Search Results - "Owen‐Ashley, Noah T."

Androgens and the Immunocompetence Handicap Hypothesis: Unraveling Direct and Indirect Pathways of Immunosuppression in Song Sparrows by Owen‐Ashley, Noah T., Hasselquist, Dennis, Wingfield, John C.

“…The immunocompetence handicap hypothesis proposes that testosterone (T)‐dependent sexual signals are honest indicators of male health or genetic quality…”
Get full text

Modulation of the hypothalamic–pituitary–adrenal axis of an Arctic–breeding polygynandrous songbird, the Smith's longspur, Calcarius pictus by Meddle, Simone L., Owen-Ashley, Noah T., Richardson, Matthew I., Wingfield, John C.

“…To successfully reproduce in the Arctic, birds must modulate their neuroendocrine and behavioural systems. These adjustments include an attenuation of the…”
Get full text

Androgens, interspecific competition and species replacement in hybridizing warblers by Owen-Ashley, Noah T., Butler, Luke K.

“…) have replaced hermit warblers (…”
Get full text

Hormonal, behavioral, and thermoregulatory responses to bacterial lipopolysaccharide in captive and free-living white-crowned sparrows ( Zonotrichia leucophrys gambelii) by Owen-Ashley, Noah T., Turner, Michael, Hahn, Thomas P., Wingfield, John C.

“…Exposing vertebrates to pathogenic organisms or inflammatory stimuli, such as bacterial lipopolysaccharide (LPS), activates the immune system and triggers the…”
Get full text

Latitudinal variation of immune defense and sickness behavior in the white-crowned sparrow ( Zonotrichia leucophrys ) by Owen-Ashley, Noah T, Hasselquist, Dennis, Råberg, Lars, Wingfield, John C

“…Abstract There is a general trend that parasitism risk declines as latitude increases. Host populations breeding at high latitudes should therefore invest less…”
Get full text

Seasonal modulation of sickness behavior in free-living northwestern song sparrows (Melospiza melodia morphna) by Owen-Ashley, Noah T, Wingfield, John C

“…A variety of vertebrate species modulate immune function on a seasonal basis to cope with seasonal energy deficits and competing life-history demands, such as…”
Get full text

CONTEXT-SPECIFIC RESPONSE OF FLORIDA SCRUB-JAY PAIRS TO NORTHERN MOCKINGBIRD VOCAL MIMICRY by Owen-Ashley, Noah T, Schoech, Stephan J, Mumme, Ronald L

“…It is well established that vocal mimicry serves an intraspecific function in birds by increasing repertoire size. On an interspecific level, territorial…”
Get full text

Acute phase responses of passerine birds: characterization and seasonal variation by Owen-Ashley, Noah T., Wingfield, John C.

Get full text

Context-Specific Response of Florida Scrub-Jay Pairs to Northern Mockingbird Vocal Mimicry by Owen-Ashley, Noah T., Schoech, Stephan J., Mumme, Ronald L.

“…It is well established that vocal mimicry serves an intraspecific function in birds by increasing repertoire size. On an interspecific level, territorial…”
Get full text

Micropteropus pusillus by Owen-Ashley, Noah T., Wilson, Don E.

Get full text