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Full-Text Articles in Biology
Shifts In Metabolic Demands In Growing Altricial Nestlings Illustrate Context-Specific Relationships Between Basal Metabolic Rate And Body Composition, Fraņois Vézina, Oliver P. Love, Mylaine Lessard, Tony D. Williams
Shifts In Metabolic Demands In Growing Altricial Nestlings Illustrate Context-Specific Relationships Between Basal Metabolic Rate And Body Composition, Fraņois Vézina, Oliver P. Love, Mylaine Lessard, Tony D. Williams
Integrative Biology Publications
Basal metabolic rate (BMR) in animals is interpreted as reflecting the size and metabolic intensity of energy-consuming tissues. However, studies investigating relationships between the mass of specific organs and interindividual variation in BMR have produced inconsistent patterns with regard to which organs have the largest impact on BMR variation. Because of the known flexibility in organ mass and metabolic intensity within individual organs, relationships between BMR and body- composition variables are bound to be context specific. Altricial nestlings are excellent models to illustrate this phenomenon because of the extreme variation in body composition occurring during growth. Using European starlings at …
Juveniles Exposed To Embryonic Corticosterone Have Enhanced Flight Performance, Eunice H. Chin, Oliver P. Love, Jan J. Verspoor, Tony D. Williams, Kyle Rowley, Gary Burness
Juveniles Exposed To Embryonic Corticosterone Have Enhanced Flight Performance, Eunice H. Chin, Oliver P. Love, Jan J. Verspoor, Tony D. Williams, Kyle Rowley, Gary Burness
Integrative Biology Publications
Exposure to maternally derived glucocorticoids during embryonic development impacts offspring phenotype. Although many of these effects appear to be transiently 'negative', embryonic exposure to maternally derived stress hormones is hypothesized to induce preparative responses that increase survival prospects for offspring in low-quality environments; however, little is known about how maternal stress influences longer-term survival-related performance traits in free-living individuals. Using an experimental elevation of yolk corticosterone (embryonic signal of low maternal quality), we examined potential impacts of embryonic exposure to maternally derived stress on flight performance, wing loading, muscle morphology and muscle physiology in juvenile European starlings (Sturnus vulgaris). Here …