Table 3.

Stable isotope ratios of diet items fed to captive manatees at SeaWorld of Florida

δ 13C (‰)δ 15N (‰)
Diet itemNMean ± s.e.MinimumMaximumMean ± s.e.MinimumMaximum
Romaine lettuce16–27.2±0.7–28.8–25.82.9±2.6–0.18.9
Spinach3–27.2±0.5–27.8–26.71.8±2.1–0.73.0
Monkey chow4–21.2±1.3–23.0–20.12.9±0.92.14.1
Gruel4–20.3±0.6–21.0–19.72.5±0.61.93.2
Fecal material4–27.9±1.6–29.0–25.63.7±1.52.25.2
  • Gruel was composed of romaine lettuce, spinach, monkey chow and water. Fecal material was analyzed because manatees are known to engage in coprophagy