Investigating Agreement between Different Data Sources Using Bayesian State-Space Models: An Application to Estimating NE Atlantic Mackerel Catch and Stock Abundance
Bayesian Markov chain Monte Carlo methods are ideally suited to analyses of situations where there are a variety of data sources,
particularly where the uncertainties differ markedly among the data and the estimated parameters can be correlated. The example
of Northeast Atlantic (NEA) mackerel is used to evaluate the agreement between available data from egg surveys, tagging, and
catch-at-age using multiple models within the Bayesian framework WINBUGS. The errors in each source of information are dealt
with independently, and there is extensive exploration of potential sources of uncertainty in both the data and the model. Model
options include variation by age and over time of both selectivity in the fishery and natural mortality, varying the precision and calculation
method for spawning-stock biomass derived from an egg survey, and the extent of missing catches varying over time. The
models are compared through deviance information criterion and Bayesian posterior predictive p-values. To reconcile mortality estimated
from the different datasets the landings and discards reported would have to have been between 1.7 and 3.6 times higher than
the recorded catches.
SIMMONDS Edmund;
PORTILLA Enrique;
SKAGEN Dankert;
BEARE Doug;
REID Dave;
2010-09-21
OXFORD UNIV PRESS
JRC54525
1054-3139,
http://icesjms.oxfordjournals.org/content/67/6/1138.full.pdf,
html?sid=77b5a54e-71e5-4981-a85a-3bf14e349a87,
https://publications.jrc.ec.europa.eu/repository/handle/JRC54525,
10.1093/icesjms/fsq013,
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