GLMM standardised trotline CPUE series for the toothfish resource in the Prince Edward Islands EEZ updated to include data up to the 2022 season

An updated GLMM standardisation of trotline toothfish CPUE data is presented which includes new data for the 2022 “fishing-year”. Vessels with trotline gear stopped operating in the fishery from May 2022. Thus only partial CPUE data are available for the 2022 “fishing-year”. After a marked decrease...

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Bibliographic Details
Main Authors: Anabela Brandao, Doug Butterworth
Format: Report
Language:unknown
Published: 2023
Subjects:
Biological mathematics
Applied statistics
Biostatistics
MARAM
Patagonian toothfish
Dissostichus eleginoides
Prince Edward Islands EEZ
standardised CPUE
catch per unit effort (CPUE)
trotline
general linear mixed models
Patagonian Toothfish
Prince Edward Islands
Online Access:https://doi.org/10.25375/uct.24543715.v1
https://figshare.com/articles/report/GLMM_standardised_trotline_CPUE_series_for_the_toothfish_resource_in_the_Prince_Edward_Islands_EEZ_updated_to_include_data_up_to_the_2022_season/24543715
Description
Summary:An updated GLMM standardisation of trotline toothfish CPUE data is presented which includes new data for the 2022 “fishing-year”. Vessels with trotline gear stopped operating in the fishery from May 2022. Thus only partial CPUE data are available for the 2022 “fishing-year”. After a marked decrease in CPUE from 2015 to 2017, there has been a notable increase in the CPUE indices apart from a decline in the 2020 index. The 2021 index is the highest since 2012 and is close to the larger values estimated for the first three years (2010-2012) of the series. The 2022 index is down compared to the 2021 index, but still higher than the 2020 index.

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