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Management Guidance for the Invasive Non-native Quagga Mussel - WC1070

The quagga mussel (Dreissena rostriformis bugensis) is a highly invasive non-native freshwater species from the Ponto-Caspian region. A draft risk assessment (conducted for Defra by CEC) for this species has identified it is very likely to enter and establish in Great Britain in the near future, with major impacts to ecosystems and a range of economic interests. The impacts are likened to those of zebra mussel (Dreisena polymorpha), but are potentially worse due to wider habitat tolerance.

The quagga mussel is not yet present in Great Britain. This project is intended to provide guidance on potential management, if any, that could be used to eradicate this species should it be found in GB waters.
Relevant management methods will be assessed against different situations in which this species might be found, examples of which include:
1. Small isolated water body
2. Large isolated water body
3. Isolated water body used for drinking water
4. Flowing water (river / stream)
5. Brackish water
For each scenario the difference in approach for varying sizes of population will be considered, i.e. is there a threshold in population size above which the method is unlikely to be successful or acceptable?

Recommended methods will be assessed for:
• Safety of use in the vicinity of drinking water sources
• Effect on the functionality of treated waters
• Environment risks (including the degradation of chemicals, etc)
• Any regulatory / licensing / permitting issues
• Practical aspects in relation to effective delivery / application

In addition to eradication options, a review will be undertaken to identify any specific protocols not already included as part of the ‘check, clean, dry’ campaign that could be used to help contain and reduce the risk of spreading this species.
Project Documents
• EVID2 - Proposal for a research project : Quagga Mussel proposal 2012   (166k)
Time-Scale and Cost
From: 2013

To: 2013

Cost: £13,930
Contractor / Funded Organisations
Cambridge Environmental Consultants
Alien Species              
Wildlife Management