A-47 



ambiguous results. The percent of faunal overlap between 

 depth intervals was frequently amplified or decreased by 

 patchy distribution of the organisms and by substrate varia- 

 bility. For example, faunal similarities between adjacent 

 50-meter depth intervals is fairly low in shallow water 



(100-300 m) . It ranges from 0% to 50% but is frequently as 

 low as 10%. This phenomena is probably a reflection of the 

 rather restricted depth zones of many of the species found 

 in the shelf faunal province. This situation is further 

 complicated by the fact that a large geographic area is con- 

 tained within a depth interval and thus that depth interval 

 is more likely to include a variety of gradational substrate 

 types. Percent faunal similarity is somewhat higher, 

 frequently from 50% to 80%, between adjacent dives within a 

 depth interval. However, there is a marked difference 

 between the fauna of the southern area when compared with 

 that of the northern area (0% to 30%) . The southern shelf 

 province is dominated by Munida valida and the white sea pen, 

 while the northern province shows much greater variability. 

 This province is dominated by the white sea pen, a small 

 pink amphipod, a shrimp, and the ophiurid Amphitimna 

 olivaaea. A pueblo community as defined by Warme et al. 



(1978) was seen at a depth of 250 meters in Carteret Canyon. 

 Dominant taxa were Canaev borealis , occasional lobsters and 



r 



fish. A similar pueblo community was seen at a depth of ] 50 

 meters in Veatch Canyon. 



