GUGLIELMO, C.G.*; PIERSMA, T.; WILLIAMS, T.D.: Flight-Induced Muscle Damage And Avian Migration, Evidence From Two Shorebird Species It has often been suggested that birds undergo processes of repair and physiological recovery following long distance flights, however exactly what these processes are remains mostly undescribed. High intensity, long duration exercise is known to cause muscle damage, […]

PACKARD, G.C.*; PACKARD, M.J.: Environmentally Induced Variation in Size and Condition of Hatchling Painted Turtles We manipulated the contents of newly constructed nests of painted turtles (Chrysemys picta) so that each of three nests received two eggs from each of the same five females. The manipulation was replicated on three successive days, thereby yielding a […]

Lighton, J. R. B.*; Turner, R. J.: WATER AND CARBON DIOXIDE FLUX IN THE FLUTTER PHASE OF THE INSECT DISCONTINUOUS GAS EXCHANGE CYCLE (DGC). The insect DGC is characterized by extreme variations in carbon dioxide release and oxygen uptake rates. During the flutter or F phase of the DGC, oxygen diffuses inwards from a ca. […]

BRADLEY,T.J.: The Discontinuous Gas Exchange Cycle in Insects May Serve to Reduce Oxygen Supply to the Tissues The discontinuous gas exchange cycle (DGC) in insects, consists of a closed phase (C) during which the spiracular valves at the openings of the tracheae are closed, a flutter phase (F) when the spiracles open and close rapidly, […]

CROSSLEY, D. A.*; HICKS, J. W.; BENNETT, A.F.: Postprandial changes in cardio-respiratory responses of the Savannah monitor (Varanus exanthematicus Cardio-respiratory control has been well characterized in numerous endothermic vertebrates, however our understanding of these systems in ectothermic vertebrates remains poorly understood. The purpose of this study was to thoroughly assess the cardiovascular and pulmonary responses […]

GREENLEE, K.J.*; HARRISON, J.F.; EGBERT, K. : How does the respiratory response to hypoxia change throughout ontogeny in a grasshopper and a caterpillar? As insects age, body size can increase dramatically. For example, grasshoppers (Schistocerca americana) grow to 100 times their original mass, and larval tobacco hornworms (Manduca sexta) increase an impressive 7,000-fold from hatchling […]

Altshuler, D.L.*; Chai, Peng: Hovering performance of hummingbirds in hyperoxic gas mixtures We present a test of the hypothesis that inspiration of hyperoxic air increases hummingbird hovering performance when birds are challenged aerodynamically. We measured the maximum duration of hovering flight and the simultaneous oxygen consumption of ruby-throated hummingbirds (Archilochus colubris) in low density heliox […]

FOLK,D.F.*; BRADLEY,T.J.: How Does Selection for Desiccation Resistance Affect the Distribution of Water in Drosophila melanogaster? We are conducting experiments with five populations of Drosophila melanogaster, which have undergone laboratory selection for increased desiccation resistance for over 200 generations. For each population of desiccation-resistant flies (D flies), a control population (C flies) was maintained under […]

CLAIBORNE, J.B.*; GUNNING, D.L.; WALL, B.P.; MORRISON-SHETLAR, A.I.: Gill Na+/H+ antiporters (NHE) in marine fish The branchial epithelium in marine fish is the main site of acid-base transfers between the extracellular space and the environment. Na+/H+ exchange proteins (NHE) are thought to contribute to net acid excretion in these animals. We have used molecular and […]

LILLYWHITE, H.B.; TU, M.C.: First Ecdysis Increases Skin Resistance to Evaporative Water Loss in Newborn Snakes Aquatic-terrestrial transitions associated with nativity present numerous physiological challenges for terrestrial vertebrates, one being the requirement to limit excessive losses of water due to evaporation. Epidermal water barriers comprised of lipids prevent excessive water loss in the adults of […]