Stock assessment of bigeye tuna in the western and central Pacific Ocean [SA WP04] Shelton Harley, et al.

By: Contributor(s): Material type: ArticleArticleLanguage: ENG Publication details: [Pohnpei, Federated States of Micronesia] Western and Central Pacific Fisheries Commission (WCPFC) 2009Description: iii, 98 p. ill., maps, graphs, tables 30 cmSubject(s): DDC classification:
  • 639.27783
Online resources: Summary: "This paper presents the streamlined 2009 assessment of bigeye tuna in the western and central Pacific Ocean. The primary purpose of this assessment is to allow for an evaluation of the potential benefits of CMM2008-01 using the most recent information4. Consequently, this paper contains less background material and supporting material (e.g. diagnostics) than the 2008 assessment report and interested readers should consult that report if further information is required. Further, we attempted to produce an assessment consistent with the 2008 assessment, with only minor modifications. We do not view this model run (―run 10‖), which is most comparable to the 2008 assessment ―run 4‖, as containing the most plausible set of data and model structure assumptions. Other model runs, which we believe contain more plausible assumptions are also presented. Changes to the data from the 2008 assessment included: updated catch, effort, and size data for 2007 and some limited data for 20085; revisions to recent historical data for some fisheries (e.g. since 2000); an extended purse seine catch history that partially corrects for logsheet reporting bias; new standardised CPUE series for the main longline fisheries based on an improved methodology; exclusion of some historical size data from the Philippines which was ‗contaminated‘ with samples from two different fisheries. Other changes included: an updated version of the MULTIFAN-CL software which had some new features and minor bug fixes; and decreased penalties for effort deviates for all fisheries (i.e. increased c.v.‘s) to make them both more realistic and consistent with approaches used in other Pacific tuna assessments."
Item type: Meeting Paper
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Holdings
Current library Call number Status Date due Barcode
SPC Special Collections SPC 639.277 83 WES 2009 Available

"WCPFC-SC5-2009/SA-WP-4"

Includes bibliographical references (p. 28-30)

"This paper presents the streamlined 2009 assessment of bigeye tuna in the western and central Pacific Ocean. The primary purpose of this assessment is to allow for an evaluation of the potential benefits of CMM2008-01 using the most recent information4. Consequently, this paper contains less background material and supporting material (e.g. diagnostics) than the 2008 assessment report and interested readers should consult that report if further information is required. Further, we attempted to produce an assessment consistent with the 2008 assessment, with only minor modifications. We do not view this model run (―run 10‖), which is most comparable to the 2008 assessment ―run 4‖, as containing the most plausible set of data and model structure assumptions. Other model runs, which we believe contain more plausible assumptions are also presented. Changes to the data from the 2008 assessment included: updated catch, effort, and size data for 2007 and some limited data for 20085; revisions to recent historical data for some fisheries (e.g. since 2000); an extended purse seine catch history that partially corrects for logsheet reporting bias; new standardised CPUE series for the main longline fisheries based on an improved methodology; exclusion of some historical size data from the Philippines which was ‗contaminated‘ with samples from two different fisheries. Other changes included: an updated version of the MULTIFAN-CL software which had some new features and minor bug fixes; and decreased penalties for effort deviates for all fisheries (i.e. increased c.v.‘s) to make them both more realistic and consistent with approaches used in other Pacific tuna assessments."