Effects of glucose (5 mmol l−1) on the performance of rainbow trout ventricle strips at 0.5 Hz
| . | Glucose-free . | . | . | 5 mmol l−1 glucose . | . | . | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Variables . | Maturing males . | Immature males . | Immature females . | Maturing males . | Immature males . | Immature females . | ||||
| F (g) | ||||||||||
| Initial | 0.52±0.07 | 0.55±0.04 | 0.51±0.05 | 0.47±0.05 | 0.48±0.06 | 0.49±0.07 | ||||
| Final | 0.62±0.05 | 0.64±0.07 | 0.58±0.05 | 0.72±0.03* | 0.65±0.01* | 0.61±0.03* | ||||
| tp (ms) | 390±4 | 360±4 | 310±3* | 410±3 | 380±3 | 360±4 | ||||
| t0.8r (ms) | 350±3† | 370±4† | 420±4† | 300±2 | 330±3 | 320±3 | ||||
| . | Glucose-free . | . | . | 5 mmol l−1 glucose . | . | . | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Variables . | Maturing males . | Immature males . | Immature females . | Maturing males . | Immature males . | Immature females . | ||||
| F (g) | ||||||||||
| Initial | 0.52±0.07 | 0.55±0.04 | 0.51±0.05 | 0.47±0.05 | 0.48±0.06 | 0.49±0.07 | ||||
| Final | 0.62±0.05 | 0.64±0.07 | 0.58±0.05 | 0.72±0.03* | 0.65±0.01* | 0.61±0.03* | ||||
| tp (ms) | 390±4 | 360±4 | 310±3* | 410±3 | 380±3 | 360±4 | ||||
| t0.8r (ms) | 350±3† | 370±4† | 420±4† | 300±2 | 330±3 | 320±3 | ||||
Values are means ± s.e.m. Maturing males (N=26), immature males (N=24), immature females (N=21). F, twitch force; initial values reflect the end of 60 min equilibration, and final values were taken at the end of experiments (percentage changes are shown in Fig. 3). tp, time from stimulus to peak twitch force; t0.8r, time from peak twitch force to 80% relaxation. *P<0.05, 5 mmol l−1 glucose versus glucose-free (final minus initial values). †P<0.05, glucose-free versus glucose for a given group.