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80 results for “incubation temperature”
Pilot Clinical Assessment of Low-cost Infant Incubator in Monitoring Temperature and Treating Hypothermia in Infants
ClinicalTrials.gov study NCT03965312. IPD Sharing: NO. Countries: 1. Publications: 1.
Data from: Plasticity in incubation behavior and shading by king rails (Rallus elegans) in response to temperature
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Ambient temperature and female body condition are related to night incubation behavior in wood ducks (Aix sponsa)
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Data from: Nest-box temperature affects clutch size, incubation initiation, and nestling health in great tits
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Data from: High atmospheric temperatures and ‘ambient incubation’ drive embryonic development and lead to earlier hatching in a passerine bird
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Data from: Long-term consequences of high incubation temperature in a wild bird population
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Data from: Incubation temperature and social context affect the nest exodus of precocial ducklings
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Data from: Incubation temperature affects growth and energy metabolism in blue tit nestlings
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Data from: Higher incubation temperatures produce long-lasting upward shifts in cold tolerance, but not heat tolerance, of hatchling geckos
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Data from: Free‐moving artificial eggs containing temperature loggers reveal remarkable within‐clutch variance in incubation temperature
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Impacts of ambient temperature and clutch size on incubation behaviour onset in a female-only incubator songbird
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Data from: Incubation temperature and parental identity determine sex in the Australian agamid lizard Ctenophorus pictus
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Trachemys scripta gene expression data under constant and fluctuating incubation temperatures
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Temperature-mediated plasticity in incubation schedules is unlikely to evolve to buffer embryos from climatic challenges in a seasonal songbird
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Using naturalistic incubation temperatures to demonstrate how variation in the timing and continuity of heat wave exposure influences phenotype
<p>Most organisms are exposed to bouts of warm temperatures during development, yet we know little about how variation in the timing and continuity of heat exposure influences biological processes. If heat waves increase in frequency and duration as predicted, it is necessary to understand how these bouts could affect thermally sensitive species, including reptiles with temperature-dependent sex determination (TSD). In a multi-year study using fluctuating temperatures, we exposed <i>Trachemys scripta</i> embryos to cooler, male-producing temperatures interspersed with warmer, female-producing temperatures (heat waves) that varied in either timing during development or continuity and then analyzed resulting sex ratios. We also quantified the expression of genes involved in testis differentiation (<i>Dmrt1</i>) and ovary differentiation (<i>Cyp19A1</i>) to determine how heat wave continuity affects the expression of genes involved in sexual differentiation. Heat waves applied during the middle of development produced significantly more females compared to heat waves that occurred just 7 days before or after this window, and even short gaps in the continuity of a heat wave decreased the production of females. Continuous heat exposure resulted in increased <i>Cyp19A1 </i>expression while discontinuous heat exposure failed to increase expression in either gene over a similar time course. We report that even small differences in the timing and continuity of heat waves can result in drastically different phenotypic outcomes. This strong effect of temperature occurred despite the fact that embryos were exposed to the same number of warm days during a short period of time, which highlights the need to study temperature effects under more ecologically relevant conditions where temperatures may be elevated for only a few days at a time. In the face of a changing climate, the finding that subtle shifts in temperature exposure result in substantial effects on embryonic development becomes even more critical.</p>
Data from: Exposure of avian embryos to cycling incubation temperatures reduces adult bactericidal ability
In birds, the temperature at which eggs are incubated shapes many aspects of hatchling phenotype, but long-term effects are less studied. We studied the effect of incubation temperature and pattern on the subsequent development of innate immune function in Japanese quail (Coturnix japonica). We incubated quail eggs in one of three replicated treatments: Control (37.5°C), Low (36.0°C), and Cyclical incubation. The Cyclical treatment had the same average temperature as the Low temperature treatment (36.0°C), and an upper temperature that was the same as the Control. When individuals were 5-, 20-, and 55-days of age (i.e., adults) we measured the ability of blood plasma to kill Escherichia coli. Throughout development there was a non- significant trend for immune function to be lower in the Cycling treatment. In adulthood however, individuals incubated at Cycling temperatures had significantly lower immune function than control birds but did not differ from individuals incubated at constant low temperatures. Males and females responded similarly to the incubation treatment, but females developed a greater bactericidal ability than males. We conclude that variation in innate immune function of adult birds is shaped by temperature fluctuations experienced during incubation.
Data from: Constant and cycling incubation temperatures have long-term effects on the morphology and metabolic rate of Japanese quail
Incubation temperature can have profound effects on growth and development of embryos and young birds. However, few studies have examined the role that cycling incubation temperature may play in phenotypic variation and whether these effects persist to adulthood. We incubated Japanese quail eggs at control temperatures (37.5°C), at low temperatures (36.0°C), and under a cyclical treatment that maintained the same average temperature as the low treatment (36.0°C) with high temperatures that were the same as the control (37.5°C) and low temperatures that still allowed for development of the embryo (28.0°C). Individuals in the low treatment group were smaller in mass and size than individuals in the control group but had an increased basal metabolic rate relative to individuals in the cyclical treatment group. Temperature cycling offset the effects of low incubation temperatures on metabolic rate and embryonic development but not the effects on adult mass and size. Although Japanese quail are sexually size dimorphic, with females larger than males, we could detect no evidence of sex-specific sensitivity to suboptimal incubation temperatures. These results highlight the importance of incubation temperature and pattern as sources of morphological and physiological variation of adult birds.
Data from: Are thyroid hormones mediators of incubation temperature-induced phenotypes in birds?
Incubation temperature influences a suite of traits in avian offspring. However, the mechanisms underlying expression of these phenotypes are unknown. Given the importance of thyroid hormones in orchestrating developmental processes, we hypothesized that they may act as an upstream mechanism mediating the effects of temperature on hatchling phenotypic traits such as reduced growth and thermoregulation. We found that plasma T3, but not T4 concentrations, differed among newly-hatched wood ducks (Aix sponsa) from different embryonic incubation temperatures. T4 at hatching correlated with time spent hatching, and T3 correlated with hatchling body condition, tarsus length, time spent hatching, and incubation period. In addition, the T3:T4 ratio differed among incubation temperatures up at hatch. Our findings are consistent with the hypothesis that incubation temperature modulates plasma thyroid hormones which in turn influences multiple aspects of duckling phenotype.
Incubation temperature and physiological aging in the zebra finch
<p>In birds, incubation temperature has received increased attention as an important source of phenotypic variability in offspring. A lower than optimal incubation temperature may negatively affect aspects of nestling physiology, such as body growth and energy metabolism. However, the long-term effects of sub-optimal incubation temperature on morphology and physiology are not well understood. In a previous study, we showed that zebra finches from eggs incubated at a low temperature (35.9°C) for 2/3 of the total incubation time suffered a lower post-fledging survival compared to individuals that had been incubated at higher temperatures (37.0 and 37.9°C). In the present study, we investigated whether these variations in incubation temperature could cause permanent long-lasting differences in body mass, body size, or basal metabolic rate. Furthermore, we tested whether the observed differences in survival between treatment groups would be reflected in the rate of physiological deterioration, assessed through oxidative damage and decreased metabolic rate with age (i.e. 'metabolic aging'). Incubation temperature did not significantly affect embryonic or nestling body growth and did not influence final adult body mass or body size. Nor was there any long-term effect on basal metabolic rate. Birds from eggs incubated at the lowest temperature experienced an accumulation of oxidative damage with age, although this was not accompanied by an accelerated rate of metabolic aging. The present results suggest that the low survival in these birds was possibly mediated by increased oxidative stress, but independent of body growth and the basal metabolic rate.</p>
Data from: Incubation temperature influences survival in a small passerine bird
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International Brain Laboratory public data
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