Advisor

Richard Peterson

Date of Award

7-1-1975

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Biology

Department

Biology

Physical Description

1 online resource, 21 pages, digitized photocopy of typescript.

Subjects

Animal communication, Eigenmannia virescens

DOI

10.15760/etd.2155

Abstract

The extent to which individuals of Eigenmannia virescens modulate their electric organ discharge frequencies to accommodate the frequencies of others of the same species during social interactions was investigated. Recordings of the fish's discharge frequencies, taken with Tektronix 3L5 and 5L4N spectrum analyzers, showed that, although movements of up to 60 Hz in a day may be made, the frequency movements would be made more or less synchronously by all fish in the group. An apparent preference for, and a tendency of the fish to follow one another in frequency, at frequency ratios of 2:3 (a musical fifth), 3:4 (fourth), and even 4:5 (major third) was observed. The appearance of a circadian rhythm was also noticed.

Persistent Identifier

http://archives.pdx.edu/ds/psu/13382

Included in

Biology Commons

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