Native and non native marine biofouling species present on commercial vessels using Scottish dry docks and harbours.

Biofouling samples from the hulls of commercial vessels using Scottish dry docks and harbours were collected to investigate which species are being transported into Scottish waters. During 2009 – 2012 a total of 29 vessels were surveyed in three dry docks and a dive team was used to sample a further six vessels at two busy North Sea harbours. The vessels were representative of those servicing the North Sea oil industry e.g. tugs, supply and safety stand by vessels and provide a good indication of the type of fouling found on vessels that typically trade in Scottish coastal waters. The biofouling consisted of typical North Sea species and four established non native species, Jassa marmorata, Caprella mutica, Austrominius modestus and Amphibalanus amphitrite were recorded. No new non native species were recorded during this study.