... respiration trachea scaling American locust Schistocerca americana Respiratory systems play a crucial intermediary role in the delivery of oxygen from the atmosphere to an animal's cells, and the volume of a respiratory system can provide an index of the investment made by an animal in its...

... create problems for oxygen delivery in older animals? We forced developing American locust grasshoppers ( Schistocerca americana ) to jump repeatedly and examined the effect of development on power output, endurance, lactate concentration, oxygen consumption and the oxygen sensitivity of jump performance...

... with a smaller safety margin for oxygen delivery in insects. * Author for correspondence (e-mail: kendra.greenlee@asu.edu ) 22 10 2003 © The Company of Biologists Limited 2004 2004 ontogeny insect grasshopper Schistocerca americana ventilation gas exchange hypoxia...

... pressure( P O ) for first-, third- and fifth-instar juveniles and adults of the American locust Schistocerca americana . We found that late-stage grasshoppers tended to have 40% higher total CO 2 emission rates but 15% lower mass-specific CO 2 emission rates and 35% higher ventilation frequencies than...

... mutabilis and Schistocerca americana respectively. The beetle muscle is the basalar; the locust muscle the tergosternal. (A,B) Transverse sections at identical magnification. Scale bar, 1 µm. Insets C–E are at greater magnification to show myofilament arrays. The scale bar in E, which also applies to C...

...Kendra J. Greenlee; Jon F. Harrison ABSTRACT How do quiescent insects maintain constant rates of oxygen consumption at ambient values as low as 2–5 kPa? To address this question, we examined the response of the American locust Schistocerca americana to hypoxia by measuring the effect of decreasing...

... address: Promega Corporation, 2800 Woods Hollow Road, Madison, WI 53711, USA 6 11 1997 22 12 1997 © 1998 by Company of Biologists 1998 molting ecdysis peptide myomodulin hormone Drosophila melanogaster Manduca sexta Schistocerca americana Inka enhancer trap...

...Scotti L. Gulinson; Jon F. Harrison ABSTRACT We examined the effect of extracellular acid–base status and tracheal gas levels on the ventilation rate of resting Romalea guttata and Schistocerca americana grasshoppers. We manipulated haemolymph pH and [HCO 3 - ] within normal physiological ranges...

... Limited 1996 chemosensory feedback grasshopper locomotion Melanoplus differentialis pH regulation of ventilation Schistocerca americana ventilation Our recordings of tracheal pressures during jumping show no evidence of the cyclic, smooth pressure pulsations associated...

...JEAN G. MALAMUD; ROBERT K. JOSEPHSON The force-velocity relationships during isotonic shortening were determined for the metathoracic second tergocoxal muscle of the locust Schistocerca americana (Drury). This muscle is a synchronous flight muscle. During the plateau of a tetanic contraction...

...R. F. Chapman; A. Ascoli-Christensen; P. R. White ABSTRACT The electrophysiological responses of sensilla on the tibia of Schistocerca americana (Drury) to six compounds were examined. All the compounds were shown to cause feeding deterrence at high concentrations. Nicotine hydrogen tartrate...

... to the octopamine-containing efferent DUM neurones, there are a substantial number of local and intersegmental DUM interneurones with small cell bodies ( Thompson and Siegler, 1989 , 1991 ). 17 12 1990 © 1991 by Company of Biologists 1991 Schistocerca americana grasshopper cockroach firefly...