Table 2.
Estimated model variables for mass-specific total lung capacity (TLC, ml • kg−1), O2 stores (ml • kg−1) of the lung (l-O2), blood (b-O2), and muscle (m-O2), hemoglobin concentration ([Hb], g • dl−1), packed cell volume (PCV, %), myoglobin concentration ([Mb], g Mb • kg−1 muscle).
| Species | TLC | l-O2 | b-O2 | m-O2 | [Hb] | PCV | [Mb] | P50 |
|---|---|---|---|---|---|---|---|---|
| Loggerhead | (113.6 body mass0.923) • body mass−1 | 16.4 | 7.84 | 3.93 | 0.088 | 30 | 2.9* | 25 |
| Leatherback | 64 | 9.25 | 13.8 | 4.50 | 0.156 | 39 | 4.9 | 40 |
| Green | 115 | 16.6 | 8.72 | 3.93 | 0.098 | 29 | 2.9 | 47 |
The hemoglobin P50 (mmHg) was selected from measurements in each species, and the Hill coefficient for the O2 dissociation curve was assumed to be 2.8 from measurements in the loggerhead sea turtle (Wood et al., 1984). (Berkson, 1967;Lapennas and Lutz, 1982;Lutz and Bentley, 1985;Lutcavage et al., 1990;Lutcavage and Lutz, 1991;Hochscheid et al., 2007).
*
No data so assumed equal to another species.