Program(s) in charge: Ecosystem & Bycatch Program
Click to see projects by theme, goal or target:
- To use presence-only catch data to develop habitat models for all bycatch species caught in EPO tuna fisheries to facilitate mapping of their geographic range.
- To make distribution maps available in a format suitable for use as base maps for ecological risk assessment models (PSA, EASI-Fish)
- Many bycatch species caught in EPO tuna fisheries lack sufficient biological and catch data to undertake traditional stock assessment to determine their vulnerability to fishing.
- Data-limited Ecological Risk Assessment (ERA) methods are now increasingly used to determine the most vulnerable species to fishing, which have a strong reliance on estimating impacts using the overlap of fishing effort with a species’ distribution.
- Given the success of using the EASI-Fish approach for assessing the vulnerability of data-poor bycatch species in the EPO (e.g. sharks, devil rays, leatherback turtles), further development of SDMs for other species is required.
- Relevance for management
- Developing habitat models for bycatch species will improve the fishing mortality estimates using ERAs, from which their status can be determined and guide managers.
- 24 months
- Workplan and status
- Jun-Dec 18: model development using data-rich species
- Jan-Feb 19: apply habitat model to bycatch species
- Mar-April 19: Finalize habitat maps for bycatch species
- May 19: present final model and assessment results at SAC-10.
- Jun 21-Sept 22: use Pacific-wide datasets to explore the use of a range of alternative SDMs in isolation or as ensembles for shark species caught in EPO pelagic fisheries
- External collaborators
- CPCs, SPC
- Presentations at SAC-10, SAC-13 and at WCPFC, if required.
- Procedure, if successful, to be used annually within ERA models to assess the vulnerability of bycatch species in the EPO.