Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: Chemically stimulated escape responses of Littorina planaxis and Littorina scutualata to the carnivorous gastropod Acanthina spirata
Student Author(s): Tittle, Kenneth M.
Pages: 16
Location: Final Papers Biology 175H
Date: June 1964
Keywords: periwinkle
littorina
Abstract: The predacious Muricid whelk, Acanthina spirata, secretes a substance which diffuses from its pedal mucus and to which Littorina planaxis and Littorina scutulata respond by accelerated motion and an increased tendency to leave the water. Homogenates of the foot of A. spirata have been prepared capable of eliciting a similar response, and the active substance in the homogenates show to be dialyzable and ether extractable from acidified solutions. Both L. planaxis and L. scutulata show a similar response to the Muricid whelk Thais emarginata.