Model-Based Estimates of Abundance for 11 Species from the NMFS Slope Surveys.

摘要

This analysis was conducted to provide statistically robust fishery independent indices of abundance in support of the 2005 stock assessments for the Dover sole (Microstomus pacificus), shortspine thornyhead (Sebastolobus alascanus), longspine thornyhead (S. altivelis), sablefish (Anoplopoma fimbria) (DTS) and other slope groundfish resources on the continental slope of the U.S. West Coast. This work is a direct extension of the analysis by Helser et al. (2004), who developed a generalized linear mixed model (GLMM) analysis of slope DTS species, and that of Dick (2004), who developed a method for discriminating among error models for generalized linear models (GLM). The analyses and results presented in this document respond directly to the above action items. Specifically this analysis applies GLMs and GLMMs to National Marine Fisheries Service (NMFS) trawl survey data, with the specific objectives of examining the AFSC and NWFSC slope survey data for meaningful poststratification scheme, and conducting a GLM based analysis of slope survey data (accounting for spatial/temporal covariates) generating biomass indices and variances for use in stock assessment.