To understand population-level responses we need to base our understanding on energy utilization by individual organisms and interactions among individuals. To integrate over life histories we will use a model framework referred to as physiologically structured population models. This framework is characterized by an explicit account of individual organisms and incorporates mechanistic representations of how individuals assimilate energy from food for maintenance, reproduction and development and how they engage in ecological interactions (competition for food and predation) depending on body size and condition.
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To resolve consequences of different management scenarios for herring and salmon growth, stock development and bioaccumulation of dioxins, explicitly taking size-dependent species interactions into account.
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