Estimation of demersal fish food consumption and trophic level for key fish species in the NL marine ecosystem: a proof of concept for developing food web baselines in an ecosystem-based management context

Description

Ecosystem-Based Management (EBM) is an approach to fisheries management that considers the ecosystem as a whole and therefore many objectives at once. EBM requires some trade-offs between priorities, such as those between fisheries that target species linked through predator-prey relationships and other interactions (e.g., in the Newfoundland and Labrador marine ecosystem seals and Atlantic cod or Atlantic cod and shrimp or crab). Assessing these trade-offs is done using models of food webs, which requires a significant amount of data, resources, and time. This project will improve the assessment process by focusing mainly on interactions that exist between key species. It will estimate the quantity of food consumed by bottom-feeding fish in comparison to marine mammals, examine the different categories of prey that are consumed, and assess the position that key species occupy within the food chain.

Program Name

Strategic Program for Ecosystem-based Research and Advice (SPERA)

Ecoregion(s)

Atlantic: Newfoundland, Labrador Shelves

Principal Investigator(s)

Mariano Koen-Alonso

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