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161 results for “stress physiology”
Data from: Stress in biological invasions: introduced invasive grey squirrels increase physiological stress in native Eurasian red squirrels
1. Invasive alien species can cause extinction of native species through processes including predation, interspecific competition for resources, or disease-mediated competition. Increases in stress hormones in vertebrates may be associated with these processes and contribute to the decline in survival or reproduction of the native species. 2. Eurasian red squirrels (Sciurus vulgaris) have gone extinct across much of the British Isles and parts of Northern Italy following the introduction of North American invasive grey squirrels (Sciurus carolinensis). We extracted glucocorticoid metabolites from faecal samples to measure whether the presence of the invasive species causes an increase in physiological stress in individuals of the native species. 3. We show that native red squirrels in seven sites where they co-occurred with invasive grey squirrels had glucocorticoid concentrations that were three times higher than those in five sites without the invasive species. Moreover, in a longitudinal study, stress hormones in native red squirrels increased after colonisation by grey squirrels. When we experimentally reduced the abundance of the invasive grey squirrels, the concentration of faecal glucocorticoid metabolites in co-occurring red squirrels decreased significantly between pre- and post-removal periods. 4. Hence, we found that the invasive species acts as a stressor which significantly increases the concentrations of glucocorticoids in the native species. 5. Given that sustained elevations in glucocorticoids could reduce body growth and reproductive rate, our results are consistent with previous studies where the co-occurrence of the invasive grey squirrel was associated with smaller size and lower reproductive output in red squirrels.
Biological and physiological responses of Bradysia odoriphaga 4th instar larvae to long-term constant and fluctuating mild heat stress
<p>Global climate change can expose insects to high-temperature stress, including extreme and mild heat stress. For soil insects, mild heat stress is more common than extreme heat stress. High summer temperature is a key barrier for Bradysia odoriphaga (Diptera: Sciaridae), a devastating soil pest of vegetables in China. The 4th instar larvae possess the strongest thermal tolerance to high temperatures. To determine whether the 4th instar larvae of B. odoriphaga possess other adaptations to summer mild heat stress besides thermal plasticity, we evaluated the biological performance of 4th instar larvae under constant and fluctuating long-term mild heat stress. The physiological responses were studied including energy storage, hormone level, and expression of related genes. Bioassay results indicated that 4th instar larvae survived, without pupation, for more than 40 days under long-term mild heat stress (34°C). Combined with constant and fluctuating treatment, mild heat stress delayed larval development, reduced longevity, and reduced fecundity. However, a summer diapause-like phenomenon was observed, including larval development stasis under mild heat stress and a prolonged recovery time after mild heat stress. Protective physiological responses were involved in regulating the larval stage including accumulating fat and glycogen, a high level of juvenile hormone, and a low level of molting hormone. Also, high expression levels of hsp70 and hsp90 were detected. The delayed development of B. odoriphaga 4th instar larvae appears to be a special adaptation strategy to withstand mild heat stress in summer, and it is regulated by complex physiological processes.</p>
Physiological responses of rosewoods Dalbergia cochinchinensis and D. oliveri under drought and heat stresses
<i>Dalbergia cochinchinensis</i> and <i>D. oliveri</i> are classified as vulnerable and endangered respectively in the IUCN Red List and under continued threat from deforestation and illegal harvesting for rosewood. Despite emerging efforts to conserve and restore these species, little is known of their responses to drought and heat stress, which are expected to increase in the Greater Mekong Subregion where the species co-occur and are endemic. In this study of isolated and combined drought and heat effects, we found that <i>D. oliveri</i> had an earlier stomatal closure and more constant midday water potential in response to increasing drought level, suggesting that <i>D. oliveri</i> is relatively isohydric while <i>D. cochinchinensis</i> is relatively anisohydric. Heat shock and drought had synergistic effects on stomatal closure. Our results indicate contrasting relationships in water relations, photosynthetic pigment levels and total soluble sugars. An increase in chlorophyll a was observed in <i>D. cochinchinensis</i> during drought and a concomitant increase in carotenoid content likely afforded protection against photo-oxidation. These physiological changes correlated with higher total soluble sugars in <i>D. cochinchinensis</i>. By contrast, <i>D. oliveri</i> avoided drought by reducing chlorophyll content and compromising productivity. Anisohydry and drought tolerance in <i>D. cochinchinensis</i> are adaptations which fit well with its ecological niche as a pioneering species with faster growth in young trees. We believe this understanding of the stress responses of both species will be crucial to their effective regeneration and conservation in degraded habitats and in the face of climate change.
The Effects of Dietary Factors on Physiological Subjective Stress Responses
ClinicalTrials.gov study NCT01544270. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Effects of Root Extract Ashwagandha (KSM-66) on Physiological Stress, Perception of Recovery and Muscle Strength in Youth Elite Footballers
ClinicalTrials.gov study NCT07343219. IPD Sharing: YES. Countries: 1. Publications: 3.
The Effect of Facilitated Tucking After Vaginal Delivery on Late Preterm Stress, Comfort and Physiological Parameters
ClinicalTrials.gov study NCT05430321. IPD Sharing: YES. Countries: 1. Publications: 5.
Metabolic and Physiological Stress During Skiing.
ClinicalTrials.gov study NCT02082106. IPD Sharing: Not stated. Countries: 1. Publications: 4.
The Effect of Stress Ball Used During Intra Uterine Insemination on Pain, Anxiety, Comfort and Physiological Parameters
ClinicalTrials.gov study NCT06759337. IPD Sharing: NO. Countries: 1. Publications: 17.
Impact of Early Intervention on Maternal Stress in Mothers of Fetuses Diagnosed With Single Ventricle Physiology
ClinicalTrials.gov study NCT02462434. IPD Sharing: Not stated. Countries: 1. Publications: 16.
Physiological, Hormonal, and DNA-based Mechanisms of Psychosocial Stress and Therapeutic Effect
ClinicalTrials.gov study NCT07152652. IPD Sharing: NO. Countries: 1. Publications: 4.
Salivary Cortisol as Stress Marker in Newborns Subjected to Double Weighing With Physiological Body Weight
ClinicalTrials.gov study NCT03830437. IPD Sharing: NO. Countries: 1. Publications: 15.
Chronic Effects of Euphytose® on Psychological and Physiological Measures of Stress
ClinicalTrials.gov study NCT03909906. IPD Sharing: NO. Countries: 1. Publications: 1.
Stress Level, Skin Moisture and Physiological Parameters in the First Bath of Newborns
ClinicalTrials.gov study NCT07109908. IPD Sharing: Not stated. Countries: 1. Publications: 7.
The Effect Of Getting Children Between 3-6 To Watch Small Aquarium Fish On Physiological Parameters, Pain and Stress During Blood Collection
ClinicalTrials.gov study NCT05252494. IPD Sharing: NO. Countries: 0. Publications: 7.
Effect of Stress Ball Applied During Surgical Debridement/Dressing on Pain, Distress, and Physiological Parameters in Patients With Diabetic Foot Ulcers
ClinicalTrials.gov study NCT07119983. IPD Sharing: YES. Countries: 1. Publications: 10.
The Effect of Bath Applied in Two Different Sequences on Stress Level and Physiological Parameters in Term Babies
ClinicalTrials.gov study NCT06166485. IPD Sharing: NO. Countries: 1. Publications: 7.
The Effects of Physical Training on Physiological and Psychological Stress-reactions and Cognitive Function.
ClinicalTrials.gov study NCT02051127. IPD Sharing: Not stated. Countries: 1. Publications: 1.
THE EFFECT OF MOTHER'S VOICE AND LULLABY ON PRETERM INFANTS' PHYSIOLOGICAL PARAMETERS, STRESS AND SLEEPING- WAKING STATE
ClinicalTrials.gov study NCT04886648. IPD Sharing: NO. Countries: 0. Publications: 5.
CBART: The Reduction of Psychological and Physiological Stress in Women Undergoing IVF
ClinicalTrials.gov study NCT03459053. IPD Sharing: NO. Countries: 1. Publications: 4.
Cortisol Levels as a Measure of Accumulated Physiological Stress in ICU Patients Undergoing Mechanical Ventilation
ClinicalTrials.gov study NCT03736135. IPD Sharing: Not stated. Countries: 1. Publications: 13.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.