Cookies Policy

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

A Comparative Study of Some Mouthpart Adaptations of Uca Annulipes (H. Milne Edwards, 1837) and U. Vocans (Linnaeus, 1758) (Brachyura, Ocypodidae) in Relation to their Habitats

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.
MyBook is a cheap paperback edition of the original book and will be sold at uniform, low price.

Buy this article

$30.00+ Tax (if applicable)
Add to Favorites

image of Crustaceana

The density of spoon-tipped setae (ST setae) along the inner edge of the merus of the left second maxilliped of two Singapore species of fiddler crabs, Uca annulipes and U. vocans, was studied. A larger proportion of the inner merus edge was covered with ST setae in U. annulipes as compared to U. vocans (two-thirds vs. half of the edge, respectively). The number of ST setae did not differ significantly between males and females in both species (ANCOVA, slopes and intercepts, p > 0.05) suggesting there is no sexual dimorphism in mouthpart adaptations for these species. The combined regression equation (male + female data; CW = carapace width) for U. annulipes (n = 91) was #ST setae = 15.6 + 14.7CW with r2 = 0.63, that for U. vocans (n = 100) being #ST setae = 32.4 + 9.91CW with r2 = 0.66. For any given size of crab, significantly more ST setae were present in Uca annulipes (a sandy habitat crab) than in U. vocans (a muddy habitat species). These results provide quantitative evidence that fiddler crabs that inhabit sandy habitats possess more ST setae (an adaptation for processing sandy sediments), than those occurring in muddy habitats.


Article metrics loading...



Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to email alerts
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
    Crustaceana — Recommend this title to your library

    Thank you

    Your recommendation has been sent to your librarian.

  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation