Review of the Atlantic halibut longline survey index of exploitable biomass [electronic resource] / by Stephen J. Smith
- Canadian technical report of fisheries and aquatic sciences, 1488-5379 ; 3180
- Language Note:
- Includes abstract in French.
- "This report contains the results of the review commissioned by The Atlantic Halibut Council and the Department of Fisheries and Oceans Canada (DFO) of the joint Industry/DFO annual longline survey. This survey has been used to monitor Atlantic halibut exploitable biomass since 1998. The survey was originally stratified based on areas of Low, Medium and High catch based on data from commercial fishing logs (1995-1997). Starting in 2009, a standardized catch rate calculated from a Negative Binomial generalized linear model replaced the stratified estimate of mean weight per standard set. The review recommended replacing the Negative Binomial model with a Multinomial model that not only accounts for the number of halibut caught but also the number of hooks occupied by other species or missing bait. It was not possible to fully assess the impact of covariates collected during the survey because of the observational nature of the data, but based on literature review standardization of protocols to reduce the variation in covariates is recommended. A new sample-to-strata allocation plan was presented that has potential to improve the precision of the estimates"--Abstract.
- Bibliography Note:
- Includes bibliographical references (pages 21-24).
- Type of File/Data:
- Electronic monograph in PDF format.
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