Inhibitory learning and memory in the topshell (Monodonta lineata)

Abstract

One hundred eighty topshells (Monodonta lineata) were exposed to inhibitory learning procedures. Results indicate that (1) topshells are capable of inhibitory learning, (2) long-term memory for this type of learning persists for at least 32 days, and (3) topshells housed in groups of 10 learned more efficiently than did those housed in groups of 5. The latter groups, however, learned more efficiently than did animals housed singly. These results were interpreted in terms of the evolutionary significance of such behavior.