Fisheries Infosite

AEBR 154 Comparison of bycatch estimation for fish species using a ratio estimator and model-based method.


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AEBR_154_2904_05_ENV2013-01_obj2&3_MS3.pdf (7.4 MB)

Commercial fisheries often catch species that are not targeted by the fishing operation (bycatch). Since this bycatch is not fully recorded it is necessary to estimate the absolute quantity using observer data. In this study we compare estimates from a ratio-based approach with a model-based estimator using data from the ling longline fishery, and scampi and squid trawl fisheries. It is argued that a model-based estimator should be the preferred approach for future work of this kind.

Document date
Tuesday, 8 September 2015
Document type
V 1.3
File format
Adobe PDF
File size
7.4 MB
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Uploaded date
Tuesday, 8 September 2015

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Author: Anderson, O.F.; Doonan, I.; Edwards, C.T.T.;
ResearchField: Poisson distribution; Poisson-Gamma; random effects;
ScienceStock: Aquatic Environment working group;

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