Program(s) in charge: Ecosystem & Bycatch Program
Click to see projects by theme, goal or target:
- Investigate the connectivity among bycatch species caught in the purse-seine fishery and how the structure of these community relationships changes over time and space (if feasible) in the eastern Pacific Ocean (EPO).
- Investigate the vulnerability of those connections and the role of key bycatch species for the community/network
- Ecological risk assessment (ERA) is an approach currently used by IATTC staff to evaluate the ecological impact of tuna fisheries in the EPO
- ERA can also help ensure the long-term sustainability of ‘associated’ and ‘dependent’ species that share the same ecosystem as principal tuna species
- Scientists and managers require novel quantitative methods to reliably identify communities that may include vulnerable species
- Temporal network analysis (TNA) may help identify the communities with vulnerable species and their evolution, and, where appropriate, help prioritize the call for mitigation measures, further detailed analysis, or the prioritization of data collection on potentially vulnerable species
- Relevance for management
- The proposed TNA can support ERA by identifying distinct ecological assemblages within the purse-seine bycatch
- 12 months, extended to 24 months due to COVID-19 pandemic
- Workplan and status
- Understand the network structures that emerge from the recurrences of the relationships among bycatch species and how these networks change through time.
- Detect bycatch communities within networks and key bycatch species as centralized actors of these communities.
- Explore impacts of key bycatch species on their communities through control theory analysis (node removal simulation).
- External collaborators
- Scripps Institution of Oceanography
- A series of dissemination material: documents and presentations for the IATTC Bycatch Working Group, as well as a peer-reviewed scientific publication