Fisheries Infosite

AEBR 355 Spatial risk assessment for selected shark species in New Zealand – Part II: trawl bycatch

Filename
AEBR-355-2025-Spatial-risk-assessment-for-selected-shark-species-in-New-Zealand-Part-II-trawl-bycatch.pdf

Link to file
AEBR-355-2025-Spatial-risk-assessment-for-selected-shark-species-in-New-Zealand-Part-II-trawl-bycatch.pdf (14.1 MB)

Abstract
This report describes application of a novel risk assessment approach to trawl bycatch (non-target) shark species. The assessment estimated the exploitation rate inflicted on each of twelve species by fishing in the New Zealand Exclusive Economic Zone. Although trawl catches predominated, all relevant fishing methods were included so that the total fisheries impact could be gauged. The exploitation rate is a measure of the proportion of the selected population biomass that is killed as a result of fishing, and includes those individuals that die even when returned to the ocean. The exploitation was compared to a theoretical productivity measure to estimate whether it was high enough to inflict long-term damage on the population. Elephantfish (Callorhinchus milii) and carpet shark (Cephaloscyllium isabellum) were identified as being at higher risk from fishing.

Document date
Tuesday, 6 May 2025
Document type
V 1.3
File format
Adobe PDF
File size
14.1 MB
Reference number

Sort order


Uploaded from
AEBR-355-2025-Spatial-risk-assessment-for-selected-shark-species-in-New-Zealand-Part-II-trawl-bycatch.pdf

Uploaded date
Tuesday, 6 May 2025

Search tags
ISBN: 978-1-991345-68-4;
ISSN: 1179-6480;
AEBR: 355;
AUTHOR: Edwards, C.T.T.;

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.