Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: Diurnal patterns of ammonia release in marine and terrestrial isopods
Student Author(s): Kirby, Philip K.
Faculty Advisor(s): Phillips, John H.
Pages: 26
Location: Final Papers Biology 175H
Date: June 1973
Keywords: Isopoda
Abstract: Diurnal rhythms in ammonia release were studied in the following eight species of isopods found in Monterey, California: Porcellio scaber (Latreille, 1804), Alloniscus perconvexus (Dana, 1854), Armadillidium vulgare (latreille, 1804), Idothea montereyensis (maloney, 1933), Idothea kirchanskii (Lee, 1967), Idothea resecata (Stimpson, 1857), Cirolana harfordi (Lockington, 1877), and Lironeca vulgaris (Stimpson, 1857). All species studied except C. harfordi showed conspicuous peaks of release between noon and 4 pm, and minima at various times during the night. The experiments, carried out on fed male specimens in constant light are believed to represent a general pattern in isopods.