You can use the Project Search Tool below to browse over the staff’s research projects, including their brief summaries, that are currently under way, or planned for the near future and funded under the 5-year Strategic Science Plan (2019-2023). The summaries include, for each project, background information, a work plan, and a progress report, as well as details of its relevance and purpose, external collaborators, duration, and deliverables; also, for existing projects, an update on activities since the previous year’s report.
This information can also be found on the IATTC-98b-Staff activities and research plan.
6 Project(s)N.2.a - Develop models of the effects of climate change on pre-recruit life stages of tropical tunas01 Jan 2018 - 31 Dec 2022FundedObjectives:
Investigate experimentally the effects of important climate change factors on early life stages of tropical tunas, and incorporate those results into models that can predict climate change effects on the distribution and abundance of tropical tunasO.1.b - Quantifying spatial and ontogenetic variation in the feeding ecology of skipjack tuna in the eastern Pacific Ocean01 Jul 2019 - 31 Dec 2020FundedObjectives:
O.1.c - A review of methods to determine prey consumption rates, gastric evacuation and daily ration of pelagic fishes: a precursor to experimental estimation for key predators in the EPO01 Jan 2019 - 31 Dec 2021FundedObjectives:
- Broadly describe the trophic ecology of skipjack tuna in the EPO using classical stomach-contents analysis
- Quantitatively disentangle spatial, temporal, and ontogenetic differences in diet to identify important habitats of skipjack and their forage
O.2.a - Develop and implement analytical tools for understanding the trophic ecology of apex predators01 Jun 2018 - 01 Apr 2019FundedObjectives:
- Review available methods to estimate prey consumption and gastric evacuation rates and daily ration to reliably estimate the consumption biomass ratio (Q/B) for tropical tunas and tuna-like fishes in ecosystem models being developed for the EPO.
- Recommend a reliable method(s) that is feasible, practical and cost-effective for estimating Q/B for key predators in the EPO ecosystem.
O.2.b - An updated ecosystem model of the tropical EPO for providing standardized ecological indicators for monitoring of ecosystem integrity01 Jun 2018 - 30 May 2021FundedObjectives:
- To further develop and validate statistical tools for the analysis of complex datasets in trophic studies of apex predators.
- To enhance external collaborations and professional development through the analysis of Atlantic bluefin tuna diets in relation to biological and environmental variables.
01 May 2021 - 31 May 2023FundedObjectives:
- Update the Ecopath ecosystem model developed for the eastern tropical Pacific Ocean (ETP) by Olson and Watters (2003).
- Convert the model to Ecopath with Ecosim (EwE) software version 6.5.
- Update the model with annual catch, discards, fishing mortality and fishing effort data for each functional group from 1993 to present.
- Calibrate the model with new catch and effort time series to improve the reliability of model forecast outputs.
- Produce annual ecological indicators for inclusion in the Ecosystems Considerations report as standardized measures of ecosystem integrity.
- 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