The activity pattern of Diadora aspera

Graduate Thesis Or Dissertation

Public Deposited

Citeable URL: https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/5999n573s

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Attribute Name	Values
Creator	Boese, Bruce Leon
Abstract	Diadora aspera is an intertidal keyhole limpet found in the mid-tidal zone. Its activity pattern was estimated under laboratory conditions using time-lapse-photography and manometric determinations of oxygen consumption. Statistical and computer analyses of the photographic data suggest the presence of both a 24 hour and a 12-13 hour rhythm in activity. Both oxygen consumption and photographic data suggest that the diel rhythm has an activity peak at noon. The oxygen consumption data also suggest that the 12-13 hour rhythm in activity is peaked 3-4 hours before high tide. Protection from predation (possibly by Pycnopodia helianthoides) is suggested as a possible factor in selection for this phasing.
Resource Type	Masters Thesis
Date Available	2012-04-04T16:07:11+00:00
Date Issued	1975-03-05
Degree Level	Master's
Degree Name	Master of Science (M.S.)
Degree Field	Oceanography
Degree Grantor	Oregon State University
Commencement Year	1975
Advisor	McCauley, James E.
Academic Affiliation	School of Oceanography
Non-Academic Affiliation	Oregon State University. Graduate School
Rights Statement	Copyright Not Evaluated
Publisher	Oregon State University
Peer Reviewed	No
Language	English [eng]
Digitization Specifications	File scanned at 300 ppi (Monochrome) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces	http://hdl.handle.net/1957/28571

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