Updated (and rescaled) Tristan Island GLM-standardised Jasus tristani lobster Powerboat CPUE to take account of data for the 2021 season

The Powerboat CPUE series for Tristan Island was last updated in 2021 (MARAM/Tristan/2020/APR/02) and took data for the 1994-20201 seasons into account. The GLM standardisation incorporated a method whereby the full GLM time series for Tristan Island could be rescaled to take into account the overall fishing efficiency changes as informed by the data on fishermen’s names (available for the 2005-2007 and 2013-2021 seasons only). This document updates this GLM analysis by incorporating data from the most recent 2021 season. An increase in the 2021 CPUE relative to 2020 is evident. The powerboat CPUE for the last two seasons is substantially above the target “Jtar” value.