Fig. 2. The relationship between body mass of mammal and bird species and acyl
composition of their skeletal muscle phospholipids. (A) The unsaturation index
for birds and mammals. (B,C) Percentage of total unsaturates (UFA) and
percentage composition of two individual acyl chains, the monounsaturated
oleic acid (18:1 n-9) and the polyunsaturated docosahexaenoic acid (22:6 n-3),
for mammals (B) and birds (C). The mammal data are from Hulbert et al.
(2002c) and the bird data are
from Hulbert et al.
(2002a).