Research and analysis

A molecular approach to detect hybridisation between crucian carp and non indigenous carp species in UK waters, including a consideration of the taxon

A molecular genetic protocol was established in order to identify pure-bred crucian carp, goldfish, and common carp.

Document

A Molecular Approach to Detect Hybridisation between Crucian Carp and Non Indigenous Carp Species in UK Waters, including a Consideration of the Taxon

This file may not be suitable for users of assistive technology. Request an accessible format.

If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email enquiries@environment-agency.gov.uk. Please tell us what format you need. It will help us if you say what assistive technology you use.

Details

The Crucian carp (Carassius carassius) is a medium sized cyprinid fish which mainly inhabits small still waters. There is now a strong, but as yet unsubstantiated belief that this native species is under increasing threat from hybridisation, competition and disease from other closely related nonnative fishes such as common carp (Cyprinus carpio) and goldfish (Carassius auratus). These threats are considered to be Europe-wide and are compounded by difficulties in identification of pure-bred C. carassius and hybrids by external morphological investigation and by some unresolved taxonomic problems. Of particular note is the species in Europe commonly known as the “gibel” or “prussian” carp. It has long been discussed but is still not known whether this is a species in its own right, a subspecies of the goldfish or whether it may be of hybrid origin.

Published 1 January 2003