Exotic barnacles and bryozoans turn up in marina surveys
Non-native species continue to turn up in marinas in south west England and Brittany, surveys undertaken as part of Marinexus show.
Amongst the notable records are two species of goose barnacle and the first English appearance of the bryozoan Schizoporella japonica.
Conchoderma auritum is a goose barnacle that often attaches to the big ‘acorn’ barnacle Coronula that frequently makes raised white patches on hump-back whales. It is also known from ship hulls, buoys, logs etc.
The more numerous species amongst the specimens collected, C. virgatum, has been recorded attached to turtles and occasionally fish and sea-snakes, but also to boat hulls; it is rarely found this far north.
The barnacles were spotted in a Plymouth marina on a yacht that had come from Florida via Bermuda.
Both species of goose barnacle and the bryozoan Schizoporella japonica were seen during Marinexus rapid assessment surveys of marinas in southwest England and Brittany.
For more information on work on invasion ecology of sessile marine animals, see the web pages of the Bishop group at the Marine Biological Association.