Concentrations of Na+, K+and Ca2+present in the nests after spawning
| Time after spawning (min) . | Na+ (mmol 1−1) . | K+ (mmol 1−1) . | Ca2+ (mmol 1−1) . |
|---|---|---|---|
| 0 | 19.38±12.46 (12.9%) | 0.70±0.30 | 1.52±0.89 |
| 5 | 16.78±6.89 (11.2%) | 0.55±0.25 | 1.01±0.31 |
| 15 | 4.78±0.80 (3.2%) | 0.22±0.18 | 0.73±0.09 |
| Ambient water | 1.40±0.85 | 0.11±0.04 | 0.52±0.29 |
| Time after spawning (min) . | Na+ (mmol 1−1) . | K+ (mmol 1−1) . | Ca2+ (mmol 1−1) . |
|---|---|---|---|
| 0 | 19.38±12.46 (12.9%) | 0.70±0.30 | 1.52±0.89 |
| 5 | 16.78±6.89 (11.2%) | 0.55±0.25 | 1.01±0.31 |
| 15 | 4.78±0.80 (3.2%) | 0.22±0.18 | 0.73±0.09 |
| Ambient water | 1.40±0.85 | 0.11±0.04 | 0.52±0.29 |
Values are means ± s.d.; N=5. Na+ concentrations also given as a percentage of the concentration in ovarian fluid. The fish used in experiment were brackish water sticklebacks spawning in freshwater.