The descriptive text, below the map, is from the Cornish Red Data Book (2009). The map on this web page depicts the organisms distribution and shows the records made pre-2000 and those made since.
Range & Status
The Brook Lamprey, like all lampreys requires clean, flowing water with loose gravel
and pebble substrate to spawn successfully. Once the eggs hatch the emergent larvae burrow into silty ground where they develop for about six years, ammoceote, before metamorphosing into the adult form. Brook Lampreys are typically found in small, shallow streams, often near the headwaters of major river systems. Like the other two British species it is threatened by habitat degradation. The Cornish population, mainly in rivers to the east of the county, is large and relatively unthreatened at the present time. Lampetra planeri is listed in EC Habitats Directive in Annex IIa and in Appendix III of the Bern Convention and is a Species of Conservation Concern.
I.J. Bennallick, S. Board, C.N. French, P.A. Gainey, C. Neil, R. Parslow, A. Spalding and P.E. Tompsett. eds. 2009. Red Data Book for Cornwall and the Isles of Scilly. 2nd Edition.Croceago Press.
The Cornish Red Data Book Project was led by the Cornwall and Isles of Scilly Federation for Biological Recorders (CISFBR). The full text and species accounts (minus the maps) are available on the CISFBR website.