  We establish the existence of martingale solutions to a class of stochastic
conservation equations. The underlying models correspond to random
perturbations of kinetic models for collective motion such as the Cucker-Smale
and Motsch-Tadmor models. By regularizing the coefficients, we first construct
approximate solutions obtained as the mean-field limit of the corresponding
particle systems. We then establish the compactness in law of this family of
solutions by relying on a stochastic averaging lemma. This extends the results
obtained by Karper, Mellet and Trivisa in the deterministic case.
