Table 1.

Estimated δ¹³C values in penguin tissue with various percentages of four types of prey in their diet

Organic matter	δ13C				% of diet
Rockcod	−18.8 ‰	80	33	30	15	10	10	0
Dragonfish	−24.1 ‰	10	33	30	30	15	10	10
Icefish	−24.1 ‰	10	33	30	30	15	10	10
Krill	−31.4 ‰	0	0	10	25	40	70	80
Penguin tissue		−19.9 ‰	−22.3 ‰	−23.2 ‰	−25.1 ‰	−21.7 ‰	−28.7 ‰	−29.9 ‰