Skip to main content

Free Content Ontogeny and Overlap in the Diets of Four Tropical Callinectes Species

Download Article:
 Download
(PDF 623.3076171875 kb)
 

Abstract:

The diets of four Callinectes spp., Portunidae, from a small tropical lagoon were examined for ontogenetic and interspecific variation. The primary food organisms were crabs, fishes, shrimp, amphipods, bivalves, and polychaetes; but the relative importance of each varied greatly with crab species and size. Callinectes danae had the least varied diet, relatively low proportions of detritus and consumed mostly large motile prey suggesting a diet more predacious than the other three species. Callinectes sapidus had a highly diversified diet with three primary feeding types ontogenetically. Callinectes bocourti showed considerable dietary overlap with C. sapidus, and Callinectes ornatus demonstrated greatest ontogenetic variation. Crabs of small size classes showed greatest interspecific variation within comparable size classes. Dietary diversity was also greatest in small crabs and least in the largest size classes, while prey size, in terms of kind of prey, increased with crab size. Overall, few strong similarities occurred either within a species or between comparable size classes of different species. This suggests that the incorporation of size and species specific trophic information may be necessary for an understanding of community or ecosystem structure even when considering closely related species.

Document Type: Research Article

Publication date: 1990-01-01

More about this publication?
  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Terms & Conditions
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more