Figure 7. Mean wood-loss caused by shipworms in six-monlh exposure panels collected from 1979-1986 in the vicinity 

 of the Millstone Nuclear Power Station. 



paiiitions between limnorid tunnels (Barnard 1959). These large densities of wood-boring Crustacea at WP 

 during May-Nov were the cause of the increased wood-loss noted earlier at WP for this exposure period. 



The moUuscan woodborers, shipworms, were represented in the Millstone area by Teredo navalis, the 

 native species and by T. hartschi, an immigrant species (Table 4). Shipworms were collected from every 

 site during three of four exposure periods (Fig. 9). Juvenile teredinids ( < 5 mm in length) representing 

 recent recruitment to panel communities, were most numerous during peak reproductive periods; August 



18 



