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Keywords: haemoglobin
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Journal Articles
J Exp Biol (2020) 223 (5): jeb211250.
Published: 11 March 2020
... consumption rate, blood O 2 saturation, haematocrit (Hct) and blood haemoglobin (Hb) concentration. We calculated O 2 pulse (the product of stroke volume and the arterial–venous O 2 content difference), blood O 2 concentration and heart rate variability. Regardless of altitude, all eight populations...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (11): jeb191916.
Published: 13 June 2019
... in the eastern Beaufort Sea. Muscle myoglobin concentrations averaged 77.9 mg g −1 , one of the highest values reported among mammals. Importantly, blood haematocrit, haemoglobin and muscle myoglobin concentrations correlated positively to indices of body condition, including maximum half-girth to length ratios...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (7): jeb198622.
Published: 1 April 2019
... compared with their close relatives. This finding suggests that improvements in S aO 2 in hypoxia can require increases in both breathing and haemoglobin–O 2 affinity, because the yellow-billed pintail was the only high-altitude duck with concurrent increases in both traits compared with its low-altitude...
Journal Articles
J Exp Biol (2017) 220 (21): 4060–4067.
Published: 1 November 2017
..., the European starling ( Sturnus vulgaris ). We show that changes in haematocrit, body mass and wing length are independent of year and brood quality, while changes in haemoglobin concentration are higher in low-quality broods. Moreover, we also identify higher oxidative stress in low-quality year and second...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (9): 1430–1436.
Published: 1 May 2014
... Haemoglobin pH optode Octopus Amphipod Antarctic fish Since the first oxygen binding experiments by Paul Bert ( Bert, 1878 ) and Carl Gustav von Hüfner ( Hüfner, 1890 ) and the pioneering work by Bohr, Hasselbalch and Krogh ( Bohr et al., 1904 ) dating back more than a century, oxygen binding...
Includes: Supplementary data
Journal Articles
J Exp Biol (2013) 216 (3): 369–378.
Published: 1 February 2013
... and potential interactions upon exposure to a progressive low-O 2 stimulus preconditioning Sparidae oxygen affinity metabolism swimming activity haemoglobin mitochondria respiration The prevalence of low oxygen (environmental hypoxia) has increased in coastal regions ( Diaz...
Journal Articles
J Exp Biol (2012) 215 (15): 2560–2566.
Published: 1 August 2012
... found for other vertebrates, despite very high measured thiol content. Fe-nitrosyl and N- nitroso compounds were present at high micromolar levels under normoxia and increased further after anoxia and reoxygenation, suggesting NO generation from nitrite catalysed by deoxygenated haemoglobin, which...
Journal Articles
J Exp Biol (2012) 215 (1): 93–102.
Published: 1 January 2012
... sharks had a consistently higher and C a O 2 than shovelnose rays, probably due to their significantly greater in vivo haemoglobin (Hb)–O 2 binding affinity ( in vivo Hb–O 2 P 50 =4.27±0.57 kPa for epaulette sharks vs 6.35±0.34 kPa for shovelnose rays). However, at P w O 2 values representing the same...
Journal Articles
J Exp Biol (2011) 214 (17): 2927–2934.
Published: 1 September 2011
... . Janssen G. J. A. , Jerrett A. R. , Black S. E. , Forster M. E. ( 2010 ). The effects of progressive hypoxia and re-oxygenation on cardiac function, white muscle perfusion and haemoglobin saturation in anaesthetised snapper (Pagrus auratus) . J. Comp. Physiol. B 180 , 503 - 510...
Journal Articles
J Exp Biol (2011) 214 (14): 2319–2328.
Published: 15 July 2011
... haemoglobin βNHE oxygen delivery carbonic anhydrase catecholamine isoproterenol short-circuiting A reduction in blood pH during blood capillary transit enhances O 2 delivery in vertebrates through the Bohr effect, a physiological mechanism that has been studied extensively for over a century...
Journal Articles
J Exp Biol (2010) 213 (3): 408–417.
Published: 1 February 2010
...S. Moenickes; O. Richter; R. Pirow SUMMARY The planktonic crustacean Daphnia magna synthesizes haemoglobin (Hb) macromolecules of variant subunit composition and oxygen affinity. This is one of the strategies by which the animals cope with variations in environmental conditions such as ambient...
Journal Articles
J Exp Biol (2008) 211 (24): 3790–3799.
Published: 15 December 2008
... in their ventral air-stores, but rapidly enter a protracted period of near-neutral buoyancy before becoming negatively buoyant. This dive profile is due to haemoglobin found in large tracheated cells in the abdomen. Fibre optic oxygen probes placed in the air-stores of submerged bugs revealed that oxygen partial...
Journal Articles
J Exp Biol (2007) 210 (19): 3451–3460.
Published: 1 October 2007
...Pia Koldkjær; Michael Berenbrink SUMMARY Haemoglobin concentrations in vertebrate red blood cells are so high that in human sickle cell disease a single surface amino acid mutation can result in formation of large insoluble haemoglobin aggregates at low oxygen levels,causing peculiar cell...
Journal Articles
J Exp Biol (2006) 209 (15): 2961–2970.
Published: 1 August 2006
... in both parameters were tightly correlated with O 2 consumption. The haemoglobin (Hb)-oxygen binding curve at 24.0°C showed pronounced downward and rightward shifts compared to 20.0°C and 7.0°C, indicating that both binding capacity and affinity decreased. Further, Hb levels were lower at 24.0°C than...
Journal Articles
J Exp Biol (2005) 208 (19): 3665–3674.
Published: 1 October 2005
... a 400-point adjacent averaging smoothing of the raw data. * Author for correspondence (e-mail: fbj@biology.sdu.dk ) 28 7 2005 © The Company of Biologists Limited 2005 2005 erythrocyte haemoglobin microcirculation nitrite nitric oxide vasodilation The isolated...
Journal Articles
J Exp Biol (2005) 208 (11): 2165–2175.
Published: 1 June 2005
... morpho-physiological parameters relevant in oxygen transport and regulation. Hypoxia acclimation induced adjustments at the haemoglobin (Hb) and metabolic level (within 3 days) but none at the systemic level. The convective performance and oxygen-sensitive control of the ventilatory and circulatory...
Journal Articles
J Exp Biol (2005) 208 (6): 1109–1116.
Published: 15 March 2005
... the respiratory surface area in response to temperature. Rather than being a graded change, the results suggest that the alteration of gill morphology is triggered at a given temperature. Oxygen-binding data reveal very high oxygen affinities of crucian carp haemoglobins, particularly at high pH and low...
Journal Articles
J Exp Biol (2004) 207 (25): 4393–4405.
Published: 1 December 2004
... pressure ( P O 2 )in the haemolymph was measured by phosphorescence lifetime imaging in the P O 2 range 0–6 kPa (0–30% air saturation). There were substantial differences in the shape of the two-dimensional P O 2 profiles depending on the concentration of haemoglobin (Hb) in the haemolymph. A steep global...
Journal Articles
J Exp Biol (2003) 206 (7): 1153–1161.
Published: 1 April 2003
... significant gains in the haematocrit ( P =0.0005) and blood haemoglobin concentration ( P =0.015) of `divers', but not `surface swimmers'. The post-training blood O 2 store calculated for `divers' (22.9 ml O 2 kg –1 ) was nearly 26% higher than that (18.2 ml O 2 kg –1 ) derived for `surface swimmers'( P =0.03...
Journal Articles
J Exp Biol (2003) 206 (2): 359–364.
Published: 15 January 2003
...Maria Faldborg Petersen; John Fleng Steffensen SUMMARY Atlantic cod Gadus morhua has polymorphic haemoglobin, which can be separated into two homozygous types, HbI-1 and HbI-2, and one heterozygous type HbI-1/2. The geographical distribution of Atlantic cod with the different haemoglobin types...