(full paper is archived in the Miller Library)
Title: Feeding differences between small and large individuals of the sea anemone Metridium senile
Student Author(s): Purcell, Jennifer E.
Faculty Advisor(s): Abbott, D.P.
%E Baxter, Chuck
Location: Final Papers Biology 175H
Date: June 1975
Keywords: sea anemones
Abstract: 1. Studies were made of the feeding mechanisms and sources of food in natural populations of small and large Metridium senile on wharf pilings in Monterey, California during April and May, 1975. 2. Artemia larvae and adults, the copepod Tigriopus, and squid and Mytilus pieces produced different responses in the small and large anemones when dispensed to tentacles at various distances from the mouth. Small Metridium (3-15 cm in column height) captured food larger than 1mm, the number of tentacles and portion of the oral disc involved increasing with increased size and activity of the prey. Large metridium (20-35 cm in column height) captured Artemia larvae and Tigriopus and held them in the tentacles, closing completely later. Larger prey required more time and tentacular movement to be transferred to the mouth. The large Metridium seem ideally adapted for capture of numerous planktonic organisms and the small anemones seem better suited to larger prey in relation to their body size.
Notes: Publ 1977, Bull. So. Calif. Acad. Sci. 76: 169-172