Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: The amphipod Polycheria osborni: its distribution and behavior in intertidal ascidians
Student Author(s): Featherstone, Judith
Faculty Advisor(s): Burnett, Robin
%E Abbott, Donald P.
Pages: 34
Location: Final Papers Biology 175H
Date: June 1980
Keywords: symbiosis at the seashore
Abstract: Polycheria osborni is an amphipod found quite abundantly in a variety of compound ascidian colonies in the lower intertidal and subtidal areas from Puget Sound, Washington to Southern California. In the present study the distribution of Polycheria osborni in ascidians of the lower intertidal area of Mussel Point, Pacific Grove, California was observed, including the arrangement of the amphipods in the colony, the sizes of the amphipods in the various ascidians, and a sex ratio based on a subset of the population. Behavior of the Polycheria was also observed; their behavior in the burrow and the movement of them between burrows.