This document reports on research which was carried out as part of a larger programme on Species Management in Aquatic Habitats (Gulson, 1994). The Environment Agency, English Nature and the Countryside Council for Wales jointly funded the project.
Alosa alosa (allis shad) and Alosa fallax (twaite shad) are classified as rare and listed in Appendix III the Bern Convention and Annexes II and V of the EC Habitats Directive. Annex II requires that Special Areas of Conservation are designated for shad and that Member States should ensure the appropriate management of these and other sites where they are known to occur so that the favourable conservation status of the species can be secured. In addition, allis shad is protected under Schedule 5 of the Wildlife and Countryside Act (1981) and both species are now included in Section 9( 4 )(a) of the Act, which makes it an offence to intentionally obstruct access to spawning areas, or to damage or destroy gravels used for spawning.