All three lamprey species occurring in western Europe are found in the
Loch Lomond area: Sea Lamprey Petromyzon marinus L., River Lamprey La
mpetra fluviatilis (L.) and Brook Lamprey Lampetra planeri (Bloch). Th
ere are major differences in ecology among the three species and in ea
ch some features seem to be unique to the Lomond populations. Availabl
e data on the ecology of the three species in the area are presented a
nd existing threats reviewed. Future research and conservation require
ments are outlined.