Search Results - "Pérez, Jonathan H"

Experimental cooling during incubation leads to reduced innate immunity and body condition in nestling tree swallows by Ardia, Daniel R., Pérez, Jonathan H., Clotfelter, Ethan D.

“…Nest microclimate can have strong effects that can carry over to later life-history stages. We experimentally cooled the nests of tree swallows (Tachycineta…”
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A chromosome-level genome assembly of a free-living white-crowned sparrow (Zonotrichia leucophrys gambelii) by Wu, Zhou, Miedzinska, Katarzyna, Krause, Jesse S., Pérez, Jonathan H., Wingfield, John C., Meddle, Simone L., Smith, Jacqueline

“…The white-crowned sparrow, Zonotrichia leucophrys , is a passerine bird with a wide distribution and it is extensively adapted to environmental changes. It has…”
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Nest box orientation affects internal temperature and nest site selection by Tree Swallows by Ardia, Daniel R., Pérez, Jonathan H., Clotfelter, Ethan D.

“…Orientation of nests can influence nest microclimate, particularly temperature. However, few investigators have examined orientation preference and…”
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Revisiting TSHβ's Role in Avian Seasonal Reproduction, Insights and Challenges from Mammalian Models by Pérez, Jonathan H

“…The core neuroendocrine pathways regulating seasonal reproduction in vertebrates were characterized over a decade ago. This has led to the development of a…”
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A Comparative Perspective on Extra-retinal Photoreception by Pérez, Jonathan H., Tolla, Elisabetta, Dunn, Ian C., Meddle, Simone L., Stevenson, Tyler J.

“…Ubiquitous in non-mammalian vertebrates, extra-retinal photoreceptors (ERPs) have been linked to an array of physiological, metabolic, behavioral, and…”
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Regulation of vernal migration in Gambel's white-crowned sparrows: Role of thyroxine and triiodothyronine by Pérez, Jonathan H., Furlow, J. David, Wingfield, John C., Ramenofsky, Marilyn

“…Appropriate timing of migratory behavior is critical for migrant species. For many temperate zone birds in the spring, lengthening photoperiod is the initial…”
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Light receptors in the avian brain and seasonal reproduction by Pérez, Jonathan H.

“…Detection and transduction of photic cues by nonvisual photoreceptors, located in the deep brain, is a critical component of timing seasonal reproduction in…”
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How birds cope physiologically and behaviourally with extreme climatic events by Wingfield, John C., Pérez, Jonathan H., Krause, Jesse S., Word, Karen R., González-Gómez, Paulina L., Lisovski, Simeon, Chmura, Helen E.

“…As global climate change progresses, the occurrence of potentially disruptive climatic events such as storms are increasing in frequency, duration and…”
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Effects of short-term fasting on stress physiology, body condition, and locomotor activity in wintering male white-crowned sparrows by Krause, Jesse S, Pérez, Jonathan H, Meddle, Simone L, Wingfield, John C

“…Abstract For wild free-living animals the availability of food resources can be greatly affected by environmental perturbations such as weather events. In…”
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The effect of extreme spring weather on body condition and stress physiology in Lapland longspurs and white-crowned sparrows breeding in the Arctic by Krause, Jesse S, Pérez, Jonathan H, Chmura, Helen E, Sweet, Shannan K, Meddle, Simone L, Hunt, Kathleen E, Gough, Laura, Boelman, Natalie, Wingfield, John C

“…Highlights • Climate change is increasing the occurrence of extreme weather events. • The spring of 2013 was extreme with record low temperatures and snow…”
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Functional inhibition of deep brain non-visual opsins facilitates acute long day induction of reproductive recrudescence in male Japanese quail by Pérez, Jonathan H., Tolla, Elisabetta, Bishop, Valerie R., Foster, Russell G., Peirson, Stuart N., Dunn, Ian C., Meddle, Simone L., Stevenson, Tyler J.

“…For nearly a century, we have known that brain photoreceptors regulate avian seasonal biology. Two photopigments, vertebrate ancient opsin (VA) and neuropsin…”
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Effects of thyroid hormone manipulation on pre-nuptial molt, luteinizing hormone and testicular growth in male white-crowned sparrows (Zonotrichia leuchophrys gambelii) by Pérez, Jonathan H., Meddle, Simone L., Wingfield, John C., Ramenofsky, Marilyn

“…•Inhibition of thyroid hormone abolishes pre-nuptial molt and gonadal growth.•Exogenous T4 or T3 restores pre-nuptial molt.•Exogenous T4 but not T3 restores…”
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The stress response is attenuated during inclement weather in parental, but not in pre-parental, Lapland longspurs (Calcarius lapponicus) breeding in the Low Arctic by Krause, Jesse S., Pérez, Jonathan H., Chmura, Helen E., Meddle, Simone L., Hunt, Kathleen E., Gough, Laura, Boelman, Natalie, Wingfield, John C.

“…Birds breeding at high latitudes can be faced with extreme weather events throughout the breeding season. In response to environmental perturbations,…”
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Breeding on the leading edge of a northward range expansion: differences in morphology and the stress response in the arctic Gambel’s white-crowned sparrow by Krause, Jesse S., Chmura, Helen E., Pérez, Jonathan H., Quach, Lisa N., Asmus, Ashley, Word, Karen R., McGuigan, Michaela A., Sweet, Shannan K., Meddle, Simone L., Gough, Laura, Boelman, Natalie, Wingfield, John C.

“…Individuals at the forefront of a range shift are likely to exhibit phenotypic traits that distinguish them from the population breeding within the historic…”
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Gene expression of sex steroid metabolizing enzymes and receptors in the skeletal muscle of migrant and resident subspecies of white-crowned sparrow (Zonotrichia leucophrys) by Krause, Jesse S., Watkins, Trevor, Reid, Angus M. A., Cheah, Jeffrey C., Pérez, Jonathan H., Bishop, Valerie R., Ramenofsky, Marilyn, Wingfield, John C., Meddle, Simone L.

“…Circulating sex steroid concentrations vary dramatically across the year in seasonally breeding animals. The ability of circulating sex steroids to effect…”
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Tissue-specific expression of 11β-HSD and its effects on plasma corticosterone during the stress response by Pérez, Jonathan H, Swanson, Ryan E, Lau, Hannah J, Cheah, Jeffrey, Bishop, Valerie R, Snell, Katherine R S, Reid, Angus M A, Meddle, Simone L, Wingfield, John C, Krause, Jesse S

“…The hypothalamic-pituitary-adrenal (HPA) axis is under complex regulatory control at multiple levels. Enzymatic regulation plays an important role in both…”
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Temperature and life history: experimental heating leads female tree swallows to modulate egg temperature and incubation behaviour by Ardia, Daniel R., Pérez, Jonathan H., Chad, Elise K., Voss, Margaret A., Clotfelter, Ethan D.

“…1. Life-history decisions are strongly affected by environmental conditions. In birds, incubation is energetically expensive and affected significantly by…”
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Acute restraint stress does not alter corticosteroid receptors or 11β-hydroxysteroid dehydrogenase gene expression at hypothalamic–pituitary-adrenal axis regulatory sites in captive male white-crowned sparrows (Zonotrichia leucophrys gambelii) by Krause, Jesse S., Pérez, Jonathan H., Reid, Angus M.A., Cheah, Jeffrey, Bishop, Valerie, Wingfield, John C., Meddle, Simone L.

“…•Captive songbirds were exposed to a standardized restraint handling stress protocol.•Gene expression was quantified in the hippocampus, hypothalamus,…”
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Annual Hematocrit Profiles in Two Subspecies of White-Crowned Sparrow: A Migrant and a Resident Comparison by Krause, Jesse S., Németh, Zoltán, Pérez, Jonathan H., Chmura, Helen E., Ramenofsky, Marilyn, Wingfield, John C.

“…Hematocrit is an easily measured parameter that can be used to assess changes in oxygen carrying capacity necessitated by fluctuations in metabolic demands…”
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Seasonal differences in hypothalamic thyroid‐stimulating hormone β, gonadotropin‐releasing hormone‐I and deiodinase expression between migrant and resident subspecies of white‐crowned sparrow (Zonotrichia leucophrys) by Pérez, Jonathan H., Krause, Jesse S., Bishop, Valerie R., Reid, Angus M. A., Sia, Michael, Wingfield, John C., Meddle, Simone L.

“…Across taxa, the seasonal transition between non‐breeding and breeding states is controlled by localised thyroid hormone signalling in the deep brain via…”
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