biosecurity in response to the invasive shrimp, dikerogammarus villosus dr mark diamond, environment...
Post on 15-Jan-2016
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Biosecurity in response to the invasive shrimp, Dikerogammarus villosus
Dr Mark Diamond, Environment Agency
Current situation
Grafham Water Diddington Brook ?Cardiff BayEglwys Nunydd & Tata’s ditch
Monitoring:80 other sites considered at risk are all negative
Kick-sampling and trap-sampling ongoing
Biosecurity at known locations
Local Risk Assessment and management plan produced for the three sites
Anglers
Water Sports
Diddington Brook / Tata ditch
Testing of efficacy of biosecurity measures at Grafham Water
Biosecurity : what have we learnt ?
Jet-washing greatly reduces the numbers of shrimpSmall shrimps are hard to see (!)
The residual risk from boatsand trailers is low after supervised biosecurity
Nets, bass bags and neoprene stocking and boot waders need particular attention
Disinfectant needed (R&D started)
Biosecurity what have we learnt 2: Survival in damp conditions
In a concrete outbuilding (1 – 10 oC)
Survived 6 days on a folded damp net
9 days in a plastic groove
15 days in a folded wader
All die within 48 hours of drying
Ideal biosecurity: current advice
Signage and guidance on-siteOne point of access, with supervisionAll equipment that enters site should be clean and have been dry for 48 hoursMinimise contact with waterAfter use equipment should be thoroughly washed and thoroughly dry for 48 hours before being used elsewhereIndependent post-biosecurity check
How can Riverfly Partnership and AMI help?
Look out for the shrimp when monitoring
Take biosecurity measureswhen sampling
Promote good biosecurity elsewhere
Further information at https://secure.fera.defra.gov.uk/nonnativespecies/alerts/index.cfm?id=3
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