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A Preliminary Assessment of Increases in Fishing Power On Stock Assessment and Fishing Effort Expended in the Western Rock Lobster (Pajvulirus Cygnus) Fishery

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This study looks at the changes in nominal fishing effort and fishing power that occurred between 1971-72 and 1991-92. It examined the trends in the use of various components of fishing power (e.g., radar, colour echo sounder, global positioning system, pot type) and their effect on catch rates, using a two stage ANOVA/regression approach. This information is then used to standardise the time series of nominal fishing effort to reflect changes in fishing power. The changes in fishing power with respect to months and depth of fishing, and fishing regions, are discussed. The standardised fishing effort is then used in modeling the effect of exploitation on the breeding stock.


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Affiliations: 1: Western Australian Marine Research Laboratories, P.O. Box 20, North Beach, WA 6020, Australia


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