Trophic structure of the Peruvian marine ecosystem in 2000-2006: Insights on the effects of management scenarios for the hake fishery using the IBM trophic model Osmose
Authored by Yunne-Jai Shin, Arnaud Bertrand, Martin Marzloff, Jorge Tam, Morgane Travers
Date Published: 2009
DOI: 10.1016/j.jmarsys.2008.10.009
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Abstract
The individual-based trophic model Osmose is applied to the upwelling
marine ecosystem off the coast of Peru. The dynamics and life cycle of
eight major species of the Peruvian marine ecosystem are explicitly
considered in the model. Reference simulations provide an overview of
the trophic structure of the Peruvian ecosystem during the period
2000-2006. Results of model calibration and simulations are discussed in
the light of current empirical knowledge on the trophic functioning of
the Peruvian ecosystem and are compared to outputs obtained recently
using the trophic model Ecopath.
The impacts on the ecosystem of restoration plans for the depleted hake
(Merluccius gayi peruanus) population are explored through two
management scenarios: a) a long term reduction of fishing effort
targeting hake and b) a moratorium on the hake fishery. The simulations
help better understand the recent failure of a 20 month hake moratorium
and provide long-term strategic support to ecosystem-based management.
Limits of our approach are discussed and recommendations are detailed
for future developments of the Osmose model and ecosystem approach to
fishery management in the Peruvian context. (c) 2008 Elsevier B.V. All
rights reserved.
Tags
Individual-based model
Dynamics
El-nino
Current system
Reproductive-biology
Humboldt current ecosystem
Exploited ecosystems
Squid dosidicus-gigas
Gulf-of-california
Pleuroncodes-monodon