Source - Journal of Northwest Atlantic Fishery Science, Volume 27: 119-132
ISSN-0250-6408

S. X. Cadrin. 2000. Evaluating Two Assessment Methods for Gulf of Maine Northern Shrimp Based on Simulations. J. Northw. Atl. Fish. Sci. 27: 119-132. https://doi.org/10.2960/J.v27.a11

Analyses of simulated data with measurement errors, process errors, and model specification errors similar to those for the fishery for Gulf of Maine northern shrimp, Pandalus borealis, demonstrate that a stage-based model (catch-survey analysis) provides accurate estimates of stock abundance, and that a surplus production model (ASPIC: a stock production model incorporating covariates) indicates accurate trends in stock biomass when catch and relative stock size indices are measured with moderate to high precision. However, the accuracy of catch-survey estimates decreases when the precision of input data is low (i.e. greater than 30% coefficient of variation). Results suggest that catch-survey analysis of data with a wide range of observations is more reliable than those with a restricted range. Despite bias in estimates of stock biomass from ASPIC, trends in stock size are generally accurate.

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Language - English
Publisher - Northwest Atlantic Fisheries Organization (NAFO), Dartmouth, N.S., Canada
Publication Date - December 2000
Publication Type - Journal Article

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