If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

Free Content Feeding ecology of four species of sea urchins (genus Echinometra) in Okinawa

 Download
(PDF 598.2kb)
 
Download Article:

Abstract:

We studied the feeding ecology of four Echinometra species at five different sites in Okinawa in terms of distribution, food availability, and gut contents. Echinometra sp. A was widely distributed from the lower intertidal to submerged areas, while Echinometra mathaei (Blainville, 1825) was common in the upper subtidal and lower intertidal areas. Echinometra sp. C and Echinometra oblonga (Blainville, 1825) were restricted to the upper intertidal zone. Although the diets of Echinometra spp. showed remarkable differences among sites and between seasons, 39.2%–80.7% of their gut contents usually consisted of plant material. Echinometra sp. A ingested a greater variety of plants than the other three species. The availability of major plants in the field was generally proportional to their abundance in the gut, except when Echinometra relied on imported drift plants or when feeding was restricted because of severe hydrodynamics. Benthic grazing was the primary feeding mode of Echinometra living on rock platforms, while drift feeding was pronounced when macrophytes were abundant in the habitat or surroundings. Our results suggest that despite differences in physical and nutritional environments among their micro-habitats, the four urchin species have essentially similar feeding types, modes, and preferences.

Document Type: Research Article

Publication date: July 1, 2007

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
  • ingentaconnect is not responsible for the content or availability of external websites
Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect 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