-winged Sparrows, and there was no evidence for a functional relationship between elevated CORT and T levels.…”

Section: Discussionmentioning

confidence: 93%

Mechanisms Associated with an Advance in the Timing of Seasonal Reproduction in an Urban Songbird

et al. 2017

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The colonization of urban environments by animals is often accompanied by earlier breeding and associated changes in seasonal schedules. Accelerated timing of seasonal reproduction in derived urban populations is a potential cause of evolutionary divergence from ancestral populations if differences in physiological processes that regulate reproductive timing become fixed over time. We compared reproductive development in free-living and captive male dark-eyed juncos deriving from a population that recently colonized a city (∼35 years) and ceased migrating to that of conspecifics that live in sympatry with the urban population during winter and spring but migrate elsewhere to breed. We predicted that the earlier breeding sedentary urban birds would exhibit accelerated reproductive development in the spring along the hypothalamic-pituitary-gonadal (HPG) axis as compared to migrants. We found that free-living sedentary urban and migrant juncos differed at the level of the pituitary when measured as baseline luteinizing hormone (LH) levels, but not in increased LH when challenged with Gonadotropin-Releasing Hormone (GnRH). Among captives held in a common garden, and at the level of the gonad, we found that sedentary urban birds produced more testosterone in response to GnRH than migrants living in the same common environment, suggesting greater gonadal sensitivity in the derived urban population. Greater gonadal sensitivity could arise from greater upstream activation by LH or FSH or from reduced suppression of gonadal development by the adrenal axis. We compared abundance of gonadal transcripts for LH receptor (LHR), follicle stimulating hormone receptor (FSHR), glucocorticoid receptor (GR), and mineralocorticoid receptor (MR) in the common-garden, predicting either more abundant transcripts for LHR and FSHR or fewer transcripts for GR and MR in the earlier breeding sedentary urban breeders, as compared to the migrants. We found no difference in the expression of these genes. Together these data suggest that advanced timing of reproduction in a recently derived urban population is facilitated by earlier increase in upstream baseline activity of the HPG and earlier release from gonadal suppression Fudickar et al. Timing of Reproduction following Urbanizationby yet-to-be-discovered mechanisms. Evolutionarily, our results suggest that potential for gene flow between seasonally sympatric populations may be limited due to urban-induced advances in the timing of reproduction and resulting allochrony with ancestral forms.

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Section: Discussionmentioning

confidence: 93%

Mechanisms Associated with an Advance in the Timing of Seasonal Reproduction in an Urban Songbird

et al. 2017

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“…Additionally, R. icterica the species with higher T levels, showed a higher decrease on T. This same pattern of variation was found when comparing individuals in birds (Deviche et al, 2012;Deviche et al, 2014). The authors suggested that stressed birds defend against decreasing T below a minimum level that is needed for maintenance of T-dependent behavioral and morphological sexual characteristics, and/or physiological functions, particularly the negative feedback on gonadotropin secretion (Deviche et al, 2014). In our study and both studies with birds (Deviche et al, 2012;Deviche et al, 2014), the reduction on T was not correlated to increase on CORT, suggesting that the reduction on T was not simply a function of increased CORT secretion (Deviche et al, 2012).…”

Section: Intraspecific Effectssupporting

confidence: 75%

Section: Intraspecific Effectsmentioning

confidence: 59%

“…Studies in a diversity of vertebrate species have shown that stressors typically suppress T, sometimes quite rapidly (Greenberg and Wingfield, 1987;Deviche et al, 2010, Deviche et al, 2012Deviche et al, 2014). Reduction on T levels has also been reported after induced acute stress in reptiles (reviewed in Tokarz and Summers, 2011), including the responses to confinement (Jones and Bell, 2004) and handling stress (Moore et al, 1991), and after a restraint challenge and toe-clipping in toads (Narayan et al, 2011b;Narayan et al, 2012).…”

Section: Intraspecific Effectsmentioning

confidence: 99%

“…Additionally, house sparrows implanted with testosterone and held in short days showed no suppression of cell-mediated immune activity, indicating that testosterone is not obligatorily immunosuppressive year-round in this species . Furthermore, studies in a diversity of vertebrate species have shown that stressors typically suppress testosterone levels (T), sometimes quite rapidly (Greenberg and Wingfield, 1987;Deviche et al, 2010, Deviche et al, 2012Deviche et al, 2014). Reduction on T levels has been reported after induced acute stress in reptiles (reviewed in Tokarz and Summers, 2011), and after a restraint challenge and toe-clipping in toads (Narayan et al, 2011b;Narayan et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Níveis plasmáticos de corticosterona, testosterona e imunocompetência em Bufonídeos

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Behavioral and physiological responses to instability in group membership in wild male woolly monkeys (Lagothrix lagotricha poeppigii)

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Fiore

et al. 2021

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In group-living species, integrating into a new social group after dispersal is an important life history milestone associated with physical and social challenges. Generally, this process seems to be accompanied by heightened glucocorticoid (GC) concentrations; however, most studies of physiological responses to group transfer have been conducted on species with despotic social relationships, where in-How to cite this article: Pain EL, Koenig A, Di Fiore A, Lu A. Behavioral and physiological responses to instability in group membership in wild male woolly monkeys (Lagothrix lagotricha poeppigii).

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Regulation of plasma testosterone, corticosterone, and metabolites in response to stress, reproductive stage, and social challenges in a desert male songbird

Cited by 76 publications

References 78 publications

Mechanisms Associated with an Advance in the Timing of Seasonal Reproduction in an Urban Songbird

Mechanisms Associated with an Advance in the Timing of Seasonal Reproduction in an Urban Songbird

Níveis plasmáticos de corticosterona, testosterona e imunocompetência em Bufonídeos

Behavioral and physiological responses to instability in group membership in wild male woolly monkeys (Lagothrix lagotricha poeppigii)

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