...Glenn J. Lurman; Lene H. Petersen; A. Kurt Gamperl SUMMARY The resting and maximum in situ cardiac performance of Newfoundland Atlantic cod ( Gadus morhua ) acclimated to 10, 4 and 0°C were measured at their respective acclimation temperatures, and when acutely exposed to temperature changes: i.e...

..., the stimulus that triggers the production of sounds in the lobster's natural habitat is not known. We investigated the influence of two fish that are known to prey on lobsters, cod ( Gadus morhua ) and striped bass ( Morone saxatilis ), on the production of sounds by American lobsters. In addition, we examined...

...L. H. Petersen; A. K. Gamperl SUMMARY Recent in vivo experiments on Atlantic cod ( Gadus morhua ) acclimated to chronic hypoxia (6-12 weeks at 10°C; P w O 2 ~8-9 kPa) revealed a considerable decrease in the pumping capacity of the heart. To examine whether this diminished cardiac performance...

...Justin J. Meager; Paolo Domenici; Alex Shingles; Anne Christine Utne-Palm SUMMARY We examined the effect of turbidity (0.5–14 beam attenuation m –1 ) and predator attack speed (150 and 296 cm s –1 ) on escape responses of juvenile cod Gadus morhua in the laboratory. We triggered escape responses...

... to different settings of aerobic capacities in populations of cod ( Gadus morhua ) along a latitudinal cline, maximum activities of key enzymes of mitochondrial metabolism and their respective mRNA levels were compared in white muscle and liver of cold (4°C) and warm (10°C) acclimated individuals from cod...

...Kathy A. Clow; Kenneth J. Rodnick; Tyson J. MacCormack; William R. Driedzic SUMMARY This study investigated the regulation of glucose uptake in Atlantic cod( Gadus morhua ) hearts. Isolated hearts were perfused with or without glucose in the medium, under either normoxic or severely hypoxic...

...Thomas E. Hall; Nicholas J. Cole; Ian A. Johnston SUMMARY Seven cDNA clones coding for different muscle-specific proteins (MSPs) were isolated from the fast muscle tissue of Atlantic cod Gadus morhua L. In situ hybridization using cRNA probes was used to characterize the temporal and spatial...

...Paul W. Webb SUMMARY The kinematics of plaice ( Pleuronectes platessa, L =22.1 cm) and cod ( Gadus morhua, L =25.0 cm, where L is total fish length)swimming at various speeds at the bottom and lifted to heights, h , of 10, 50 and 100 mm by a thin-wire grid were measured. For cod, tailbeat frequency...

...D. M. Webber; R. G. Boutilier; S. R. Kerr; M. J. Smale SUMMARY We report the results of an experiment designed to investigate the feasibility of using differential pressure to estimate the swimming speed and metabolic rate of Atlantic cod ( Gadus morhua ). Seven cod were fitted with a miniature...

...Trina F. Galloway; Elin Kjørsvik; Harald Kryvi ABSTRACT The present study describes the development of the axial musculature in first-feeding larvae of Atlantic cod ( Gadus morhua L.) with different somatic growth rates achieved by using different nutritional conditions. Muscle growth was assessed...

...-illumination microscopy to observe the gill lamellae of anaesthetised Atlantic cod ( Gadus morhua ), we show that ET-1 (100 ng kg −1 , injected into the ventral aorta) causes an increase in pillar cell diameter, consistent with pillar cell contraction, and a shift of intralamellar blood flow from the lamellar...

...Jay A. Nelson; Yong Tang; Robert G. Boutilier ABSTRACT The objective of this study was to determine whether differences in exercise physiology between Atlantic cod ( Gadus morhua ) populations from different salinity environments could be changed by acclimating individuals of each population...

...G. Claireaux; D. M. Webber; S. R. Kerr; R. G. Boutilier ABSTRACT Atlantic cod ( Gadus morhua L.) acclimated to a temperature of 5 °C and 30 ‰ salinity were equipped with ultrasonic transmitters which allowed continuous monitoring of their heart rate and their position in the water column. Fish were...

...G. Claireaux; D. M. Webber; S. R. Kerr; R. G. Boutilier ABSTRACT Atlantic cod ( Gadus morhua L.), acclimated to 5 °C, were equipped with ultrasonic transmitters which allowed the continuous monitoring of their vertical movements and heart rate. Fish were then placed in a 125 m 3 tower tank in which...

...M. Berenbrink; C. R. Bridges ABSTRACT The relationship between intracellular pH (pHi) and extracellular pH (pHe) was investigated in red blood cells from the Atlantic cod ( Gadus morhua ) in carbon dioxide/bicarbonate-buffered salines. In summer animals (August/September), similar transmembrane...

...M. Berenbrink; C. R. Bridges ABSTRACT The effects of catecholamines on the pH and the cellular ion and water content were investigated in red blood cells from the Atlantic cod ( Gadus morhua ). Noradrenaline induced a rapid decrease in the extracellular pH (pHe) of red blood cells suspended in a CO...

...Lena Sundin; Stefan Nilsson ABSTRACT We have estimated the branchial venous blood flow in the Atlantic cod by direct single-crystal Doppler blood flow measurements in vivo . In the undisturbed animal, this flow amounts to 1.7 ml min −1 kg −1 , which corresponds to about 8 % of the cardiac output...

...David J. Grove; Susanne Holmgren ABSTRACT Inflation of the cardiac stomach of the cod induced rhythmic contractions of the muscles and a slow increase in stomach volume towards a maximum. After deflation, the stomach remained relaxed and easily distensible for one or more hours. Section...

... a directional pattern of infrasound in the sea. Using a standing-wave acoustic tube, we have studied the sensitivity of cod to infrasound down to 0·1 Hz by means of the cardiac conditioning technique. The threshold values, measured as particle acceleration, showed a steady decline towards lower frequencies...