Filename
FAR-2024-14-Commerical-Fisheries-And-Research-Surveys-Hake-And-Ling-Catch-At-Age-202122-4429.pdf
Link to file
FAR-2024-14-Commerical-Fisheries-And-Research-Surveys-Hake-And-Ling-Catch-At-Age-202122-4429.pdf (24.5 MB)
Abstract
This report describes catch-at-age distributions for hake (Merluccius australis) and ling (Genypterus blacodes) from commercial fisheries for the 2021–22 (2022) fishing year, to update an ongoing time series.
These distributions are based on length data and otoliths (ear bones for ageing fish) collected by observers from commercial fishing and research trawl data.
Catch-at-age data are important for the assessment of fish stocks because they provide information on the year class strength of age classes caught and are used in analyses of trawl surveys and commercial fisheries.
The precision target (coefficient of variation) was met for analyses of hake commercial trawl Sub-Antarctic and west coast South Island fisheries but not for the Sub-Antarctic trawl survey. The target precision was met for the Chatham Rise and Sub-Antarctic ling commercial trawl fisheries, and the Sub-Antarctic trawl survey, but not for the west coast South Island commercial trawl fishery. The target precision was met for the west coast South Island and Sub-Antarctic ling longline fisheries analysed.
Further observer data collection in certain areas and months are recommended to improve the precision of the hake and ling time series in future analyses.
Document date
Thursday, 21 March 2024
Document type
V 1.3
File format
Adobe PDF
File size
24.5 MB
Reference number
2024/14
Sort order
Uploaded from
FAR-2024-14-Commerical-Fisheries-And-Research-Surveys-Hake-And-Ling-Catch-At-Age-202122-4429.pdf
Uploaded date
Thursday, 21 March 2024
Search tags
FAR:
2024/14;
ISSN:
1179-5352;
ISBN:
978-1-991285-07-2;
AUTHOR:
Ballara, S.L.;
Barnes, T.C.;
If you are having problems opening this file, you may not have the software on your computer needed to view it. Click the link below to download and install a suitable program.
