The Correlation between the Movements of Acanthina Spirata and the Density of Balanus Glandula Available for Food

Abstract

Acanthine spirata is a small, little studied predatory snail. It lives along the Pacific Coast in the intertidal region and feeds on the barnacle, Balanus glandula. In this study the movements of this snail were studied in relation to the density of its food supply. The purpose of this study was to show that a predator, such as Acanthina spirata, does range further when the density of the food supply is low.