The diagram is to illustrate a mathematical model of the Eastern Australian king prawn fishery. Juvenile prawns leave estuaries and migrate northwards along the coast. During their journey they are subject to capture by trawlers and to natural mortality. Those that survive to reach the spawning grounds in the north will produce larvae. These larvae are swept southwards, remaining offshore, and then into the estuaries in the south by the Eastern Australian Current. There they
grow to juvenile size before recruiting themselves into the ocean fishery and beginning their migration. My mathematical model treats only the sub-system enclosed within the dashed rectangle. I am a novice at the diagrams. Your constructive comments will be most welcome.
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