Countryside Council for Wales (CCW) Freshwater Fish Ad-hoc Records for Habitats Directive (Council Directive 92/43/EEC) Reporting under Article 17

Quality Control

This dataset is a collation of records that constitutes a gap filling exercise rather than a coherent dataset in itself. Consequently it should not be viewed as being spatially or temporally representative. However, it may be used in combination with other data to make assessments of the range and / or occurrence of relevant species. We have high confidence in the taxonomic quality of the records.

Method steps

1. There were numerous methods of data capture including formal site condition assessments, monitoring through surveys, and a compilation of ad hoc records. This dataset includes records collected by various methods, including hydroacoustic monitoring, netting, electrofishing and visual surveys. Records come from various sources, including members of the public. These records in particular are normally validated with photographic or video evidence. Survey effort varies greatly and the dataset should not be assumed to be statistically representative. National Grid References (NGRs) have been reported to the highest level of accuracy, where available. In most cases this is 6 figures or more (e.g. AB123456).

All Wales.