We use stochastic dynamics to develop the patterned attractor of a non-local extended system. This is done analytically using the stochastic path perturbation approach scheme, where a theory of perturbation in the small noise parameter is introduced to analyze the random escape of the stochastic field from the unstable state. Emphasis is placed on the specific mode selection that these types of systems exhibit. Concerning the stochastic propagation of the front we have carried out Monte Carlo simulations which coincide with our theoretical predictions.
 V. Volterra, Variazioni e fluttuazioni del numero d’individui in specie animali conciventi (Variations and fluctuations of the number of individuals in animal species living together), Memoria della R. Accademia Nazionale dei Lincei, Ser. VI 2, 31–113. [Translated in Chapman, R. 1931 Animal ecology, pp. 409–448. NY: McGraw Hill] (1926)
 J. D. Murray, Mathematical Biology, Vol. 1, Third Edition, (Barcelona, Springer, Berlin, 2007)
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