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From issue:   Issue:   British Wildlife 08.3 February 1997

Fresh- and Brackish-water Molluscs: Some Current Conservation Issues

By - Martin Willing

There are approximately 72 British species of fresh- and brackish-water molluscs. It is difficult to give an exact figure for several reasons. Firstly, where is brackish water considered to give way to fully marine conditions? A number of brackish species such as the Laver Spire Snail, Hydrobia ulvae, that appear on non-marine lists (such as the Conchological Society's non-marine Mollusca recording card) do survive for periods in fully salt water in estuaries and tidal creeks.

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"British Wildlife is the pulsating heart of the UK nature conservation movement."

Matthew Oates, National Trust

"The most important and informative publication on wildlife of our times"

Michael McCarthy, The Independent

"Packed with readable, thoughtful, up to date articles; written by ecologists and naturalists for ecologists and naturalists"

Nick Baker, Presenter and Naturalist