D4.1 Review of Environmental Models - SEAT Global

2.3.2. Example 2: Sea urchin fishery management, Chile
Del Campo Barquin (2002) used GIS coupled with external simulation models that were
produced using Powersim dynamic modelling software to depict spatially the current state
of natural stocks of the red sea urchin Loxechinus albus and other important commercial
benthic resources in a small area of the central coast of Chile. Coupled with data on the
major physical characteristics of the coastal environment, such as bathymetry and seabed
type, models were developed which optimised sites for restocking of hatchery- reared seed
of red sea urchin and which accorded with the aims of the local area management plan (Fig.
2.2). By integrating the biological and socio economic outcomes in an external simulation
model, the ultimate objective of the GIS- based model for restocking and exploitation of the
red sea urchin fishery was achieved.
Figure. 2.2: Suitability of areas for fishery restocking in Quintay bay, Chile. The image shows
environmentally suitable areas for restocking cross-tabulated with existing populations of
keyhole limpet Fisurella sp, the red sea urchin Loxechinus alba and the Chilean abalone
Concholepas concholepas. Dark green = Highly suitable areas for L. Alba restocking. (after del
Campo Barquin, 2002).
Page 29