Table 2:
Plasma Na+, K+, Ca2+ and Cl− concentrations in long-term freshwater (FW)-acclimated sea lampreys challenged in FW (n= 4), 17.5 brackish water (BW-17.5; n = 4) and short-term FW-acclimated sea lampreys challenged in FW (n = 6), BW-17.5 (n = 6), and 25 brackish water ’(BW-25) osmoregulators (n = 14) and BW-25 osmocompromised animals (n = 4)
| FW acclimation | Group | [Na+] | [K+] | [Ca2+] | [Cl−] |
|---|---|---|---|---|---|
| Long term | FW | 137.7 ± 1.1a | 3.2 ± 0.3 | 1.8 ± 0.5a | 96.5 ± 0.8a |
| BW-17.5 | 203.3 ± 1.3b | 3.0 ± 0.4 | 5.8 ± 0.5b | 201.3 ± 6.6b | |
| Short term | FW | 151.3 ± 3.8a | 5.5 ± 0.5a | 2.8 ± 0.3a | 108.1 ± 1.4a |
| BW-17.5 | 189.2 ± 3.9b | 4.0 ± 0.2ab | 4.8 ± 0.1ab | 141.0 ± 5.6b | |
| BW-25 osmoregulating | 195.0 ± 8.6b | 4.6 ± 0.1ab | 4.9 ± 0.3ab | 148.6 ± 6.7b | |
| BW-25 osmocompromised | 288.7 ± 3.7b | 3.3 ± 0.1b | 25.9 ± 2.8b | 275.5 ± 15.7c | |
| FW | 0.5 | 0.1 | 0.6 | 0.1 | |
| BW-17.5 | 237.2 | 5.4 | 4.9 | 286.1 | |
| BW-25 | 350.8 | 7.3 | 8.1 | 421.0 |
Values are shown as means ± SEM. Within each experiment, groups that do not share letters are significantly different (P < 0.05). Corresponding water ion concentrations are also listed.