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Keywords: oxygen
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Journal Articles
J Exp Biol (2020) 223 (21): jeb222133.
Published: 12 November 2020
... aimed to determine whether individual oxygen demand influenced the behaviour of entire groups. Groups of seven fish were observed in an arena to measure air-breathing frequency of individuals and consequent group air-breathing behaviour, under three oxygen concentrations (100%, 60% and 20% air...
Journal Articles
J Exp Biol (2019) 222 (22): jeb206896.
Published: 21 November 2019
...Gigi Y. Lau; Sabine Arndt; Michael P. Murphy; Jeffrey G. Richards ABSTRACT Animals that inhabit environments that fluctuate in oxygen must not only contend with disruptions to aerobic metabolism, but also the potential effects of reactive oxygen species (ROS). The goal of this study was to compare...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (11): jeb200410.
Published: 10 June 2019
... reactive oxygen species (ROS) after prolonged anoxia, but the mechanisms are unclear. Here, we investigated whether this mitochondrial suppression originates from downregulation of mitochondrial content or intrinsic activity by comparing heart mitochondria from (1) warm (25°C) normoxic, (2) cold-acclimated...
Journal Articles
J Exp Biol (2019) 222 (6): jeb191353.
Published: 18 March 2019
...Jules B. L. Devaux; Anthony J. R. Hickey; Gillian M. C. Renshaw ABSTRACT Exposure to anoxia leads to rapid ATP depletion, alters metabolic pathways and exacerbates succinate accumulation. Upon re-oxygenation, the preferential oxidation of accumulated succinate most often impairs mitochondrial...
Journal Articles
J Exp Biol (2018) 221 (19): jeb185553.
Published: 05 October 2018
...Matthew A. Birk; Agnieszka K. Dymowska; Brad A. Seibel ABSTRACT Squid are thought to obtain a large portion of their oxygen via simple diffusion across the skin in addition to uptake at the gills. Although this hypothesis has support from indirect evidence and is widely accepted, no empirical...
Journal Articles
J Exp Biol (2018) 221 (8): jeb177568.
Published: 25 April 2018
... examined alternative paths of gas exchange in sea spiders: (1) oxygen diffuses across pores in the cuticle, a common mechanism in terrestrial eggshells, (2) oxygen diffuses directly across the cuticle, a common mechanism in small aquatic insects, or (3) oxygen diffuses across both pores and cuticle. We...
Includes: Supplementary data
Journal Articles
J Exp Biol (2017) 220 (12): 2236–2242.
Published: 15 June 2017
... dissolved oxygen (20%, 100% and 150% saturation), dissolved carbon dioxide (9.5 and 19.1 µmol l −1 ) and water flow (1–1.6 versus 4–13 cm s −1 ) in a repeated measures design. Dark respiration was enhanced by increased flow and increased oxygen saturation in an interactive way, which relates to improved...
Journal Articles
J Exp Biol (2017) 220 (6): 995–1007.
Published: 15 March 2017
... a morphometric model of the canal system, we also show that filter feeding may be more energetically costly than previously thought. Measurements of volumetric flow rates and oxygen removal in five species of demosponge show that pumping rates are variable within and between species, with the more...
Includes: Supplementary data
Journal Articles
J Exp Biol (2016) 219 (19): 3126–3136.
Published: 01 October 2016
...H. Arthur Woods; Steven J. Lane ABSTRACT Many terrestrial insects live in environments that flood intermittently, and some life stages may spend days underwater without access to oxygen. We tested the hypothesis that terrestrial insects with underground pupae show respiratory adaptations for...
Includes: Supplementary data
Journal Articles
J Exp Biol (2015) 218 (23): 3807–3815.
Published: 01 December 2015
... DGCs are terminated as a result of inadequate oxygen supply to the tissues. 8 6 2015 2 10 2015 © 2015. Published by The Company of Biologists Ltd 2015 Summary: This study shows that haemolymph loss and energy metabolism combine to affect the ability of insects to maintain...
Journal Articles
J Exp Biol (2015) 218 (18): 2840–2846.
Published: 01 September 2015
... 10°C range β oxygen capacitance of water Aquatic insect Metabolic rate Optode Oxygen Respiration Spiracle Tracheal system Summary: The surface of the aquatic bug Aphelocheirus aestivalis is covered with a film of air that acts as a permanent gill and allows this...
Journal Articles
J Exp Biol (2014) 217 (9): 1543–1554.
Published: 01 May 2014
...Lutz T. Wasserthal Respiration in insects is thought to be independent of the circulatory system because insects typically lack respiratory pigments and because oxygen transport occurs in the gaseous phase through a ramified tracheal system by diffusion and convection directly to the tissues. In...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (8): 1205–1214.
Published: 15 April 2014
...D. J. Randall; J. L. Rummer; J. M. Wilson; S. Wang; C. J. Brauner Teleost fishes constitute 95% of extant aquatic vertebrates, and we suggest that this is related in part to their unique mode of tissue oxygenation. We propose the following sequence of events in the evolution of their oxygen...
Journal Articles
J Exp Biol (2014) 217 (1): 46–56.
Published: 01 January 2014
... ) Competing interests The author declares no competing financial interests. © 2014. Published by The Company of Biologists Ltd 2014 Comparative animal physiology Ecophysiology Field experiments Hemocyanin Natural experiments -omics approaches Oxygen Respiration biology Hypoxia...
Journal Articles
J Exp Biol (2013) 216 (23): 4334–4340.
Published: 01 December 2013
...Viviane Callier; Alexander W. Shingleton; Colin S. Brent; Shampa M. Ghosh; Jinkyu Kim; Jon F. Harrison SUMMARY Rearing oxygen level is known to affect final body size in a variety of insects, but the physiological mechanisms by which oxygen affects size are incompletely understood. In Manduca sexta...
Includes: Supplementary data
Journal Articles
J Exp Biol (2012) 215 (15): 2560–2566.
Published: 01 August 2012
... defence. To understand whether nitric oxide (NO), a major regulator of vasodilatation and oxygen consumption, may be involved in the adaptive response of Trachemys to anoxia, we measured NO metabolites (nitrite, S- nitroso, Fe-nitrosyl and N- nitroso compounds) in the plasma and red blood cells of venous...
Journal Articles
J Exp Biol (2012) 215 (12): 1995–2002.
Published: 15 June 2012
... comparative framework. * Author for correspondence ( moran@clemson.edu ) 11 11 2011 21 2 2012 © 2012. 2012 body size evolution Bergmann carbonate temperature–size rule temperature oxygen polar ocean Arctic Antarctic optimality models life history ‘ ...as the...
Journal Articles
J Exp Biol (2011) 214 (18): 3005–3012.
Published: 15 September 2011
... during hypoxia and the role played by the hypoxia-responsive gene leptin. * Author for correspondence ( gracey@usc.edu ) 22 6 2011 © 2011. 2011 hypoxia fish triglyceride microarray transcriptome oxygen leptin For many aquatic organisms, conditions of low dissolved...
Includes: Supplementary data
Journal Articles
J Exp Biol (2011) 214 (9): 1419–1427.
Published: 01 May 2011
...Erica C. Heinrich; Manoush Farzin; C. Jaco Klok; Jon F. Harrison SUMMARY Animals reared in hypoxic environments frequently exhibit smaller body sizes than when reared under normal atmospheric oxygen concentrations. The mechanisms responsible for this widely documented pattern of body size...
Journal Articles
J Exp Biol (2010) 213 (20): 3441–3448.
Published: 15 October 2010
...Brenda Rascón; Jon F. Harrison SUMMARY Oxygen provides the substrate for most ATP production, but also serves as a source of reactive oxygen species (ROS), which can induce cumulative macromolecular oxidative damage and cause aging. Pure oxygen atmospheres (100 kPa) are known to strongly reduce...