註釋 Although the information about the abundance and the distribution of mid-trophic level organisms would have a great interest in the general context of ecological research and multi-species fisheries management, the sampling of mid-trophic level organisms is expensive and biase and such information is not avalaible. For the study of distribution, habitats and foraging ecology of top predators, MTL biomass would be a highly valuable explaining variable. In this context, the modelling of the spatial dynamics of MTL biomass appears to be a useful tool but the quality of predictions can't be easily evaluated. This study aimed at using bio-logging data of Southern elephant seals of the Kerguelen Island to evaluate some key aspects of the modelling approach of SEAPODYM micronekton model. The use of prey catch attempts counting (derived from accelerometry) allowed to validate : the use of the euphotic depth as a way to describe the vertical distribution of the micronekton, the choice of layer's definition and provided encouraging results relatively to the quantitative predictions of micronekton biomass. Then, the predictions of this model were used in parallel with two different proxies of the foraging activity of the Southern elephant seals to investigate the feeding behaviour in an environment charactyerized by th mesoscale activity. 