Search Results - "Joseph M. Casto"

Characterizing the timing of yolk testosterone metabolism and the effects of etiocholanolone on development in avian eggs by Campbell, Nicole A, Angles, Rachel, Bowden, Rachel M, Casto, Joseph M, Paitz, Ryan T

“…Maternal transfer of steroids to eggs can elicit permanent effects on offspring phenotype. Although testosterone was thought to be a key mediator of maternal…”
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Embryonic modulation of maternal steroids in European starlings (Sturnus vulgaris) by Paitz, Ryan T., Bowden, Rachel M., Casto, Joseph M.

“…In birds, maternally derived yolk steroids are a proposed mechanism by which females can adjust individual offspring phenotype to prevailing conditions…”
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Female ornamentation and male mate choice in dark-eyed juncos by Wolf, Wendy L, Casto, Joseph M, Nolan, Val, Ketterson, Ellen D

“…Traits that enhance attractiveness in one sex may or may not influence attractiveness in the other. In the dark-eyed junco, Junco hyemalis, outer tail feathers…”
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Relative abundance of males to females affects behaviour, condition and immune function in a captive population of dark-eyed juncos Junco hyemalis by Greives, Timothy J, Casto, Joseph M, Ketterson, Ellen D

“…Relative numbers of males and females in breeding groups may vary from expected values owing to a variety of factors. To determine how sex ratio might…”
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The decline in yolk progesterone concentrations during incubation is dependent on embryonic development in the European starling by Paitz, Ryan T, Casto, Joseph M

“…Highlights ► We examined the metabolism of exogenous progesterone in European starling eggs. ► We also describe a focal freezing technique that terminates…”
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Real-time monitoring of electrically evoked catecholamine signals in the songbird striatum using in vivo fast-scan cyclic voltammetry by Smith, Amanda R., Garris, Paul A., Casto, Joseph M.

“…•Starlings express reduced DARPP-32 in Area X as compared to the surrounding MSt.•Stereotaxic coordinates for striatal subregions and VTA were located in a…”
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Daily Temperature Cycle Induces Daily Hatching Rhythm in Eastern Lubber Grasshoppers, Romalea microptera by Smith, Amanda R, Nowak, Ashley, Wagner, Patrick, Yates, Rebekah, Janci, Elise, Bernales, Ryan, Dietz, Taelor, Earhart, Alex, Fogle, Ariel, Fullerton, Nigel, Gromer, Kyle, Kliver, Brien, Larson, Will, Ludwikowski, Jessica, Martini, Tony, Mcgrath, Joe, Polino, Alex, Schumacher, Molly, Weick, Shannon, Casto, Joseph M, Whitman, Doug W

“…In nature, Eastern Lubber Grasshoppers, Romalea microptera, tend to hatch in the morning, thus exhibiting a daily hatching rhythm. They also show high…”
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Elevated testosterone reduces choosiness in female dark–eyed juncos (Junco hyemalis): evidence for a hormonal constraint on sexual selection? by Joel W. McGlothlin, Diane L. H. Neudorf, Joseph M. Casto, Val Nolan, Jr, Ellen D. Ketterson

“…), we tested whether experimentally enhancing female T would lead to a decrease in discrimination between two classes of males, one treated with T (T–males)…”
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Blood-feeding ectoparasites as developmental stressors: Does corticosterone mediate effects of mite infestation on nestling growth, immunity and energy availability? by Pryor, Leah J. Eisner, Casto, Joseph M.

“…ABSTRACT How resources are distributed to growth and self‐maintenance early in life is likely to impact survival and reproduction. Early resource allocation…”
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Seasonal and individual variation in response to GnRH challenge in male dark-eyed juncos ( Junco hyemalis) by Jawor, Jodie M., McGlothlin, Joel W., Casto, Joseph M., Greives, Timothy J., Snajdr, Eric A., Bentley, George E., Ketterson, Ellen D.

“…Concentrations of gonadal steroids such as testosterone (T) often vary widely in natural populations, but the causes and particularly the consistency of this…”
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Behavioral and physiological responses to experimentally elevated testosterone in female dark-eyed juncos (Junco hyemalis carolinensis) by Zysling, Devin A., Greives, Timothy J., Breuner, Creagh W., Casto, Joseph M., Demas, Gregory E., Ketterson, Ellen D.

“…Testosterone mediates the expression of many fitness-related traits in male vertebrates and is thought to account for numerous sex differences in trait…”
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Ectoparasites as developmental stressors: Effects on somatic and physiological development by Pryor, Leah J. E., Casto, Joseph M.

“…Developmental stress can alter resource allocation in early life, and in altricial birds with rapid developmental trajectories and high resource demands,…”
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Testosterone response to GnRH in a female songbird varies with stage of reproduction: implications for adult behaviour and maternal effects by JAWOR, JODIE M, MCGLOTHLIN, JOEL W, CASTO, JOSEPH M, GREIVES, TIMOTHY J, SNAJDR, ERIC A, BENTLEY, GEORGE E, KETTERSON, ELLEN D

“…1. Despite considerable recent interest in plasma and yolk testosterone (T) in female birds, relatively little is known about environmental regulation of…”
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Steroid Hormones and Immune Function: Experimental Studies in Wild and Captive Dark‐Eyed Juncos (Junco hyemalis) by Casto, Joseph M., Nolan, Jr, Val, Ketterson, Ellen D.

“…Monogamous and polygynous male songbirds generally differ in their breeding season profiles of circulating testosterone. Testosterone level spikes early in the…”
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Consequences of elevating plasma testosterone in females of a socially monogamous songbird: evidence of constraints on male evolution? by Clotfelter, Ethan D, O'Neal, Dawn M, Gaudioso, Jacqueline M, Casto, Joseph M, Parker-Renga, Ian M, Snajdr, Eric A, Duffy, Deborah L, Nolan, Val, Ketterson, Ellen D

“…To explore whether selection for testosterone-mediated traits in males might be constrained by costs of higher testosterone to females, we examined the effects…”
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Play, copulation, anatomy, and testosterone in gonadally intact male rats prenatally exposed to flutamide by Casto, Joseph M., Ward, O.Byron, Bartke, Andrzej

“…The role of prenatal androgen on the differentiation of sexually dimorphic juvenile play and adult copulatory patterns was evaluated in male offspring of rats…”
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Percutaneous Cement Injection into a Created Cavity for the Treatment of Vertebral Body Fracture: Preliminary Results of a New Vertebroplasty Technique by Vallejo, Ricardo, Benyamin, Ramsin, Floyd, Bonnie, Casto, Joseph M, Joseph, Ninos J, Mekhail, Nagi

“…OBJECTIVES:Vertebral body fractures (VBFs) are the most common complication of osteoporosis. Minimally invasive placement of cement to stabilize VBFs results…”
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Offspring Sex Ratio Is Unrelated to Male Attractiveness in Dark-Eyed Juncos (Junco hyemalis) by Grindstaff, Jennifer L., Buerkle, C. Alex, Casto, Joseph M., Nolan, Val, Ketterson, Ellen D.

“…Sex allocation theory predicts that parents should bias investment toward the offspring sex that confers higher relative fitness on the parents. When variance…”
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Characterizing the timing of Yolk Testosterone Metabolism and the effects of Etiocholanolone on development in Avian Eggs by Campbell, Nicole A, Angles, Rachel, Bowden, Rachel M, Casto, Joseph M, Paitz, Ryan T

“…Maternal transfer of steroids to eggs can elicit permanent effects on offspring phenotype. Although testosterone was thought to be a key mediator of maternal…”
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Early Administration of 17β-Estradiol Partially Masculinizes Song Control Regions and α2-Adrenergic Receptor Distribution in European Starlings (Sturnus vulgaris) by Casto, Joseph M., Ball, Gregory F.

“…The vocal control system in many songbird species is a sexually dimorphic neural circuit that mediates learning and production of song. The mechanism by which…”
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