Impact of Diet on Metabolism and Swimming Performance in Juvenile Lake Trout, <i>Salvelinus namaycush</i>

Beamish, F. W. H.; Howlett, J. C.; Medland, T. E.

doi:10.1139/f89-050

Cited by 45 publications

(26 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on results of these experiments, an influx approach was adopted to measure gill [ 3 H]PEG-4000 permeability in non-cannulated, freely swimming trout. Fish were transferred to custom-made 3.2 l Blazka swimming respirometers (Beamish et al, 1989) ]PEG-4000 addition and then at 2 h intervals, with terminal plasma, gut and carcass sampling at 8 h. Ṁ O2 was measured during the first, middle and last hour by stopping aeration, briefly sealing the respirometer, and monitoring the depletion of the partial pressure of oxygen (P O2 ).…”

Section: Methods and Techniquesmentioning

confidence: 99%

Measuring gill paracellular permeability with polyethelene glycol-4000 in freely swimming trout: proof of principle

Robertson

Wood

2014

Journal of Experimental Biology

View full text Add to dashboard Cite

The influence of swimming activity on gill paracellular permeability has not been measured previously in fishes. We critically assessed the use of tritium-labeled polyethylene glycol ([ 3 H]PEG-4000) for this purpose, a substance that is also a classic marker for extracellular fluid volume, glomerular filtration rate and drinking rate. Tests (8 h) on resting freshwater trout showed that when measuring [ 3 H]PEG-4000 clearance from the plasma in the efflux direction, correction for a large excretion via glomerular filtration was essential, necessitating urinary catheterization. When measuring [3 H]PEG-4000 clearance from the water in the influx direction, correction for a significant uptake by drinking was essential, necessitating terminal gut removal, whereas glomerular filtration losses were minimal. After correction for these alternate routes of loss and uptake, [ 3 H]PEG-4000 clearance rates by efflux from the plasma and by influx from the water were identical, showing that gill paracellular permeability is not rectified, and can be measured in either direction. The influx technique with terminal gut removal was used to assess gill paracellular permeability in trout without urinary catheters freely swimming at 1.2 body lengths s −1 for 8 h. Branchial [ 3 H]PEG-4000 clearance rate (by influx from the water) increased significantly by ~80% in accord with a similar measured increase in O 2 consumption rate. Thus in trout, gill paracellular permeability does increase during exercise, in accord with the traditional concept of the osmorespiratory compromise.

show abstract

Section: Methods and Techniquesmentioning

confidence: 99%

Measuring gill paracellular permeability with polyethelene glycol-4000 in freely swimming trout: proof of principle

Robertson

Wood

2014

Journal of Experimental Biology

View full text Add to dashboard Cite

show abstract

“…The respirometers used in this study were Blazkatype swim tunnels (3.37 -0.03 l), similar to those described by Beamish et al (1989). The respirometers were submerged into a temperaturecontrolled water tank (-0.5°C) and were connected to a continuous-flow system, through which oxygenated water flowed at a rate ranging from 20 to 80 ml min )1 depending on the water temperature.…”

Section: Respirometry System and Experimental Protocolmentioning

confidence: 99%

Effect of body mass and water temperature on the standard metabolic rate of juvenile yellow perch, Perca flavescens (Mitchill)

et al. 2006

View full text Add to dashboard Cite

Fish respiration rates that are presumed to represent standard metabolic rates (SMR) may sometimes include an unspecified energy expenditure associated with activity and digestion. This situation may introduce a bias in bioenergetics models because standard metabolism, digestion, and activity may not be affected by the same environmental conditions. The aim of this study was to (1) develop a SMR model for juvenile yellow perch, Perca flavescens (Mitchill), that represent the minimum energy expenditure required to maintain life and (2) compare the results of this study with published perch metabolic rates and bioenergetics models. SMR was estimated for yellow perch over a range of body mass (4.4-24.7 g) and water temperature (12-20°C). The intercept of the relationship between fish respiration and swimming velocity obtained during forced swimming experiments was used to determine SMR. SMR estimated by the present study were comparable to values presented by two published studies on Eurasian perch, Perca fluviatilis L. However, estimated SMR were 4.1-20.9 times lower than values of a third respirometry study and predictions of bioenergetics models for perch. The present study suggests that published SMR models may sometimes include a significant fraction of energy expenditures (39.2-75.9%) associated with digestion and activity. This may complicate the implementation and the interpretation of fish bioenergetics models. The present study indicates that the intercept of respiration-velocity relationships and long-term respiration rates during starvation experiments may provide similar and reliable SMR values.

show abstract

“…Swimming performance is a non-lethal way to assess functional capabilities of fish (see Farrell et al 1998, Jain et al 1998. Graded velocity tests, allowing the determination of critical swimming speed (U crit ), have been well-validated as tests of fish performance (Farlinger & Beamish 1978, Beamish et al 1989, Reidy et al 1995, Jain et al 1997. Indeed, the U crit test has been used to assess a number of health indices (Jain et al 1998, Wagner et al 2003, Tierney & Farrell 2004, Tierney et al 2005, as well as the effects of triploidy (Small & Randall 1989, Stillwell & Benfey 1996, Hyndman et al 2003.…”

Section: Introductionmentioning

confidence: 99%

Effects of skeletal deformities on swimming performance and recovery from exhaustive exercise in triploid Atlantic salmon

Powell¹,

Jones²,

Lijalad³

2009

Dis. Aquat. Org.

View full text Add to dashboard Cite

The occurrence of spinal deformity in aquaculture can be considerable, and a high rate of deformity has been suggested in triploid smolts in Tasmania. However, the physiological performance of fish with skeletal deformities has not been addressed. The swimming performance and oxygen consumption of triploid Atlantic salmon smolts with either a vertebral fusion (platyspondyly) or multifocal scoliosis were compared to normal (non-deformed) triploid smolts. Fish with vertebral fusion attained swim speeds similar to normal fish, whereas scoliotic fish were unable to attain comparable swim speeds. Routine and maximum oxygen consumption was higher for deformed fish compared with normal fish, translating into apparent increased routine metabolic scope in vertebral fusion fish, and equivocal scope in scoliotic fish compared with normal controls. Deformed fish developed a lower excess post-exercise oxygen consumption compared to non-deformed fish, suggesting they are either incapable of sustained anaerobic activity or possess an increased recovery capacity. These data suggest that skeletal deformity has differential effects on swimming performance depending upon the type of deformity but imposes a significant metabolic cost on salmon smolts.

show abstract

Impact of Diet on Metabolism and Swimming Performance in Juvenile Lake Trout, Salvelinus namaycush

Cited by 45 publications

References 0 publications

Measuring gill paracellular permeability with polyethelene glycol-4000 in freely swimming trout: proof of principle

Measuring gill paracellular permeability with polyethelene glycol-4000 in freely swimming trout: proof of principle

Effect of body mass and water temperature on the standard metabolic rate of juvenile yellow perch, Perca flavescens (Mitchill)

Effects of skeletal deformities on swimming performance and recovery from exhaustive exercise in triploid Atlantic salmon

Contact Info

Product

Resources

About