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Keywords: Red muscle
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Journal Articles
J Exp Biol (2023) 226 (2): jeb244984.
Published: 30 January 2023
... a 60-day experiment in winter (12°C) or summer (20°C) conditions under natural photoperiod. In addition, we measured mitochondrial respiration of red muscle fibres, biometric variables and energy reserves of individuals sampled at 30 and 60 days. This revealed that winter food deprivation elicits...
Includes: Supplementary data
Journal Articles
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
Journal Articles
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
Journal Articles
Journal Articles
J Exp Biol (2010) 213 (11): 1921–1929.
Published: 1 June 2010
... the series for red fibres and increased for white fibres. † Present address: School of Life Sciences, University of Hertfordshire, College Lane, Hatfield, Hertfordshire AL10 9AB, UK * Author for correspondence ( n.curtin@imperial.ac.uk ) 11 2 2010 © 2010. 2010 red muscle red...
Journal Articles
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...
Journal Articles
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...
Journal Articles
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...
Journal Articles
J Exp Biol (2007) 210 (7): 1194–1203.
Published: 1 April 2007
... and power output. Based on later EMG onset and offset times measured in swimming mako sharks mentioned above, it is hypothesized that red muscle from mako sharks will produce power at greater cycle frequencies than the red muscle of leopard sharks, at a given temperature. Five leopard sharks...
Journal Articles
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...
Journal Articles
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...
Journal Articles
Journal Articles
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...
Journal Articles
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...
Journal Articles
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...
Journal Articles
Journal Articles
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...
Journal Articles
Journal Articles
J Exp Biol (2000) 203 (3): 617–629.
Published: 1 February 2000
...David J. Coughlin ABSTRACT Steady swimming in fishes is powered by the aerobic or red muscle, but there are conflicting theories on the relative roles of the anterior and posterior red muscle in powering steady swimming. To examine how red muscle is used to power steady swimming in rainbow trout...
Journal Articles