Cookies Policy
X

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

COMPARISON OF SWIMMING SPEED AND HYDRODYNAMIC DRAG IN TWO SPECIES OF IDOTEA (ISOPODA)

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

This Article is currently unavailable for purchase.
Add to Favorites
You must be logged in to use this functionality

Cover image Placeholder

ABSTRACT Swimming speed and hydrodynamic drag were measured on several individuals of two species of valviferan isopods: Idotea resecata and Idotea wosnesenskii. Isopods were allowed to swim freely in the laboratory and their swimming speeds were timed over a known distance. Idotea resecata swam significantly faster (0.208 m/s) than I. wosnesenskii (0.121 m/s); the speed showed no correlation with body mass. The difference in swimming speed suggested that I. resecata might have lower drag. To test this hypothesis, the isopods were killed and preserved, and the drag on their bodies was measured in a flow tank. Drag data were converted to drag coefficients (based on wetted area), which revealed that I. resecata had a significantly lower CD (mean = 0.059) than I. wosnesenskii (mean = 0.084). These drag coefficients are high compared with vertebrate swimmers, but are similar to those of other arthropods. The difference between the species in CD is of the correct sign, but not sufficient to explain entirely the difference in speed. Factors affecting muscle performance must be at least as important as drag. The evidence suggests that selection for body drag reduction may have interacted with selection for other morphological attributes (such as camouflage) to produce the differences in swimming speed and drag.

10.2307/1548330
/content/journals/10.2307/1548330
dcterms_title,pub_keyword,dcterms_description,pub_author
10
5
Loading
Loading

Full text loading...

/content/journals/10.2307/1548330
Loading

Data & Media loading...

http://brill.metastore.ingenta.com/content/journals/10.2307/1548330
Loading

Article metrics loading...

/content/journals/10.2307/1548330
2017-08-22

Sign-in

Can't access your account?
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation