Updated GLMM standardised trotline CPUE series for the toothfish resource in the Prince Edward Islands EEZ to include data up to the 2020 season

• Main Authors: Brandao, Anabela, Butterworth, Doug
• Format: Report
• Language: unknown
• Published: University of Cape Town 2021
• Subjects: 10401 Applied Statistics; FOS Mathematics; 10202 Biological Mathematics; 10402 Biostatistics; Prince Edward Islands
• Online Access: https://dx.doi.org/10.25375/uct.16904548.v1; https://zivahub.uct.ac.za/articles/report/Updated_GLMM_standardised_trotline_CPUE_series_for_the_toothfish_resource_in_the_Prince_Edward_Islands_EEZ_to_include_data_up_to_the_2020_season/16904548/1

An updated GLMM standardisation of trotline toothfish CPUE data is presented which includes new data for the 2020 “fishing”-year. After a marked decrease in CPUE from 2015 to 2017, there has been a notable increase in the 2018 index, which is close to the larger values estimated for the first four years (2010-2013) of the series. Since 2018, the indices show a decline, but are still higher than the lowest values of the index for 2016 and 2017.