Estimating total uncertainty for abundance at age estimates from acoustic‐trawl surveys
| Autor: | Paul D. Walline, Mathieu Woillez |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Stock assessment
Acoustics and Ultrasonics Backscatter media_common.quotation_subject Autocorrelation Sampling (statistics) Arts and Humanities (miscellaneous) Abundance (ecology) Statistics Econometrics Conceptual model Environmental science Sensitivity analysis Bootstrapping (statistics) media_common |
| Zdroj: | The Journal of the Acoustical Society of America. 129:2694-2694 |
| ISSN: | 0001-4966 |
| DOI: | 10.1121/1.3589036 |
| Popis: | A comprehensive quantitative treatment of acoustic‐trawl survey uncertainty that includes all major components of measurement and sampling error is needed to help specify the level of risk in stock assessment models. Acoustic and trawl sampling errors can be addressed by geostatistical simulations, which account for autocorrelation, non‐independence, and non‐random sampling, while additional sources of uncertainty, such as ship motion and instrument errors, can be incorporated into uncertainty estimates by bootstrapping. A conceptual model is presented in the form of a flow diagram, which identifies sources of uncertainty and recommends analytical methods to quantitatively assess the uncertainty associated with abundance at size estimates. Sequential geostatistical simulations of the spatial distribution of backscatter attributed to walleye pollock from Eastern Bering Sea acoustic‐trawl surveys show that the acoustic sampling error is one of the two largest sources of uncertainty in estimates of total abu... |
| Databáze: | OpenAIRE |
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