Tuna Fishing at Cross Seamount

Dr. John Sibert

Table of Contents:

Tuna Fishing at Cross Seamount

Collaborators

Outline

Offshore Fishing Grounds

Estimated Number of Vessels in the Offshore Handline Fishery, 1978-86

Sizes of Tagged Tunas

Combined Monthly Production (1991-1995)

Estimated Offshore Catch, 1995

Fishery Management Concerns

Scientific Issues

Offshore Tagging Summary

Integrated Statistical Modeling

Maximum Likelihood Estimation

How do you know your model works?

Model 1:

Model 1

Poisson Likelihood

Model Comparisons

Model 1d

Model 2:

Model 2:

Model 2:

Fishing Mortality

Effort Deviations

PP Presentation

PP Presentation

Parameter Estimates

Fishery Management Concerns

PP Presentation