Fall Distribution of Northern Shrimp on Eastern Scotian Shelf (TIFF)

Fall Distribution of Northern Shrimp on Eastern Scotian Shelf: TIFF file. From Fisheries and Oceans Canada, updated Oct 2026. View metadata, licence and the direct download on CanQuery.

Format

TIFF

Access

Original download only

Publisher-reported update

2026-10-13

The data layers (.tif) presented are the result of a delta negative binomial spatio-temporal generalized linear mixed model (i.e., a species distribution model) fit to the Northern shrimp (Pandalus borealis) data collected on the annual snow crab survey, which takes place yearly between August and December across the Scotian Shelf. This method accounts for the linear effects of depth and temperature on both presence/absence and positive relative abundances of Northern shrimp. The method further models latent spatial and spatio-temporal processes as random effects using Gaussian random fields with Matérn covariance matrices. The outputs are yearly spatial rasters of the predicted relative abundance of Northern shrimp across the domain covered by the snow crab survey. Given that this survey does not target shrimp, its selectivity and catchability in regards to Northern shrimp are unknown and the results remain on the scale of relative instead of absolute abundances. Reference: McDonald, R.R., Christie, K., and Glass, A. 2026. Using environmental and nontargeted data for the validation of a fishery-independent survey for northern shrimp (Pandalus borealis). Canadian Journal of…

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