Not Planned

The spatial variation in Species Richness of demersal fish in waters around Scotland, averaged over the period 1999 to 2009.

This dataset is part of the larger Spatial Variation of Demersal Fish in Waters Around Scotland Dataset, which includes three layers that show the spatial variation of Demersal fish (generally living on or near the seabed) in waters around Scotland (averaged over the period 1999 to 2008) for:

• Size Composition (Large Fish Indicator) (defined as the proportion of fish (by weight) in the community that is greater than 40 cm in length). The higher the value (varying between 0 and 1), the greater the proportion of large fish in the community.
• Species Richness (a count of the number of demersal fish species recorded in any survey sample).
• Species Diversity (indices that also take account of the relative abundance of each species in the sample).

All three datasets are based on surveys carried out by ICES set up to provide fisheries independent information to support stock assessments.

The spatial variation in Species Diversity of Demersal fish in waters around Scotland, averaged over the period 1999 to 2010

This dataset is part of the larger Spatial Variation of Demersal Fish in Waters Around Scotland Dataset, which includes three layers that show the spatial variation of Demersal fish (generally living on or near the seabed) in waters around Scotland (averaged over the period 1999 to 2008) for:

• Size Composition (Large Fish Indicator) (defined as the proportion of fish (by weight) in the community that is greater than 40 cm in length). The higher the value (varying between 0 and 1), the greater the proportion of large fish in the community.
• Species Richness (a count of the number of Demersal fish species recorded in any survey sample).
• Species Diversity (indices that also take account of the relative abundance of each species in the sample).

All three datasets are based on surveys carried out by ICES set up to provide fisheries independent information to support stock assessments.

The spatial variation in size composition (Large Fish Indicator) of Demersal fish in waters around Scotland, averaged over the period 1999 to 2008.

This dataset is part of the larger Spatial Variation of Demersal Fish in Waters Around Scotland Dataset, which includes three layers that show the spatial variation of Demersal fish (generally living on or near the seabed) in waters around Scotland (averaged over the period 1999 to 2008) for:

• Size Composition (Large Fish Indicator) (defined as the proportion of fish (by weight) in the community that is greater than 40 cm in length). The higher the value (varying between 0 and 1), the greater the proportion of large fish in the community.
• Species Richness (a count of the number of demersal fish species recorded in any survey sample).
• Species Diversity (indices that also take account of the relative abundance of each species in the sample).

All three datasets are based on surveys carried out by ICES set up to provide fisheries independent information to support stock assessments.

This data was prepared for the report 'Coull, K.A., Johnstone, R., and S.I. Rogers. 1998. Fisheries Sensitivity Maps in British Waters' which includes maps of the main spawning and nursery grounds for 14 commercially important species (cod, haddock, whiting, saithe, Norway pout, blue whiting, mackerel, herring, sprat, sandeels, plaice, lemon sole, sole and Norway lobster).

During the late 1990s, a collaborative project between the national fisheries laboratories (Cefas and the then Fisheries Research Services, Aberdeen), the UK Offshore Operator's Association (UKOOA), the Scottish Fishermen's Association (SFF) and the National Federation of Fishermen's Organisations (NFFO) produced the Fisheries Sensitivity Maps in British Waters.

The data is available from CEFAS via http://data.cefas.co.uk/#/View/149. This layer displays nursery grounds for Saithe.