Skip to main content

Free Content Stage-specific predation upon embryos and larvae of the Pacific sand dollar, Dendraster excentricus, by 11 species of common zooplanktonic predators

Download Article:
(PDF 440.7890625 kb)
A series of laboratory feeding experiments determined rates of predation by 11 species of common zooplanktonic predators upon embryonic and larval stages of the Pacific Sand Dollar, Dendraster excentricus (Eschscholtz). Rate of predation by the predator species was not constant upon the prey stages, and four patterns of predation emerged: (1) Three crustacean and two hydromedusa species consumed embryo through gastrula or prism stages, but few pluteus larvae; (2) An amphipod and a chaetognath species ate motile pre-pluteus stages, but not unhatched embryos or plutei; (3) Two fish species ate unhatched embryos, prism and pluteus larvae, but ate few blastulae or gastrulae; (4) Two ctenophore species ate few or no prey during experiments. The observed patterns of predation were presumably caused by behavioral and morphological changes that occur during embryonic and larval development of the prey, and vary between groups of predators that use different feeding mechanisms. The nine invertebrate predator species consumed few, if any plutei, while the two fish species ate plutei in substantial numbers. It is suggested that field rates of predation upon plutei are lower than those upon pre-pluteus stages where invertebrate predators predominate. Conversely, where planktivorous fish are common, plutei may be consumed at high rates.

15 References.

No Supplementary Data.
No Data/Media
No Metrics

Document Type: Research Article

Publication date: 1986-09-01

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
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