Filename
FAR-2026-16-Annual-survey-OYU5-Feb-2025.pdf
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FAR-2026-16-Annual-survey-OYU5-Feb-2025.pdf (6.6 MB)
Abstract
•The Foveaux Strait oyster fishery (OYU 5) is a high value, nationally important fishery.•A defining feature of the OYU 5 fishery is the recurrent infection by the parasite Bonamia exitiosa (Bonamia)
•Annual research surveys monitor both oyster abundance within the fishery and the prevalence of Bonamia infection annually.
•A dredge survey was undertaken in February 2025, in collaboration with the Bluff Oyster Management Company Ltd on FV Golden Harvest.
•Oyster densities have declined since 2021.
•In 2025, 1752 oysters were tested from 71 stations, with 20.7% testing positive for Bonamia.
•Disease mortality caused by B. exitiosa is between 12.1 and 12.3%, an increase from 2024 (between 10.2 and 10.6%), and its highest since 2015.
•The increased disease mortality is expected to affect the number of recruited oysters in the population.
Document date
Thursday, 26 March 2026
Document type
V 1.3
File format
Adobe PDF
File size
6.6 MB
Reference number
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Uploaded from
FAR-2026-16-Annual-survey-OYU5-Feb-2025.pdf
Uploaded date
Thursday, 26 March 2026
Search tags
ISSN:
1179-5352;
ISBN:
978-1-997309-37-6;
AUTHOR:
Morrison, M.A.;
Lane, H.S.;
Bian, R.;
Moss, G.;
Brooks, A.;
Smith, L.;
Forman, J.;
FAR:
2026/16;
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