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Keywords: Hypercapnia
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Journal Articles
J Exp Biol jeb.245324.
Published: 8 March 2023
... environment. Therefore, we hypothesized that tenrecs are tolerant to environmental hypoxia and hypercapnia. Many hypoxia- and hypercapnia-tolerant fossorial mammals respond to hypoxia by decreasing metabolic rate and thermogenesis and have blunted ventilatory responses to both environmental hypoxia...
Journal Articles
J Exp Biol (2022) 225 (23): jeb245088.
Published: 9 December 2022
... cells, which act as lactate sensors. Lactate O 2 chemoreceptors Fish gill Hypercapnia L-type Ca 2+ channels Monocarboxylic acid transporter Natural Sciences and Engineering Research Council of Canada http://dx.doi.org/10.13039/501100000038 NSERC http://dx.doi.org...
Journal Articles
J Exp Biol (2022) 225 (2): jeb242735.
Published: 26 January 2022
... attributed. Summary: European sea bass exposed to 1 kPa (10,000 µatm) CO 2 regulate blood and red cell pH within 2 h and 40 min, respectively, protecting O 2 transport capacity, via enhanced gill acid excretion. Hypercapnia Ionocytes Respiratory acidosis O 2 transport Gill plasticity...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (8): jeb240804.
Published: 16 April 2021
..., hypercapnia and hypoxia. A selective OX 1 R antagonist (SB-334867; 5–25 µmol l −1 ) or agonist (ORX-A; 200 nmol l −1 to 1 µmol l −1 ) was added to the superfusion media. Experiments were performed under basal conditions (media equilibrated with 98.2% O 2 and 1.8% CO 2 ), hypercapnia (5% CO 2 ) or hypoxia (5–7...
Journal Articles
J Exp Biol (2020) 223 (5): jeb212928.
Published: 12 March 2020
... + -ATPase. Although there were slight differences among the three knockdown/knockout experiments, the typical response was a greater degree of intracellular acidification during CO 2 exposure and a reduced capacity to restore pHi to baseline levels post-hypercapnia. The metabolic alkalosis and subsequent...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (8): jeb195388.
Published: 26 April 2019
... rhythm by isolating the thoracic ganglia and perfusing its main tracheae with various respiratory gas mixtures. Fictive ventilation activity was recorded from motor nerves controlling spiracular and abdominal ventilatory muscles. Both hypoxia and hypercapnia increased the ventilation rate...
Journal Articles
J Exp Biol (2018) 221 (21): jeb184473.
Published: 31 October 2018
... critical swimming speed ( U crit ) did not reveal any clear trend with temperature. Hypercapnia evoked an increase in MMR (and thereby AS ex ). However, swimming performance (both U gait and U crit ) was impaired under elevated near-future P CO 2 conditions, indicating reduced efficiencies of oxygen...
Journal Articles
J Exp Biol (2018) 221 (19): jeb187443.
Published: 10 October 2018
... will impair blood oxygen supply in active squid. A decrease in blood pH increases P 50 according to Eqn 3: (3) Acid–base balance Blood–O 2 binding Hypercapnia Cephalopod Hypoxia tolerance Dosidicus Atmospheric carbon dioxide (CO 2 ) partial pressure ( P CO 2 ) has increased...
Includes: Supplementary data
Journal Articles
J Exp Biol (2017) 220 (21): 3939–3948.
Published: 1 November 2017
... and poikilothermy, and extreme tolerance of hypoxia and hypercapnia. With little information available on adjustments in haemoglobin (Hb) function that may mitigate the impact of exogenous and endogenous constraints on the uptake and internal transport of O 2 , we measured haematological characteristics, as well...
Includes: Supplementary data
Journal Articles
J Exp Biol (2017) 220 (5): 765–774.
Published: 1 March 2017
... gigas): implications for thermal limits and induction of thermal tolerance . Biol. Bull.   205 , 160 - 169 . 10.2307/1543236 Hammer , K. M. , Kristiansen , E. and Zachariassen , K. E. ( 2011 ). Physiological effects of hypercapnia in the deep-sea bivalve Acesta excavata...
Includes: Supplementary data
Journal Articles
J Exp Biol (2016) 219 (23): 3810–3821.
Published: 1 December 2016
...Christian Lind Malte; Hans Malte; Tobias Wang ABSTRACT Animals with intermittent lung ventilation and those exposed to hypoxia and hypercapnia will experience fluctuations in the bodily O 2 and CO 2 stores, but the magnitude and duration of these changes are not well understood amongst ectotherms...
Includes: Supplementary data
Journal Articles
J Exp Biol (2016) 219 (6): 887–896.
Published: 15 March 2016
... to environmental stressors. (A) The light grey bar represents acclimation to high environmental P CO 2  (hypercapnia, 400 Pa, 7 days, N =6). mRNA expression for high P CO 2  acclimated animals was normalized to the ribosomal gene RbS-3 prior to calculation of relative gene expression changes. (B) The dark...
Journal Articles
J Exp Biol (2015) 218 (9): 1290–1294.
Published: 1 May 2015
... and ion regulation. Therefore, air-breathing fishes are believed to have a low capacity for extracellular pH regulation during a respiratory acidosis. In the present study, we investigated acid–base regulation during hypercapnia in the air-breathing fish Pangasianodon hypophthalmus in normoxic and hypoxic...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (19): 3569–3578.
Published: 1 October 2014
...). Based on pharmacological evidence using β-adrenergic receptor (β-AR) antagonists, and confirmed by β 1 -AR translational gene knockdown using morpholinos, the reflex tachycardia accompanying hypercapnia was probably mediated by the interaction of catecholamines with cardiac β 1 receptors. Because...
Journal Articles
J Exp Biol (2014) 217 (13): 2411–2421.
Published: 1 July 2014
... of the brittlestar Amphiura filiformis during environmental hypercapnia demonstrated that besides hypoxic conditions, increases of environmental P CO 2 are additive to the already high P CO 2 (up to 0.08 kPa) within the burrows. In response to up to 4 weeks exposure to pH 7.3 (0.3 kPa P CO 2 ) and pH 7.0 (0.6 kPa P...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (5): 673–681.
Published: 1 March 2014
... regress postnatally, in parallel with maturation of splanchnic innervation. Here, we review the evidence that neurotransmitters released from the splanchnic nerve during innervation activate signaling cascades that ultimately cause regression of direct AMC chemosensitivity to hypoxia and hypercapnia...
Journal Articles
J Exp Biol (2013) 216 (8): 1405–1411.
Published: 15 April 2013
.... Gattuso   J.-P. , Hansson   L. ), pp. 192 - 209 . Oxford : Oxford University Press . Batterton   C. V. , Cameron   J. N. ( 1978 ). Characteristics of resting ventilation and response to hypoxia, hypercapnia, and emersion in the blue crab Callinectes sapidus . J. Exp. Zool.   203...
Includes: Supplementary data
Journal Articles
J Exp Biol (2013) 216 (2): 171–180.
Published: 15 January 2013
... was estimated as a percentage of resting metabolic rate using hypercapnia to stimulate ventilation at different stages of pregnancy. The energetic cost of breathing in non-pregnant lizards was 19.96±3.85% of resting metabolic rate and increased threefold to 62.80±10.11% during late gestation. This significant...
Journal Articles
J Exp Biol (2012) 215 (5): 845–852.
Published: 1 March 2012
.... * Author for correspondence ( suzy.munns@jcu.edu.au ) 17 11 2011 © 2012. 2012 ventilation breathing pattern oxygen consumption blood gases exercise hypercapnia crocodilian Crocodilians generate subatmospheric pulmonary pressures to inflate their lungs. Unlike mammals...
Journal Articles
J Exp Biol (2012) 215 (1): 29–43.
Published: 1 January 2012
... at current atmospheric P CO2 (∼400 μatm, normocapnia) or P CO2 projected by moderate IPCC scenarios for the year 2100 (∼700–800 μatm, hypercapnia). Exposure of the juvenile oysters to elevated P CO2 and/or low salinity led to a significant increase in mortality, reduction of tissue energy stores (glycogen...