...Michael S. Hedrick; David R. Jones ABSTRACT The purpose of this study was to investigate the roles of branchial and gas bladder reflex pathways in the control of gill ventilation and air-breathing in the bowfin Amia calva . We have previously determined that bowfin use two distinct air-breathing...

..., the patterns of muscle activity and muscle force production during escape are less well understood. We studied the fast-starts of two basal actinopterygian fishes ( Amia calva and Polypterus palmas ) to investigate the functional morphology of the fast-start and the role of intramuscular pressure (IMP...

...Matthieu R. Gervais; Bruce L. Tufts ABSTRACT The purpose of this study was to examine the subcellular distribution and isoenzyme characteristics of carbonic anhydrase from the gills and respiratory air bladder of bowfin Amia calva , a primitive air-breathing fish. Separation of subcellular...

... was undertaken to determine the significance of air-breathing in two fish species while exercising in oxygen-rich water. Oxygen consumption from air and water was measured during mild activity in bowfin ( Amia calva ) and spotted gar ( Lepisosteus oculatus ) by sealing a fish in an acrylic flume that contained...

... ). The characterisation of aerial ventilation patterns in fish as ‘aperiodic’ has been generally accepted on the basis of qualitative examination and it remains to be validated with rigorous testing. The bowfin, Amia calva (L.), is a primitive air-breathing fish that makes intermittent excursions to the air–water...

...Michael S. Hedrick; David R. Jones ABSTRACT The mechanisms and physiological control of air-breathing were investigated in an extant halecomorph fish, the bowfin ( Amia calva ). Air flow during aerial ventilation was recorded by pneumotachography in undisturbed Amia calva at 20–24°C while aquatic...

...David J. McKenzie; Mark L. Burleson; David J. Randall ABSTRACT The role of sensory afferent information from the gills of Amia calva in cardiovascular and ventilatory control was investigated by bilateral branchial denervation and pseudobranch ablation. Aquatic hypoxia or 1 mg of sodium cyanide...

... , but did not uniformly stimulate ventilation. These results suggest that central chemoreceptors, which mediate cardiovascular or ventilatory reflexes, are absent in Amia . 12 07 1990 © 1991 by Company of Biologists 1991 Amia calva fish hypoxia hypercapnia chemoreceptors...