Trap response and the measurement of effort in the fishery for the western rock lobster [Panulirus longipes cygnus, catchability, Australia]
1979
Morgan, G.R. (Western Australian Marine Research Lab., Waterman)
Factors affecting the catchability of the western rock lobster (Panulirus longipes cygnus) are discussed with particular reference to the vulnerability of the rock lobster to the type of gear used in its capture. This vulnerability varies seasonally as well as being related to the size and sex of the animals. The seasonal changes in vulnerability have been taken into account in calculating annual effective fishing effort values and it is shown that this measure of fishing effort remains in approximately constant proportion to the fishing mortality rate, F, over a wide range of fishing effort values, whereas nominal effort data, uncorrected for vulnerability changes, do not.
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