  In this paper, we investigate the conservation laws of different type of
particles in theories with a universal gravity/matter coupling. The result
brings new insights about previous studies on universal gravity/matter
theories. Especially, the paper demonstrates that for perfect fluids, there is
an equivalence between the assumption $\L_m=-\epsilon$, where $\epsilon$ is the
total energy density; and the assumption that the matter fluid current is
conserved ($\nabla_\sigma (\rho u^\sigma)=0$, where $\rho$ is the rest mass
density). However, the main result is given in the general case where one does
not make any assumption on the conservation of the matter fluid current.
