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Keywords: Critical oxygen tension
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Journal Articles
J Exp Biol (2021) 224 (3): jeb232512.
Published: 04 February 2021
... important in maintaining performance in a warmer, hypoxic world. Dissolved oxygen Critical oxygen tension Thermal acclimation OCLTT Climate change Metabolic rate Oxygen is essential to almost all animal life to support aerobic metabolism and meet the energetic costs of living ( Semenza...
Journal Articles
J Exp Biol (2019) 222 (22): jeb203646.
Published: 13 November 2019
.... Critical oxygen tension Fish Hypoxia P crit Respirometry Standard metabolic rate Innumerable studies of fishes have measured their metabolic rate – expressed as O 2 uptake rate ( Ṁ O 2 ; on the assumption that there is no significant anaerobic metabolism when O 2 is readily available...
Journal Articles
J Exp Biol (2019) 222 (18): jeb210633.
Published: 26 September 2019
...Jessica E. Reemeyer; Bernard B. Rees ABSTRACT The critical oxygen tension ( P crit ) for fishes is the oxygen level below which the rate of oxygen consumption ( Ṁ O 2 ) becomes dependent upon ambient oxygen partial pressure ( P O 2 ). We compare multiple curve-fitting approaches to estimate P crit...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (22): jeb163717.
Published: 12 November 2018
... Biologists Ltd 2018 Summary: This Commentary argues that the concept of the critical oxygen tension in water-breathers is fundamentally flawed for many reasons, and it presents the case for more useful alternatives. Critical oxygen tension Standard metabolic rate Routine metabolic rate...
Journal Articles
J Exp Biol (2018) 221 (8): jeb168039.
Published: 13 April 2018
... http://www.biologists.com/user-licence-1-1/ Summary: Amphibious fishes may respond to hypoxic water by escaping and breathing air, rather than improving aquatic respiratory function, in contrast to typical water-breathing species. Interlamellar cell mass Metabolic rate Critical oxygen...
Includes: Supplementary data
Journal Articles
J Exp Biol (2017) 220 (4): 564–572.
Published: 15 February 2017
... rate even in severe hypoxia. Calorespirometry Critical oxygen tension Environmental hypoxia Fish Metabolic depression Metabolic heat Aerobic pathways of ATP production yield ∼15 times more ATP than anaerobic pathways ( Hochachka and Somero, 2002 ). Consequently, environmental hypoxia...
Journal Articles
J Exp Biol (2016) 219 (21): 3376–3383.
Published: 01 November 2016
... Chabot, 2016 ; Claireaux et al., 2000 ; Farrell and Richards, 2009 ; Fry, 1971 ; Lefrançois and Claireaux, 2003 ). We then defined CT max at water oxygen levels ranging from air saturation (normoxia) to below the fish's critical oxygen tension ( P crit ). In determining CT max , we employed a 2°C h...
Journal Articles
J Exp Biol (2016) 219 (4): 474–484.
Published: 15 February 2016
.... heteroclitus macrolepidotus , measured both as critical oxygen tension ( P crit ) and as time to LOE hyp . Warm acclimation offset the negative effects of temperature on time to LOE hyp to a similar extent in the two subspecies. Warm acclimation increased total lamellar surface area of the gill in both...
Journal Articles
J Exp Biol (2014) 217 (24): 4387–4398.
Published: 15 December 2014
... (19.8 kPa P O 2 ) and hypoxia (2.5 kPa), with and without access to air; partitioning of standard in normoxia and hypoxia; maximum and partitioning after exercise; and critical oxygen tension ( P crit ). Additionally, the effects of temperature acclimation on haematocrit, haemoglobin oxygen affinity and...
Includes: Supplementary data
Journal Articles
J Exp Biol (2013) 216 (24): 4590–4600.
Published: 15 December 2013
... differences, whereas fasting improved hypoxia resistance and critical oxygen tensions ( P crit ) lowered from 54 Torr in fed fish to 34 Torr when fasting. In fed fish, hypoxia reduced liver lipid stores by approximately 50% and total liver energy content by 30%. Fasted fish had a 50% lower hepatosomatic index...
Journal Articles
J Exp Biol (2009) 212 (19): 3132–3141.
Published: 01 October 2009
... to repeated short bouts of anoxia was the same as flies exposed to a single anoxia exposure. wvanvoor@nmsu.edu 18 6 2009 2009 metabolic rate reperfusion injury critical oxygen tension hypoxic response hyperoxia Understanding how organisms respond to, and tolerate...
Journal Articles
J Exp Biol (2008) 211 (10): 1535–1540.
Published: 15 May 2008
... O 2 consumption rates( V̇ O 2 ) of eggs at varying P O 2 to determine their critical oxygen tension (i.e. the minimal P O 2 that supports normal respiratory gas exchange) and to predict the impact that naturally brooded intra-clutch P O 2 has on embryonic metabolism. At all three stages of...
Journal Articles
J Exp Biol (1987) 130 (1): 368–387.
Published: 01 July 1987
... pressure (P O O2 ) the oxygen consumption was maintained down to a critical oxygen tension, P c , of approximately 43 Torr (1 Torr = 133.3 Pa). Ventilatory frequency increased progressively while heart rate remained constant until the P O O2 was reduced below 16 Torr. During hyperoxic exposure (P O O2...