Japanese oyster drill, Ocinebrellus
inornatus is a predatory gastropod feeding principally on
oyster Crassostrea gigas. Since
2006-2010, the invasive Japanese oyster drill has been reported in the Limfjorden. It has been observed that the snail can predate on both invasive and native bivalve species.
Little is known about the snail biology, feeding and reproduction strategy in DK. As it is a potential threat to the native oyster and mussel beds, the objectives of this project are
The two objectives of this project are: 1) to experimentally determine
the food preference (different size) and predation pressure of the oyster drill
given the choice of invasive and native bivalve species; 2) to study the snail
population age structure using the statolith structure of snails hatched in the
laboratory and collected in different areas of the Limfjorden in 2018.
The outputs of this project will provide new
insights into the status of the oyster drill population and the potential
impact on wild and invasive bivalve populations in the Limfjorden, as well as input for future sustainable
ecosystem-based fisheries management.
I samarbejde medHenrik Glenner, Jørgen Lützen