E 

 o 



1000 



500-1 



100 



40 



30 



20 -I 

 10 

 



XXX 



X 



X 



I 



1 1 



J F M 



XXX 

 X X 



X I 



I I 



<.1 



— I 1 1 1 1 \ 1 1 — 



AMJJASOND 



month 



1=0.1-1.0 



MEAN NUMBER OF INDIVIDUALS OBSERVED PER HOUR 



X = ZONE NOT SAMPLED IN THIS MONTH 



Figure 10. Seasonal abundance and seaward distribution patterns of the Manx 

 shearwater in the northern Cheseapeake Pight, 1971-1977. 



AUBUDON'S SHEARWATER (Puffinus Iherminieri ) 



Status. --Rare summer and early fall visitant. One recorded in June in 

 extreme southern portion of study area (Fig. 11). 



Earl iest record. — 10 June 1976. 



L atest record . — 26 September 1976. 



Max imum counts. --3 seen 46 km ESE Ocean City (38°15'N, 74°34'W), 26 

 September 1976. 



R emarks . --Audubon's shearwater, the small black and white counterpart to 

 the Manx, is a tropical and subtropical wanderer to the warm waters over the 

 Continental Shelf in mid- and late summer. Its arrival in the northern Chesa- 

 peake Bight corresponds to the period when slope waters spread inshore over 

 the Continental Shelf and when surface water temperatures reach their peak for 

 the year. 



17 



