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Estimating natural and fishing mortality and tag reporting rate of southern rock lobster (Jasus edwardsii) from a multiyear tagging model
Frusher, SD and Hoenig, JM (2001) Estimating natural and fishing mortality and tag reporting rate of southern rock lobster (Jasus edwardsii) from a multiyear tagging model. Canadian Journal of Fisheries and Aquatic Sciences, 58 (12). pp. 2490-2501. ISSN 0706-652X
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Fishing and natural mortality rates and tag reporting rate for rock lobsters (Jasus edwardsii) in northwest Tasmania, Australia, were estimated using multiyear tagging models. These estimates are necessary for assessment of the resource. Several models were examined that had either two or three tagging events each year, and either combined sexes or kept sexes separate. The model that best described the dynamics of the fishery utilized three tagging events within a year. The year was divided into discrete periods and, within each year, fishing effort and duration of period were used to apportion fishing and natural mortalities, respectively, to the periods. The separation of fishing mortalities by sex was not found to improve the models. Although high (1.0-1.2.year-), the instantaneous fishing mortality estimates were comparable to estimates obtained from other methods and the relative standard errors were low. Reporting rate estimates were also precise and indicated a lack of participation by the fishing industry. Estimates of natural mortality were low (0.00-0.02.year-) but imprecise.
|Journal or Publication Title:||Canadian Journal of Fisheries and Aquatic Sciences|
|Page Range:||pp. 2490-2501|
|Identification Number - DOI:||10.1139/cjfas-58-12-2490|
|Additional Information:||© 2001 NRC Canada|
|Date Deposited:||29 May 2008 17:29|
|Last Modified:||18 Nov 2014 03:41|
|Item Statistics:||View statistics for this item|
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