Evaluation of Multiple Survey Indices in Assessment of Black Sea Bass from the U.S. South Atlantic Coast
D.S. Vaughan, B. Zhao, M.R. Collins, J.C. McGovern, and H.S. Meister
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The age structure and status of the U.S. southern Atlantic stock of black sea bass were examined using recorded and estimated landings and size frequencies of fish taken from commercial, recreational, and headboat fisheries during 1979-1995. Fishery independent data were obtained from the Marine Resources Monitoring, Assessment, and Prediction (MARMAP) program for calibrating virtual population analysis (VPA). MARMAP collected black sea bass with four gear types: hook-and-line (1979-1995), blackfish trap (1979-1989), Florida snapper trap (1980-1989), and chevron trap (1988-1995). Reduced effort with the hook and-line gear in 1988 coincided with reduced catch per effort (CPE). The size fraction of fish captured with chevron trap was similar to the Florida snapper trap, but dissimilar to the blackfish trap. Hence, an extended time series of CPE was developed combining the Florida snapper and chevron traps. We examined the effect of different combinations of CPE indices (individually and in combination) on estimates of fully recruited fishing mortality, spawning stock biomass, and spawning potential ratio using the FADAPT VPA approach.
- Item number: AK-SG-98-01f
- Year: 1998
- DOI: https://doi.org/10.4027/fsam.1998.06