ALERT Non-Native Species Records for Signal Crayfish

Biological Records Centre

Description

Recording Invasive Species Counts (www.nonnativespecies.org/recording/) was launched in 2010 and includes on-line recording for 19 species including:

Signal Crayfish, Pacifastacus leniusculus

https://secure.fera.defra.gov.uk/nonnativespecies/factsheet/factsheet.cfm?speciesId=2498

The Signal Crayfish is designated as an ALERT species and also within RISC.

The data is predominantly provided by members of the public but records are verified from photos by designated experts.

The recording form includes the option to provide abundance and whether the individual is dead or alive (or unknown).

Geographic Description

The geographic extent of the RISC dataset is GB. Ireland records non-native species through Invasive Ireland.

The majority of records in this dataset are collated with six figure grid-references.

Purpose

Records are collated in order to add to knowledge of this group, including distribution, population trends, autecology and phenology. In addition, the scheme works with all contributing recorders to raise the profile of the species group and its conservation. Sharing the data via NBN helps achieve these aims.

Data quality

The data should be regarded as accurate because of the verification and validation mechanisms.

Methods

The data is collected by members of the public reporting their sightings through an on-line recording form (powered by Indicia). The records are casual observations. Records submitted with a photograph are verified by a designated expert and only these records are included within the dataset.

Citation

Biological Records Centre ([Insert download year]). ALERT Non-Native Species Records for Signal Crayfish. Occurrence dataset on the NBN Atlas

Rights

CC-BY

Digitised records