The interplay between individual adaptive life histories and populations dynamics is an important issue in ecology. In this context, we considered a seasonal consumer-resource model with non-overlapping generations. We focused on the consumers decision-making process through which they maximize their reproductive output via a differential investment into foraging for resources or reproducing. Our model takes a semi-discrete form, and is composed of a continuous time within-season part, similar to a dynamic model of energy allocation, and of a discrete time part, depicting the between seasons reproduction and mortality processes. We showed that the optimal foraging-reproduction strategies of the consumers may be ‘determinate ’ or ‘indeterminate ’ depending on the season length. More surprisingly, it depended on the consumers population density as well, with large densities promoting indeterminacy. A bifurcation analysis showed that the long-term dynamics produced by this model were quite rich, ranging from both populations ’ extinction, co-existence at some season-to-season equilibrium or on (quasi)-periodic motions, to initial condition dependent dynamics. Interestingly, we observed that any long-term sustainable situation corresponds to indeterminate consumers ’ strategies. Finally, a comparison with a 1 model involving typical non-optimal consumers highlighted the stabilizing effects of the optimal life histories of the consumers
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