ABSTRACT
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189 Main Characteristics of the Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190 Main Data Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191 Structure of Basic Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191 Parameter Databases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193 Primary Productivity, Phytoplankton, and Zooplankton . . . . . . . . . . . . . . . . . . . . 195 The Fishery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195 Balancing the Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196 Simulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197 Results and Discussion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
The Australian Great Barrier Reef (GBR) stretches 2000 km along the tropical and sub-tropical east coast of the state of Queensland. This complex of lagoons, coral reefs, shoals, and islands is enclosed in a marine national park which has been designated a multi-use world heritage area. Prior to the declaration of the marine park both commercial trawling and line-fishing were carried out in the inner reef lagoon and inter-reef gutters for penaeid prawns, and on the coral reefs themselves for linecaught species, mainly coral trout. There are currently 650 prawn trawlers and over 1000 line-fishing vessels endorsed to work in the park.
