20th Regular Session of the Scientific Committee
Agenda Item 4.2.2.2 Long-term recruitment and CPUE trends of skipjack tuna (Project 115)
Annotation
Stability in the fishery-dependent pole and line CPUE indices influences model estimations of a stable long-term biomass trend. To account for the stable biomass trend of skipjack tuna in the face of increased catches over time the stock assessment predicts a trend of increased recruitment. Project 115 will explore any evidence for an increased recruitment trend and the occurrence and degree of effort creep and its influence on the pole and line CPUE. SC20 will review the research outcomes and provide recommendations to the Commission as needed.
The SSP also provided additional effort creep-related work, which is contained in SC20-SA-IP-16.
Stock Assessment Theme
Working Papers
| Symbol | Title | Date of Issue | Last Updated |
|---|---|---|---|
| SC20-SA-WP-06 | Exploring evidence and mechanisms for a long-term increasing trend in recruitment of skipjack tuna in the equatorial Pacific and the development and modelling of defensible effort creep scenarios (Project 115) Paul Hamer, Inna Senina, Patrick Lehodey, Naoto Matsubara, Makoto Nishimoto, Yoshinori Aoki, and Yuichi Tsuda |
Information Papers
| Symbol | Title | Date of Issue | Last Updated |
|---|---|---|---|
| SC20-SA-IP-16 | Examining Indicators of Effort Creep in the WCPO Purse Seine Fishery (Project 115) P. Hamer, T. Teears, and the PNAO |
Presentations
| Symbol | Title | Date of Issue | Last Updated |
|---|---|---|---|
| A4.2.2.2 | A4.2.2.2 Exploring evidence and mechanisms for a long-term increasing trend in recruitment of skipjack tuna in the equatorial Pacific and the development and modelling of defensible effort creep scenarios (Project 115) Paul Hamer, Inna Senina, Patrick Lehodey, Naoto Matsubara, Makoto Nishimoto, Yoshinori Aoki, Yuichi Tsuda |