Sight of a Predator Can Stimulate a Corticosterone Response in the Great Tit (Parus major)

Cockrem, John F.; Silverin, Bengt

doi:10.1006/gcen.2001.7749

Cited by 172 publications

(128 citation statements)

References 14 publications

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“…A common approach to studying this process is to observe (Clinchy et aI., 2004), introduce (Cockrem and Silverin, 2002), or remove (Ahola et aI., 2006) a potential threat to an animal. and measure subsequent changes in physiology, behavior, or survival.…”

Section: Introductionmentioning

confidence: 99%

“…Fowler, 1999;Walker et aI., 2006), or because they were nesting in boxes with a single small entrance hole (European starlings, Cyr and Romero, 2007), Additionally, in adult pied flycatchers (Ficedula hypoleuca) nesting in boxes, parental CORT increased in response to a decoy of a predator of adults and offspring (weasel, Mustela vulgaris), but not in response to a predator of offspring only (woodpecker, Dendrocopus major; Silverin, 1998), Thus. to understand the parental response to offspring-directed threats, those threats must be distinct from self-directed threats, either because parents are free to modulate their level of risk (e,g., free-living great tits, Parus major, exposed to a predator, Cockrem and Silverin, 2002), or because the threat is offspringspecific (e.g., the offspring-only predator used by Silverin, 1998).…”

Section: Introductionmentioning

confidence: 99%

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Adrenocortical responses to offspring-directed threats in two open-nesting birds

Butler¹,

Bisson²,

Hayden³

et al. 2009

General and Comparative Endocrinology

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Keywords:Chronic stress Corticosterone Parental care Nest predation Stress response Dependent young are often easy targets for predators, so for many parent vertebrates, responding to offspring-directed threats is a fundamental part of reproduction. We tested the parental adrenocortical response of the endangered black-capped vireo (Vireo atricapilla) and the common white-eyed vireo ( Vireo griseus) to acute and chronic threats to their offspring. Like many open-nesting birds, our study species experience high offspring mortality. Parents responded behaviorally to a predator decoy or human 1-2 m from their nests, but, in contrast to similar studies of cavity-nesting birds, neither these acute threats nor chronic offspring-directed threats altered plasma corticosterone concentrations of parents, Although parents in this study showed no corticosterone response to offspring-directed threats, they always increased corticosterone concentrations in response to capture. To explain these results, we propose that parents perceive their risk of nest-associated death differently depending on nest type, with cavIty-nesting adults perceiving greater risk to themselves than open-nesters that can readily detect and escape from offspring-directed threats, Our results agree with previous studies suggesting that the hypothalamic-pituitary-adrenal axis, a major physiological mechanism for coping with threats to survival, probably plays no role in coping with threats to offspring when risks to parents and offspring are not correlated. We extend that paradigm by demonstrating that nest style may influence how adults perceive the correlation between offspring-directed and self-directed threats.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adrenocortical responses to offspring-directed threats in two open-nesting birds

Butler¹,

Bisson²,

Hayden³

et al. 2009

General and Comparative Endocrinology

View full text Add to dashboard Cite

show abstract

“…A few studies suggested that exposure to predation, which raises circulating corticosterone (CORT) levels in great tit females, e.g. [4], may elevate CORT level in the egg, in turn having an effect on the offspring [25]. However, recently the reliability of egg yolk CORT measurements has been doubted [21].…”

Section: Introductionmentioning

confidence: 99%

“…[26] or drop e.g. [6], due to the presence of predators in the environment, with the bird's perceived danger probably determining the response [4,6,27].…”

Section: Introductionmentioning

confidence: 99%

Maternal steroids in egg yolk as a pathway to translate predation risk to offspring: Experiments with great tits

Coslovsky

Groothuis

Vries

et al. 2012

General and Comparative Endocrinology

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“…Overcrowding, food deprivation, weather extremes, exposure to predators, exertion, capture, restraint, and blood sampling are known stressors for birds (Harvey and Hall, 1990;Le Maho et al, 1992;Siegel, 1995;Silverin, 1998;Cockrem and Silverin, 2002). Capture methods that result in different intervals prior to blood sampling limit the use of serum corticosterone as a marker of stress in wild birds.…”

Section: Introductionmentioning

confidence: 99%

Levels of Fecal Corticosterone in Sandhill Cranes During a Human-Led Migration

Hartup

Olsen

Czekala

et al. 2004

Journal of Wildlife Diseases

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Fourteen captive-reared greater sandhill cranes (Grus canadensis tabida) were conditioned to follow ultralight aircraft to promote migration between Wisconsin and Florida (USA) after release. Fecal samples were collected throughout the training period in Wisconsin and during a 1,977-km human-led migration to Florida to determine fecal corticosterone (FC) concentrations by radioimmunoassay. The mean (ϮSE) FC concentration during the training period was 109.5Ϯ7.5 ng/g and was representative of baseline levels recorded previously from sandhill cranes. Fecal corticosterone concentrations increased in early migration compared to concentrations 1 mo prior to departure (PϽ0.01) but were not different from baseline concentrations at the end of the 6-wk migration period. The variability of FC concentrations in individual samples was greater throughout the migration than the training period. Increases in FC during migration were modest and generally consistent with normal corticosterone elevations observed in migrating birds.

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Sight of a Predator Can Stimulate a Corticosterone Response in the Great Tit (Parus major)

Cited by 172 publications

References 14 publications

Adrenocortical responses to offspring-directed threats in two open-nesting birds

Adrenocortical responses to offspring-directed threats in two open-nesting birds

Maternal steroids in egg yolk as a pathway to translate predation risk to offspring: Experiments with great tits

Levels of Fecal Corticosterone in Sandhill Cranes During a Human-Led Migration

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