Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: Observations on the distribution and behavior of the commensal amphipod Polycheria osborni in intertidal ascidians at Pacific Grove, California
Student Author(s): Rehm, R. Bruce
Faculty Advisor(s): Abbott, Donald P.
Pages: 23
Location: Final Papers Biology 175H
Date: June 1981
Keywords: ascidians
Abstract: Polycheria osborni is an amphipod of the suborder Gammaridea that is known to live in the tunic of several different species of colonial ascidians. The present study was undertaken to provide additional data on the distribution and abundance of the amphipod, a quantitative look at the ability of ascidians to heal a vacated Polycheria osborni burrow, and observations on the feeding habits of Polycheria osborni. It also reports the finding of a second species of commensal gammarid amphipod, this one living in the common cloacal cavity of the ascidian Aplidium solidum.