Antifoul & Invasive Species
Antifoul
Antifouling paints work
largely by releasing biocides (pesticides) into the water, thus
preventing organisms from attaching themselves to the bottom of the
boat. Whilst this is good for keeping the hull clean, improving
efficiency through the water and preventing the spread of non
native invasive species from location to location, it does mean
that some of the toxic ingredients can leach into the water.
Even though this slow
leaching can cause toxins to build up in the food chain, the main
problems associated with antifouling occur when high concentrations
of antifouling enter the water in runoff from high pressure hosing
and scrapings from boat wash down. High concentrations of copper
tend to be found in the sediment around lift out points in
estuaries and rivers and can find their way into the food chain
causing a wide range of environmental problems.
Best Practice Advice Leaflets & Resources Marine Toolkit
Non Native Invasive Species
Non native
invasive species are introduced non-native species that have become
established outside of their normal habitat or native country.
Hitching a ride on a boat hulls, propellers or in ballast and bilge
water, these aliens arrive in UK waters and can have extremely
damaging effects on our eco systems and biodiversity. There are
currently about 65 marine non native species in Britain, with many
species thriving in both salt and fresh water.
Fast-growing
species like Zebra mussels are already causing problems in many
areas, blocking engine cooling water intakes resulting in engines
over-heating. Didemnum Vexillum, known as Carpet Sea
Squirt, has a smothering effect; covering aquatic habitats in thick
sheet-like growths, interfering with fishery and aquaculture
operations. Once established, non-native species become
extremely difficult and expensive to eradicate.
Best Practice Advice Leaflets & Resources Marine Toolkit
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The Green Blue launches its new Green Guide for Marina
Managers click here
New case study on Sunsail's green fleet of F40s
click here
Congratulations to Claire France, winner of the prize
draw from The Green Blue Survey 2012