Management of the exploitation of the lugworm Arenicola marina and the ragworm Nereis virens (Polychaeta) in conservation areas

摘要: 1. In Europe, bait supply to anglers from the natural environment involves: (i) collection by for own use, (ii) local semi-professional digging and (iii) professional contracted distributors. 2. The management of activity is particularly acute where there a conflict with conservation interests. 3. Two case studies are presented describing population dynamics of: I Arenicola marina in Lindisfarne nature reserve, II Nereis virens Menai Strait; both areas. 4. Case I. Populations A subject marked annual cycles number fresh weight. This illustrates response substantial overexploitation leading crash. With introduction restrictive legislation was re-established recruitment adults neighbouring unexploited populations. 5. Case N. dominated large old individuals; it does not represent sustainable resource contrast populations same species other locations. 6. The exploitation areas discussed relation world patterns utilization supply.