|The size selection of clams by African black oystercatchers and kelp gulls|
Ward, D. (1991). The size selection of clams by African black oystercatchers and kelp gulls. Ecology 72(2): 513-522
In: Ecology. Ecological Society of America: Brooklyn, NY. ISSN 0012-9658, more
Clams; Gulls; Selective feeding; Marine
The preferences of Haematopus moquini and Larus dominicanus for different size classes of the sand-burrowing bivalve Donax serra were examined. Gulls took only large clams, regardless of the avaiilability of the different size classes, a preference ascribed to the high energy expenditure required for gulls to open clam shells. Oystercatchers, which open bivalve shells relatively easily, took both small and large clams, even when large clams were abundant.