You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Circadian Rhythmicity and Other Patterns of Spontaneous Motor Activity in Frontinella pyramitela (Linyphiidae) and Argyrodes trigonum (Theridiidae)
Robert B. Suter
The Journal of Arachnology
Vol. 21, No. 1 (1993), pp. 6-22
Published by: American Arachnological Society
Stable URL: http://www.jstor.org/stable/3705374
Page Count: 17
You can always find the topics here!Topics: Spiders, Motor activity, Periodicity, Acoustic spectra, Folktales, Spectroscopy, Circadian rhythm, Statistical variance, Animals, Cylinders
Were these topics helpful?See something inaccurate? Let us know!
Select the topics that are inaccurate.
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
Endogenous biological rhythms are apparently found in all eukaryotic organisms. The most ubiquitous of these, the circadian rhythm, functions to synchronize physiology and behavior with diel changes in the environment. Data presented here demonstrate that, in the linyphiid spider Frontinella pyramitela (Walckenaer) and in the theridiid spider Argyrodes trigonum (Hentz), a circadian rhythm modulates locomotor activity in some individuals but not in others. The data also show (a) that higher-frequency endogenous rhythms play a part in determining the patterns of motor activity, and (b) that intervals between bouts of activity are influenced by aperiodic processes that appear to be stochastic.
The Journal of Arachnology © 1993 American Arachnological Society