Advisor

Randy Zelick

Date of Award

1-17-2018

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Biology

Department

Biology

Physical Description

1 online resource (v, 56 pages)

DOI

10.15760/etd.6043

Abstract

The Neotropical catfish Pterygoplichthys pardalis produces a harsh stridulation sound upon manual capture. This stridulation sound is made on the abduction of the pectoral fin spine, and is accomplished by friction of a ridged dorsal condyle against a rough spinal fossa of the cleithrum in the pectoral girdle. The sound produced has an average frequency of 121 Hz, and is used with other anti-predator adaptations such as bony subdermal armor and defensive fin-spreading. Pterygoplichthys pardalis does not display behavioral modification in response to conspecific stridulation sound, and therefore it is likely that stridulation sound in P. pardalis is being used as a predator deterrent.

Persistent Identifier

http://archives.pdx.edu/ds/psu/23894

Available for download on Thursday, January 17, 2019

Included in

Biology Commons

Share

COinS