Lipid assimilation in animals is a major agronomic challenge. Furthermore, the human associated lipid diseases (e.g. obesity) is an important public health concern in industrialized countries. Lipid metabolism relies on some genetic factors which are mostly conserved among species. Thus, it is necessary to qualify and to quantify the differences and the similarities to compare the lipid metabolism between species.Lipid assimilation in animals is a major agronomic challenge. Furthermore, the human associated lipid diseases (e.g. obesity) is an important public health concern in industrialized countries. Lipid metabolism relies on some genetic factors which are mostly conserved among species. Thus, it is necessary to qualify and to quantify the differences and the similarities to compare the lipid metabolism between species.