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Keywords: red muscleClose
Elisa Thoral, Elie Farhat, Damien Roussel, Hang Cheng, Ludovic Guillard, Matthew E. Pamenter, Jean-Michel Weber, Loïc Teulier
J Exp Biol (2022) 225 (1): jeb243194.
Published: 6 January 2022
...) and swimming performance [critical swimming speed ( U crit ) and cost of transport (COT)] were assessed. In addition, enzyme activities [citrate synthase (CS), cytochrome c oxidase (COX) and lactate dehydrogenase (LDH)] and mitochondrial respiration were examined in red muscle fibres. We found that acclimation...
Includes: Supplementary data
J Exp Biol (2021) 224 (15): jeb242487.
Published: 5 August 2021
... muscle strips and myocardial trabeculae, and efficiency (net work/energy consumed) was measured for trabeculae, from cold (6°C) and warm (15°C) acclimated fish at temperatures from 2 to 26°C. The mass-specific net power produced by char red muscle was greater than in salmon, by 2-to 5-fold depending...
Includes: Supplementary data
Marie N. Hansen, Jon O. Lundberg, Mariacristina Filice, Angela Fago, Nanna M. G. Christensen, Frank B. Jensen
J Exp Biol (2016) 219 (24): 3875–3883.
Published: 15 December 2016
... Nitrate reduction Nitric oxide Nitrite Red muscle Fig. 6. Nitrate reductase activity in white muscle homogenates. Muscle homogenates are from normoxic (N) and deeply hypoxic (DH) crucian carp. (A–D) Change in nitrite concentration in individual samples during 5 h of N 2 incubation...
J Exp Biol (2010) 213 (11): 1921–1929.
Published: 1 June 2010
... requires that the PA content (or Ca 2+ -binding characteristic by relevant PA isoforms) within red muscle fibres is yet another of the many differences between the elasmobranch used in our experiments, dogfish ( Scyliorhinus canicula L.), and teleost fish; specific evidence about PA in dogfish red fibres...
J Exp Biol (2009) 212 (21): 3564–3575.
Published: 1 November 2009
... in lateral red muscle( b =0.5). Although oxidative enzymes showed negative allometry in red muscle ( b =–0.01 to –0.02), mass-specific myoglobin content scaled positively ( b =0.7). Capillary to fibre ratio of red muscle was higher in larger (1.42±0.15) than smaller (1.20±0.15)fish, suggesting progressive...
J Exp Biol (2008) 211 (10): 1603–1611.
Published: 15 May 2008
... along the body at a relatively high velocity of 1.7 L per tail beat period, and a significant phase shift(31±4°) occurred between muscle shortening and local midline curvature, both suggesting red muscle power is directed posteriorly, rather than causing local body bending, which is a hallmark...
J Exp Biol (2007) 210 (22): 4016–4023.
Published: 15 November 2007
...Leonardo Magnoni; Jean-Michel Weber SUMMARY Fish endurance swimming is primarily powered by lipids supplied to red muscle by the circulation, but the mechanism of delivery remains unknown. By analogy to mammals, previous studies have focused on non-esterified fatty acids (NEFA bound to albumin...
J Exp Biol (2007) 210 (7): 1194–1203.
Published: 1 April 2007
... is nearly double that of the leopard shark,suggesting that the mako may be able to maintain greater aerobic swimming speeds. Animals were killed by severing of the spinal cord. Small blocks of red muscle (RM) were collected from two axial positions (0.4 L anterior and 0.6–0.65 L posterior...
J Exp Biol (2005) 208 (22): 4255–4261.
Published: 15 November 2005
... of RM. However, A. superciliosus and A. pelagicus differ from A. vulpinus in that they do not possess the medial and anterior RM arrangement that would likely facilitate metabolic heat conservation (RM endothermy). Table 1. Shark fork length ( FL ), body mass, red muscle (RM) position,RM cross...
J Exp Biol (2004) 207 (17): 2979–2990.
Published: 1 August 2004
...-coasting began and the activity of pyruvate dehydrogenase (PDH) in red muscle (both caudal and central positions). PDH activity may limit the rate of oxidative ATP production by red muscle. The activity of cytochrome c oxidase in rostral white muscle was the strongest correlate of sprint swimming...
J Exp Biol (2003) 206 (16): 2831–2843.
Published: 15 August 2003
... to the caudal peduncle (85–95% FL ). In the common thresher shark,where the RM extends far into the very long upper caudal fin lobe( Fig. 1 ), sections were extended to 140% FL . Fig. 1. Red muscle (RM) distribution patterns in five shark species. Sharks having a more posterior and lateral RM position...
J Exp Biol (2003) 206 (3): 503–511.
Published: 1 February 2003
... explain such links. The condition factor [(somatic mass × fork length -3 )×100] of starved cod was 0.54±0.1 whereas that of fed cod was 0.81±0.1. In white and red muscle, we measured four glycolytic enzymes: phosphofructokinase (PFK), pyruvate kinase (PK), creatine kinase (CK) and lactate dehydrogenase...
J Exp Biol (2002) 205 (14): 2067–2077.
Published: 15 July 2002
...Jeff G. Richards; Ashley J. Mercado; Cheryl A. Clayton; George J. F. Heigenhauser; Chris M. Wood SUMMARY A biochemical approach was employed to examine the oxidative utilization of carbohydrate and lipid in red muscle of rainbow trout ( Oncorhynchus mykiss ) during sustained swimming at 30 and 60...
J Exp Biol (2002) 205 (11): 1585–1595.
Published: 1 June 2002
...F. Lou; N. A. Curtin; R. C. Woledge SUMMARY Maximum isometric tetanic force produced by bundles of red muscle fibres from dogfish, Scyliorhinus canicula (L.), was 142.4±10.3 kN m -2 ( N =35 fibre bundles); this was significantly less than that produced by white fibres 289.2±8.4 kN m -2 ( N =25...
J Exp Biol (2002) 205 (2): 189–200.
Published: 15 January 2002
...Douglas A. Syme; Robert E. Shadwick SUMMARY The mechanical power output of deep, red muscle from skipjack tuna ( Katsuwonus pelamis ) was studied to investigate (i) whether this muscle generates maximum power during cruise swimming, (ii) how the differences in strain experienced by red muscle...
J Exp Biol (2001) 204 (23): 4043–4054.
Published: 1 December 2001
...Diego Bernal; Chugey Sepulveda; Jeffrey B. Graham SUMMARY The mako shark ( Isurus oxyrinchus ) has specialized vascular networks (retia mirabilia) forming counter-current heat exchangers that allow metabolic heat retention in certain regions of the body, including the aerobic, locomotor red muscle...
J Exp Biol (2001) 204 (13): 2221–2230.
Published: 1 July 2001
... to phases recorded in vivo using electromyography ( Gillis, 1998 ), where EMG activity typically starts between phases of −19% and −3% (i.e. between 20° and 80° in the phase units used by Gillis, 1998 ). Fig.8 A summarizes the values for net work per cycle for all the red muscle preparations. Each...