JSM 2005 Online Program

Abstract #303360

This is the preliminary program for the 2005 Joint Statistical Meetings in Minneapolis, Minnesota. Currently included in this program is the "technical" program, schedule of invited, topic contributed, regular contributed and poster sessions; Continuing Education courses (August 7-10, 2005); and Committee and Business Meetings. This on-line program will be updated frequently to reflect the most current revisions.

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Activity Number:	263
Type:	Topic Contributed
Date/Time:	Tuesday, August 9, 2005 : 10:30 AM to 12:20 PM
Sponsor:	Section on Survey Research Methods
Abstract - #303360
Title:	Estimating Trend in Oregon Coastal Coho Salmon Populations Using a Multipanel Sampling Design
Author(s):	Don Stevens, Jr.*+ and William Gaeuman
Companies:	Oregon State University and Oregon State University
Address:	Statistics Department, Corvallis, OR, 97331, United States
Keywords:	enviromental sampling ; panel surveys ; trend estimation ; model-assisted
Abstract:	In 1998, the Oregon Department of Fish and Wildlife (ODFW) initiated a survey of coho salmon in Oregon coastal streams using a multipanel survey. One panel is visited every year, some after 3 years, and some after 9 years. In this paper, we explore design-based, model-assisted ways of estimating change and trend using data available after six years of sampling. At this point, the annual panel has been visited six times, three panels have been visited twice, and six panels have been visited only once (a different panel in each of years one through six). The approach used here assumes the response of interest is the site-specific, least-squares estimate of slope based on six years of data. The response is observable only for the annual panel. We treat the slopes based on two-year pairs as predictor variables and use regression estimators to get a composite estimator. Results are illustrated using ODFW data on coho salmon density.

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