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Produce Statistically Valid Harvest Estimates

Determine the precision of treaty catch estimates and ensure they are estimated in a statistically valid way. Ultimately, this project will determine and formalize statistically valid sampling protocols for tribal harvest estimates throughout the Columbia Basin. In 2009, the project will focus on the catch survey design for the Zone 6 treaty gillnet fishery.

Tribal commercial gillnet fishers.

Project Goal:

Determine the precision of treaty catch estimates and ensure they are estimated in a statistically valid way. Ultimately, this project will determine and formalize statistically valid sampling protocols for tribal harvest estimates throughout the Columbia Basin. In 2009, the project will focus on the catch survey design for the Zone 6 treaty gillnet fishery.

Impacts

Improved harvest estimates for use in management decisions.

Background

This project will evaluate the monitoring framework for harvest estimates, document the current sampling scheme and catch estimation methods, determine a statistically valid sampling protocol that will provide for estimating precision of catch estimates, calculate precision of past catch estimates, if possible, and identify improvements of the current sample design or estimation methods. Also, monitoring will be improved by implementing better data collection and distribution technologies.

Project Tasks

Primary objectives for 2009 are to:

  1. Observe current sampling methods.
  2. Document current and historical sampling and estimation methods.
  3. Improve the survey design, if possible, to maximize precision of estimates under existing funding.
  4. Document a formal sampling protocol for future years.

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