4f4c4942-4343-5764-6473-313136343937 English NRW_DS116496 Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2026-03-03T12:28:15.905Z NRW 1.0 wel Latitude and Longitude (EPSG::4326) Ad Hoc sightings of Invasive Non Native Species (INNS) chinese mitten crab (Eriocheir sinensis) 2013 to 2014 Ad Hoc sightings of Invasive Non Native Species (INNS) chinese mitten crab (Eriocheir sinensis) 2013 to 2014 2015 NRW Monitoring of Chinese Mitten Crabs (Eriocheir sinensis) on the River Dee (NNS) MRCCW3000000009C Achosion ad hoc o weld y Rhywogaeth Estron Oresgynnol cranc maneg Tsieineaidd (Eriocheir sinensis) 2013 i 2014 2016-02-29 NRW_DS116497 The Chinese mitten crab (Eriocheir sinensis) is registered by the Invasive Species Specialist Group (ISSG) of the International Union for Conservation of Nature (IUCN) as one of the top 100 invasive species worldwide. Mitten crabs are a catadromous species, migrating between fresh water and marine environments to reproduce. They spend the majority of their adult life in fresh water habitats, where they mature to reproductive size. Depending on mitten crab population density and habitat suitability, juvenile mitten crabs will migrate large distances up river to mature. The Dee Chinese mitten crab project set out to investigate the population of Chinese mitten crab in the Dee catchment and achieve a number of objectives including awareness raising, trialling and evaluating potential methods to monitor and manage the population and make inferences about the current and future status of the species in the Dee catchment. This dataset contains a subset of the monitoring data comprising of ad hoc sighting records of Chinese mitten crab surveyed between 2013 and 2014. The Chinese mitten crab (Eriocheir sinensis) is registered by the Invasive Species Specialist Group (ISSG) of the International Union for Conservation of Nature (IUCN) as one of the top 100 invasive species worldwide. Mitten crabs are a catadromous species, migrating between fresh water and marine environments to reproduce. They spend the majority of their adult life in fresh water habitats, where they mature to reproductive size. Depending on mitten crab population density and habitat suitability, juvenile mitten crabs will migrate large distances up river to mature. The Dee Chinese mitten crab project set out to investigate the population of Chinese mitten crab in the Dee catchment and achieve a number of objectives including awareness raising, trialling and evaluating potential methods to monitor and manage the population and make inferences about the current and future status of the species in the Dee catchment. This dataset contains a subset of the monitoring data comprising of ad hoc sighting records of Chinese mitten crab surveyed between 2013 and 2014. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en North Wales Wildlife Trust 376 High Street, Bangor, Gwynedd, LL57 1YE, Wales nwwt@wildlifetrustwales.org http://www.northwaleswildlifetrust.org.uk/ Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Species distribution GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme non-native species chinese mitten crab eriocheir sinensis river Dee (afon Dyfrdwy) River Dee (Holt To Worthenbury) Dee estuary NRW Thesaurus 2023-12-31 geonetwork.thesaurus.local.theme.converted_nrw-keywords Zoobenthos taxonomic abundance SeaDataNet Parameter Discovery Vocabulary 2021-01-06 geonetwork.thesaurus.external.theme.rdf+xml Integrated Public Sector Vocabulary 2013-04-03 geonetwork.thesaurus.external.theme.subjects NRW SMNR Vocabulary 2023-12-27 geonetwork.thesaurus.local.theme.converted_nrw-smnr-keywords There are no access restrictions on this data. NRW may release, publish or disseminate it freely. no limitations © CNC/NRW Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose. English biota SeaVoX Vertical Co-ordinate Coverages 2021-01-06 benthic boundary layer Wales (WLS) -3.94820701 -2.42988132 52.74752805 53.47383443 2013-01-01 2014-12-31 Documents [A] Currently held in Marine Recorder [B] Spreadsheet available [C] Report in PDF Format Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false This dataset is made up of ad hoc sightings and therefore methods vary depending on the record. This dataset is made up of ad hoc sightings and therefore methods vary depending on the record.