Quantification of changes in recreational catch and effort on inner Shark Bay snapper species following implementation of responsive management measures
Department of Primary Industries and Regional Development (DPIRD) WA
The size of the recreational catch for pink snapper together with information on the stock size from the egg production method (separate study funded by Fisheries WA) is required to estimate the proportion of the stock taken by recreational fishers over a one year period. This important information will be used to assess the sustainability of present levels of recreational fishing and to determine whether on not further management measured are required. The Gascoyne Region Working Group has noted that a major obstacle to the resolution of fishery management and resource sharing issues in the region is the scarcity of data on recreational catches and activity. Additional monitoring beyond the previous creel survey, funded by Fisheries WA, which finished in March 1999 is required to estimate changes to the total catch, catch rates, size composition and mortality of these and other exploited marine species. This information, together with other studies funded by Fisheries WA to estimate the size of the pink snapper stocks, is required to develop strategies for the management of recreational fishing in Shark Bay. An estimate of the recreational catch, fishing effort, catch rates and location caught for black snapper is required for the related FRDC project "The age growth and reproductive biology and stock assessment of black snapper, Lethrinus laticaudis in Shark Bay, WA" (FRDC 99/152).
1. To estimate the proportion of pink snapper stock harvested by recreational fishers using results from this creel survey and the egg production method survey.
2. To provide an estimate of the recreational catch of all species including fish (esp. pink snapper and black snapper), sharks, crustaceans and molluscs in the Shark Bay region.
3. To provide an estimate of the recreational fishing effort in the Shark Bay region.
4. To assess the re-direction of fishing effort after changes to the management regulations.
5. To provide the length frequency of pink snapper, black snapper and other prime species kept by recreational fishers.
Principal Investigator: N.R. Sumner and B.E. Malseed