Skip to main content

Free Content Sexual reproduction in the invasive octocoral Carijoa Riisei in Hawaii

Download Article:
 Download
(PDF 451.51953125 kb)
 
Since its initial discovery on Oahu in 1966, the azooxanthellate octocoral, Carijoa riisei (Duchassaing and Michelotti, 1860), has spread across the main Hawaiian Islands and proliferated in abundance. To help understand the substantial ecological success of C. riisei in Hawaii, its sexual reproduction was examined. Carijoa riisei is gonochoric with a male to female ratio of one. Gametogenesis is asynchronous, continuous, and does not exhibit seasonal or lunar periodicity. Carijoa riisei spawns negatively buoyant eggs which suggests external fertilization and possibly benthic larvae. Under favorable conditions, C. riisei exhibits high polyp fecundity. Asynchronous, continuous spawning of gametes is an unusual mode of reproduction which forgoes the advantages of concentrating gametes in space and time and requires dense aggregations of male and female colonies in close proximity to ensure fertilization success. Other life history traits such as fast growth, vegetative propagation, and superior competitive ability enable C. riisei to form dense, multi-colony aggregations thereby facilitating sexual reproduction. Provided C. riisei can achieve a critical density, this unusual sexual reproductive strategy probably enables it to exploit the ephemeral availability of space across time with a high and continuous production of larvae.

43 References.

No Supplementary Data.
No Data/Media
No Metrics

Document Type: Research Article

Publication date: 2008-01-01

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