Skip to main content

Free Content Development of the Adhesive Organ in Spadella Schizoptera (Chaetognatha) with Comments on Growth and Pigmentanon

Download Article:
(PDF 1493.9921875 kb)
The development of larvae of Spadella schizoptera, hatched in the laboratory, was followed, with particular attention placed on the adhesive organ. Egg diameter averaged 0.25 mm, and newly hatched larvae were 0.83 mm, total length. Larvae attached to the substrate by means of cephalic papillae until their fifth day, at which time the posterior adhesive organ had developed at least one full digitation on each side and the larvae used these to assume the adult position. By the fifth day they also became functional predators, attacking copepod nauplii that came near.

Little is known of the biology of this species. It appears, however, that larvae of subtropical S. schizoptera reach the same functional state in their fifth day that those of temperate S. cephaloptera do in their 15th.

The development of the adhesive organ was found to be quite variable. Its shape, often used in identification of the species, cannot presently be relied upon to distinguish the species from S. nana in immature specimens.

Photographs of live specimens are presented to illustrate a common and an unusual pigmentation pattern.

8 References.

No Supplementary Data.
No Data/Media
No Metrics

Document Type: Research Article

Publication date: 1976-10-01

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