Evaluating the Power to Detect Temporal Trends in Fishery-Independent Surveys: A Case Study Based on Gill Nets Set in the Ohio Waters of Lake Erie for Walleyes
| Autor: | Christopher S. Vandergoot, Jeff T. Tyson, Tyler Wagner |
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| Rok vydání: | 2009 |
| Předmět: |
Ecology
Variance (land use) Sampling (statistics) Management Monitoring Policy and Law Aquatic Science Statistical power Fishery Geography Sample size determination Sustainable management Survey data collection Fisheries management Duration (project management) Ecology Evolution Behavior and Systematics |
| Zdroj: | North American Journal of Fisheries Management. 29:805-816 |
| ISSN: | 1548-8675 0275-5947 |
| Popis: | Fishery-independent (FI) surveys provide critical information used for the sustainable management and conservation of fish populations. Because fisheries management often requires the effects of management actions to be evaluated and detected within a relatively short time frame, it is important that research be directed toward FI survey evaluation, especially with respect to the ability to detect temporal trends. Using annual FI gill-net survey data for Lake Erie walleyes Sander vitreus collected from 1978 to 2006 as a case study, our goals were to (1) highlight the usefulness of hierarchical models for estimating spatial and temporal sources of variation in catch per effort (CPE); (2) demonstrate how the resulting variance estimates can be used to examine the statistical power to detect temporal trends in CPE in relation to sample size, duration of sampling, and decisions regarding what data are most appropriate for analysis; and (3) discuss recommendations for evaluating FI surveys and analyzi... |
| Databáze: | OpenAIRE |
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