...Sean A. Williamson; Stephanie K. Courtney Jones; Adam J. Munn Phenotypic plasticity of organ size allows some animals to manage fluctuations of resource quality or availability. Here, we examined the phenotypic plasticity of the gastrointestinal tract of king quail ( Coturnix chinensis ) in a diet...

... of energy expenditure by simultaneous indirect and direct calorimetry in a small mammal (the kangaroo rat Dipodomys merriami Mearns), a small bird (the dove Columbina inca Lesson ) and a medium-sized bird (the quail Coturnix communis Linnaeus). We find that conventional respirometric estimates of energy...

... responses of the gizzard of adult Japanese quail ( Coturnix japonica ) to experimental mismatches of load and capacity were tested by a series of diet-switching experiments, involving an increased content of non-digestable fibre (NDF) in the diet. The results of all experiments were in accordance...

... of mean f H were made for individual quail by ballistocardiogram (BCG) during incubation, and by both piezo-electric film and electrocardiogram (ECG) during the posthatching period (resting and thermoneutral conditions). Mean f H of all embryos increased during the second half of incubation and the first...

... 1993 © 1993 by Company of Biologists 1993 reptile bird chorioallantois vascular density gas exchange chicken Gallus gallus quail Coturnix coturnix turtle Chelydra serpentina A major determinant of the rate of diffusive exchange of gases in animals is the morphology...

... (1988) . After preservation, a section of chorioallantoic membrane from each egg was gently peeled away and floated off the egg shell. The membrane was stained with Methylene Blue for approximately 1min (chicken and quail) or 2min (turtle) to improve the visualization of blood vessels. The membrane...

... production of exercising birds would be higher than that for resting birds in still air but would not differ significantly from the metabolic heat generated by resting birds exposed to similar convective conditions. To test our hypothesis we measured whole-animal oxygen consumption of Gambel’s quail...

...Esa Hohtola; E. Don Stevens ABSTRACT We measured the electrical activity and the tremor of the pectoral muscle and total body heat production in control and cold-acclimated Japanese quail at +26°C, + 12°C and +2°C before and after 3 weeks of acclimation, using electromyography, accelerometer...