Table 112 (continued) 


Animal Food—cont. 
Nassarius trivittatus (Gastropoda) 2% (4-13) 
Triphora perversa (Gastropoda) 2 (¥-13) 
Odostomia impressa (Gastropoda) 2 (4-13) 
Brachidontes recurvus (Pelecypoda) 2 (#-13) 
Polychaeta 2 (+#-13) 
Ovalipes oceliatus (Decapoda) 2 (+=13) 
Decapoda (sp. 7?) 2 (+-13) 
Mollusca (sp. ?) 2 (*#-13) 
—— 
i Collected November-February. Percentage occurrence of foods that made up 
5% or more of the volume in individual birds. Figures in parentheses show 
95% confidence limits. 
Table 113 
FOODS OF 9 CANVASBACKS FROM TURBID BRACKISH ESTUARINE BAYS 
OF FISHING BAY AND THE NANTICOKE RIVER+ 
Leaves, Stems and Rootstalks of 
Submerged Aquatic Plants 22% (2-61) 
Eelgrass 11 (4-49) 
Widgeongrass 11 (+-49) 
Grain 33% (7-71) 
Corn (bait) 33 (7-71) 
Animal Food 100% (66-100) 
Macoma balthica (Pelecypoda) 76 (3998) 
Mollusca (sp. 7) 22 ( 2-61) 
Mulinia lateralis (Pelecypoda) 11 ( +-49) 
Sayella chesapeakea (Gastropoda) 11 ( +49) 
Xanthidae 11 ( +-49) 
Cyathura sp. (Isopoda) 11 ( +-49) 
i Collected October-March. Percentage occurrence of foods that made up 5% or 
more of the volume in individual birds, Figures in parentheses show 95% con- 
fidence limits. 
172 
