Jonathan H. Pérez
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View article: Genome assemblies of Nuttall’s White-crowned sparrow (Zonotrichia leucophrys nuttalli) and Rufous-collared sparrow (Zonotrichia capensis)
Genome assemblies of Nuttall’s White-crowned sparrow (Zonotrichia leucophrys nuttalli) and Rufous-collared sparrow (Zonotrichia capensis) Open
The Zonotrichia sparrows, belonging to the Passerellidae family, are widely studied for their vocalizations and genetic diversity. Here, we present two high-quality genome assemblies for Zonotrichia species; the northern hemisphere Nuttall…
View article: Hypotheses in light detection by vertebrate ancient opsin in the bird brain
Hypotheses in light detection by vertebrate ancient opsin in the bird brain Open
Extra‐retinal photoreception is common across fish and avian species. In birds, the hypothalamus contains non‐visual photoreceptors that detect light and regulate multiple endocrine systems. To date, light‐dependent control of seasonal rep…
View article: Revisiting TSHβ’s Role in Avian Seasonal Reproduction, Insights, and Challenges from Mammalian Models
Revisiting TSHβ’s Role in Avian Seasonal Reproduction, Insights, and Challenges from Mammalian Models Open
The core neuroendocrine pathways regulating seasonal reproduction in vertebrates were characterized over a decade ago. This has led to the development of a “consensus” model of seasonal reproduction that appears to be largely conserved acr…
View article: Seasonal differences in hypothalamic thyroid‐stimulating hormone β, gonadotropin‐releasing hormone‐I and deiodinase expression between migrant and resident subspecies of white‐crowned sparrow ( <i>Zonotrichia leucophrys</i> )
Seasonal differences in hypothalamic thyroid‐stimulating hormone β, gonadotropin‐releasing hormone‐I and deiodinase expression between migrant and resident subspecies of white‐crowned sparrow ( <i>Zonotrichia leucophrys</i> ) Open
Across taxa, the seasonal transition between non‐breeding and breeding states is controlled by localised thyroid hormone signalling in the deep brain via reciprocal switching of deiodinase enzyme expression from type 3 (DIO3) to type 2 (DI…
View article: Author response for "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 )"
Author response for "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 )" Open
Across taxa, the seasonal transition between non-breeding and breeding states is controlled by localised thyroid hormone signalling in the deep brain via reciprocal switching of deiodinase enzyme expression from type 3 (DIO3) to type 2 (DI…
View article: Author response for "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 )"
Author response for "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 )" Open
Across taxa, the seasonal transition between non-breeding and breeding states is controlled by localised thyroid hormone signalling in the deep brain via reciprocal switching of deiodinase enzyme expression from type 3 (DIO3) to type 2 (DI…
View article: Parental methyl-enhanced diet and in ovo corticosterone affect first generation Japanese quail (Coturnix coturnix japonica) development, behaviour and stress response.
Parental methyl-enhanced diet and in ovo corticosterone affect first generation Japanese quail (Coturnix coturnix japonica) development, behaviour and stress response. Open
The role of maternal investment on avian offspring has considerable life history implications on production traits and therefore potential for the poultry industry. A first generation (G1) of Japanese quail (Coturnix coturnix japonica) wer…
View article: Tissue specific expression of 11BHSD and its effects on plasma corticosterone during the stress response
Tissue specific expression of 11BHSD and its effects on plasma corticosterone during the stress response Open
The hypothalamic-pituitary-adrenal (HPA) axis is under complex regulatory control at multiple levels. Enzymatic regulation plays an important role in both circulating levels and target tissue exposure. Three key enzyme pathways are respons…
View article: Eavesdropping on the Arctic: Automated bioacoustics reveal dynamics in songbird breeding phenology
Eavesdropping on the Arctic: Automated bioacoustics reveal dynamics in songbird breeding phenology Open
Soundscape-level acoustic recordings revealed delay in arrival of songbird community to arctic breeding grounds.
View article: Contrasting seasonal and aseasonal environments across stages of the annual cycle in the rufous‐collared sparrow, <i>Zonotrichia capensis</i>: Differences in endocrine function, proteome and body condition
Contrasting seasonal and aseasonal environments across stages of the annual cycle in the rufous‐collared sparrow, <i>Zonotrichia capensis</i>: Differences in endocrine function, proteome and body condition Open
The timing and duration of life‐history stages ( LHS s) within the annual cycle can be affected by local environmental cues which are integrated through endocrine signalling mechanisms and changes in protein function. Most animals express …
View article: How birds cope physiologically and behaviourally with extreme climatic events
How birds cope physiologically and behaviourally with extreme climatic events Open
As global climate change progresses, the occurrence of potentially disruptive climatic events such as storms are increasing in frequency, duration and intensity resulting in higher mortality and reduced reproductive success. What constitut…
View article: Behavioral and physiological traits of migrant and resident White-crowned Sparrows: a common garden approach
Behavioral and physiological traits of migrant and resident White-crowned Sparrows: a common garden approach Open
To accommodate a migratory life history, migrants express a greater number of physiological and behavioral stages per annum than residents and are thus considered to have higher finite state diversity (FSD). To investigate the physiologica…
View article: The stress response is attenuated during inclement weather in parental, but not in pre-parental, Lapland longspurs (Calcarius lapponicus) breeding in the Low Arctic
The stress response is attenuated during inclement weather in parental, but not in pre-parental, Lapland longspurs (Calcarius lapponicus) breeding in the Low Arctic Open
Birds breeding at high latitudes can be faced with extreme weather events throughout the breeding season. In response to environmental perturbations, vertebrates activate the hypothalamic-pituitary-adrenal (HPA) axis and synthesize cortico…
View article: Nestling growth rates in relation to food abundance and weather in the Arctic
Nestling growth rates in relation to food abundance and weather in the Arctic Open
Raising nestlings to fledging is energetically demanding for songbirds, requiring parents to balance several major tradeoffs. Nestling growth rates are highly susceptible to variation in environmental conditions and parental investment, an…
View article: 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
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 Open
Individuals at the forefront of a range shift are likely to exhibit phenotypic traits that distinguish them from the population breeding within the historic range. Recent studies have examined morphological, physiological and behavioral ph…