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AEBR-323-Habitat-Use-And-Impact-Of-Stressors-On-Blue-Cod-4425-2023.pdf
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AEBR-323-Habitat-Use-And-Impact-Of-Stressors-On-Blue-Cod-4425-2023.pdf (4.5 MB)
Abstract
Changes in blue cod populations off Canterbury and in the Marlborough Sounds has raised concerns about the impact of human stressors on these populations, but the relationship between most stressors and blue cod is unknown.
Information on blue cod abundance was matched with environmental data to understand the habitat characteristics important for blue cod adults and juveniles off three Canterbury sites; Banks Peninsula, Motunau, Kaikōura.
Changes in potential stressors to blue cod habitat were compared with blue cod population status over 20 years at the sites off Canterbury and in the Marlborough Sounds.
Blue cod were associated with areas where the seafloor is rough and complex (e.g., reef systems), where structural habitat was provided by plants and animals, and in areas with higher water clarity and lower temperature.
Blue cod population status was related to stressors from land use (e.g., coastal water quality), and increasing water temperatures in most locations, although the intensity of these stressors has varied substantially over time and among locations.
This information provides guidance on the scale and focus for future research and potential management opportunities to limit these stressors and ensure sustainability of the blue cod fishery.
Document date
Friday, 17 November 2023
Document type
V 1.3
File format
Adobe PDF
File size
4.5 MB
Reference number
323
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Uploaded from
AEBR-323-Habitat-Use-And-Impact-Of-Stressors-On-Blue-Cod-4425-2023.pdf
Uploaded date
Friday, 17 November 2023
Search tags
AEBR:
323;
ISSN:
1179-6480;
ISBN:
978-1-991120-23-6;
AUTHOR:
Brough, T.E.;
Leunissen, E.M.;
Beentjes, M.;
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