Fig. 2. Mass-specific metabolic rates of adult female leatherback and green turtles. The field metabolic rates reported in this study for internesting leatherbacks (filled circle) were similar to metabolic rates measured during oviposition, nest construction or restraint for leatherbacks (open squares; Paladino et al., 1990, 1996) and slightly higher than those for green turtles (open inverted triangles; Prange and Jackson, 1976; Jackson, 1985). The FMRs were lower than metabolic rates measured during vigorous nest covering or walking along the beach for green turtles (filled inverted triangles; Prange and Jackson, 1976; Jackson, 1985) and leatherbacks (filled square; Paladino et al., 1990, 1996). Values are means ± 1 S.E.M.; numbers in parentheses indicate sample size.