... morhua ) and short-horned sculpin ( Myoxocephalus scorpius ), species with blood glucose levels of 3.7 and 0.57 mmol l −1 , respectively. Glucose metabolism was assessed by the production of 3 H 2 O from [2- 3 H]glucose. Glucose metabolism was 3.5- to 6-fold higher by myocytes from Atlantic cod than...

... ( Tautogolabrus adspersus ) and short-horned sculpin ( Myoxocephalus scorpius ) had plasma glucose levels of 4, 4.1, 1.95 and 0.73 mmol l −1 , respectively. Glucose uptake by isolated RBCs was measured by the initial incorporation of [6- 14 C]-glucose and steady-state glucose metabolism was determined...

... was measured in heart and brain tissue from short-horned sculpin Myoxocephalus scorpius L. exposed to acute hypoxia and to graded hypoxia and reoxygenation at 8°C. Cardiorespiratory parameters were recorded along with plasma lactate, K + ,Ca 2+ and Na + levels and their relationship to adenosine levels...

... sensitive measure of recovery from disturbance than f H alone. * Author for correspondence (e-mail: [email protected] ) 4 11 2003 © The Company of Biologists Limited 2004 2004 oxygen consumption teleost fish Myoxocephalus scorpius electrocardiogram heart rate variability...

...Rob S. James; Nicholas J. Cole; Melissa L. F. Davies; Ian A. Johnston ABSTRACT Contractile properties were determined for fast muscle fibres from short-horn sculpin ( Myoxocephalus scorpius L.) ranging from 5 to 35 cm total body length ( L ) and from 2.0 to 758 g body mass. Maximum unloaded...

...Rob S. James; Ian A. Johnston ABSTRACT Fast-starts associated with escape responses were studied in short-horn sculpin ( Myoxocephalus scorpius L.), ranging from 5.5 to 32 cm in total length ( L ). Electromyography and sonomicrometry were used simultaneously to measure muscle activation and length...

... responses were constant through development. The species studied were the short-horn sculpin ( Myoxocephalus scorpius L.) and the long-spined sea scorpion ( Taurulus bubalis Euphr.). Fast-start escape performance was measured as a proxy of fitness, and maximum body-length-specific speed ( Û max...

...Helga Guderley; Ian A. Johnston ABSTRACT Short-horned sculpin Myoxocephalus scorpius were acclimated to 5 and 15 °C to evaluate the impact of thermal acclimation upon maximal rates of substrate oxidation by mitochondria and upon the thermal sensitivity of their ADP affinity. Cold acclimation...

...Derek Ball; Ian A. Johnston ABSTRACT Single fibres were isolated from the fast myotomal muscle of the short-horned sculpin ( Myoxocephalus scorpius L.). Fish were acclimated to either 5 °C (10 h:14 h light:dark) or 15 °C (12 h:12 h light:dark) for 1–2 months. Isometric tension ( F max...

...Ian A. Johnston; Johan L. Van Leeuwen; Melissa L. F. Davies; Toni Beddow ABSTRACT Short-horned sculpin ( Myoxocephalus scorpius L.) were acclimated for 6–8 weeks to either 5#x00B0;C or 15#x00B0;C (12 h dark: 12 h light). Fast-starts elicited by prey capture were filmed from above in silhouette...

...Toni A. Beddow; Ian A. Johnston ABSTRACT Live fibre bundles were isolated from the fast myotomal muscle of short-horned sculpin (Myoxocephalus scorpius L.) and isometric contractile properties and the force-velocity (P-V) relationship determined at 5, 10 and 15 °C. Experiments were carried out...

...Toni A. Beddow; Johan L. Van Leeuwen; Ian A. Johnston ABSTRACT The swimming kinematics of prey capture was studied in short-horned sculpin (Myoxocephalus scorpius L.) acclimated for 6–8 weeks to either 5 °C or 15 °C (12h:12h light:dark) using 15 °C-acclimated shrimps as prey. Fish acclimated to 5...

... measured from species living at other temperatures: Notothenia coriiceps from Antarctica (-1.5 to +1°C); summer-caught Myoxocephalus scorpius from the North Sea (10–15°C); and Oreochromis andersoni from African lakes and rivers (22–30°C). State 3 respiration rates had Q 10 values in the range 1.8–2.7...

...Ian A. Johnston; Craig E. Franklin; Timothy P. Johnson ABSTRACT Muscle action during swimming and the contractile properties of isolated muscle fibres were studied in the short-horned sculpin Myoxocephalus scorpius at 5 ° C. Semi-steady swimming, startle responses and prey-capture events were...

...Timothy P. Johnson; Ian A. Johnston ABSTRACT Fast muscle fibres were isolated from the abdominal myotomes of the short-horned sculpin Myoxocephalus scorpius L. Sinusoidal length changes were imposed about resting muscle length and fibres were stimulated at a selected phase during the strain cycle...