Total nonesterified fatty acids in plasma of the freshwater ocellate river stingray (Potamotrygon motoro), white-edge whip ray (Himantura signifer)in freshwater and half-strength seawater, the marine blue-spotted ribbontail stingray (Taeniura lymma), and the brownbanded bamboo shark (Chiloscyllium punctatum)
| . | Type of water . | N . | Total NEFA (nmol ml-1) . |
|---|---|---|---|
| P. motoro | FW | 7 | 105.7±20.2 |
| H. signifer | FW | 9 | 122.8±40.9 |
| H. signifer | ½ SW | 6 | 154.1±46.0 |
| T. lymma | SW | 4 | 215.7±27.6 |
| C. punctatum | SW | 5 | 171.6±32.0 |
| . | Type of water . | N . | Total NEFA (nmol ml-1) . |
|---|---|---|---|
| P. motoro | FW | 7 | 105.7±20.2 |
| H. signifer | FW | 9 | 122.8±40.9 |
| H. signifer | ½ SW | 6 | 154.1±46.0 |
| T. lymma | SW | 4 | 215.7±27.6 |
| C. punctatum | SW | 5 | 171.6±32.0 |
Values are mean ± s.e.m. FW, freshwater; SW, sea water; ½ SW,half-strength (15‰) seawater.
There were no significant differences between total nonesterified fatty acids (NEFA) concentration in each species (one-way ANOVA, P>0.05)nor between H. signifer (FW) and H. signifer (½ SW)(Student's t-test, P>0.05).