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PPuurrppoossee
To give participants an overview and basic knowledge of the Ecopath with Ecosim
approach and software;
To present methods, capabilities and limitations of the approach and software;
To explore oceanic ecosystem models and test the effect of fishing on food web structure.
W
Woorrkksshhoopp FFoorrm
maatt aanndd TTooppiiccss Marine ecosystem management is being touted today as a
means of maintaining both sustainable fisheries and healthy ecosystems. In reality, marine
resource conservation and management entail identifying multiple objectives and require that
we make strict trade-offs among disparate fishery, conservation, social, and economic
considerations. Adopting ecosystem-based management principles involves specification of
additional constraints as elements in fishery management policies to preserve biodiversity,
habitat integrity, and trophic structure. It will require the development of reference points in
an ecosystem rather than a single-species context to define targets and limits to exploitation.
Ecosystem management will also entail spatially explicit management strategies to address
protection of habitat, conservation of vulnerable nontarget species, and other conservation
concerns. Ecopath/Ecosim/Ecospace modeling provides a potentially powerful tool for
managing the marine environment for long-term sustainability.
PPrreesseenntteerr Lyne Morissette is a PhD candidate in Zoology at the University of British
Columbia, Vancouver. She earned her Ecology and Environment masters degree from the
Université de Montréal in 1998. Under the supervision of world renowned ecologist Dr. Daniel
Pauly from the Fisheries Centre, and Martin Castonguay from the Maurice-Lamontagne
Institute, her PhD research involves analyzing the quality, the complexity, and the stability of
marine ecosystem models of world oceans, and developing specific ecosystem models for the
Gulf of St. Lawrence (eastern Canada). She is also an ecosystem modeler for the research
program "Comparative Dynamics of Exploited Ecosystems in the Northwest Atlantic" (CDEENA)
as, and contributes to the Sea Around Us Project , validating the published Ecopath models and
completing the database.
M
Maatteerriiaallss
Manuscript: Christensen, Walters and Pauly: Ecopath with Ecosim: A User's Guide. Available for
download from http://www.ecopath.org/publicat/EwE User Guide3.pdf;
Complementary lecture: Pauly, Christensen and Walters. Ecopath, Ecosim and Ecospace as
tools for evaluating ecosystem impact of fisheries; available for download from
http://www.ecopath.org/publicat/pauly072.pdf;
Complementary lecture: Christensen and Walters. Ecopath with Ecosim: methods, capabilities
and limitations; available for download from http://www.ecopath.org/publicat/EwE
Methods.pdf;
Software: Ecopath with Ecosim 5.0: Beta version available free-of-charge from
www.ecopath.org will be used.