Ecopath with Ecosim (EwE) is a free ecological/ecosystem modeling software suite. EwE has three main components: Ecopath - a static, mass-balanced snapshot of the system; Ecosim - a time dynamic simulation module for policy exploration; and Ecospace - a spatial and temporal dynamic module primarily designed for exploring impact and placement of protected areas. The Ecopath software package can be used to

  • Address ecological questions;
  • Evaluate ecosystem effects of fishing;
  • Explore management policy options;
  • Analyze impact and placement of marine protected areas;
  • Predict movement and accumulation of contaminants and tracers (Ecotracer);
  • Model effect of environmental changes;
  • Facilitate end-to-end model construction.

The latest release of Ecopath with Ecosim is version 6.4.3, released in October 2014.

EwE 6.4.4 (19.5MB) - August 2015

This website aims to help you to get the best out of the EwE software and to participate in the EwE community. Create a user account to post and answer questions in the Ecopath user forums. Add and update your EwE-related publications and access papers written by others. Promote and upload your models and download models of others.

User support EwE user manual Forums EwE development/pending issues/
report an issue (email)/
report an issue (direct)