TABLE 1. List of drilled species recovered from Puerto Lobos beach. Bulk sample of the death assemblage.

Families Species Total shells Drilled shells Drilling frequency
Fissurellidae Fissurella radiosa 74 0 0
Fissurellidae Diodora patagonica 3 0 0
Patellidae Nacella magellanica 126 5 3.97
Trochidae Tegula patagonica 241 2 0.83
Siphonariidae Siphonaria lessoni 242 2 0.83
Mytilidae Mytilus platensis 197 18 9.14
Mytilidae Brachidontes rodriguezi 437 46 10.53
Mytilidae Brachidontes purpuratus 1,160 47 4.05
Mytilidae Aulacomya atra 119 21 17.65

 

TABLE 2. Predator preferences between limpet species. Data obtained from the limpet sample.

Species Nacella magellanica Fissurella radiosa Siphonaria lessoni
Total shells      
n 448 67 194
% 63.19 9.45 27.36
       
Drilled shells      
n 38 0 2
% 95 0 5
       
Drilling frequency per species 8.48 0 1.03