Helgoländer Meeresuntersuchungen

, Volume 45, Issue 4, pp 487–492 | Cite as

An alternative mode of larval development inScoloplos armiger (O. F. Müller, 1776) (Polychaeta, Orbiniidae)

  • S. Plate
  • E. Husemann
Article

Abstract

During a three-year plankton monitoring at the island of Helgoland (German Bight, North Sea), pelagic larvae ofScoloplos armiger (O. F. Müller, 1776) were observed to occur regularly from February to April. Up to the present day, only benthic development within egg cocoons has been described (Anderson, 1959). Planktonic larvae comprise early, ovoid trochophores up to advanced stages with 11 setigers. The main morphological difference between the two larval types is the more numerous differentiation of lateral cilia by the pelagic larvae. Annual alterations in appearance and abundance suggest that reproduction is correlated with water temperature.

Literature Cited

  1. Anderson, D. T., 1959. The embryology of the polychaeteScoloplos armiger. — Q. Jl microsc. Sci.100, 89–166.Google Scholar
  2. Chapman, G., 1965. The egg cocoons ofScoloplos armiger O. F. Müller. — Biol. Bull. mar. biol. Lab., Woods Hole128, 189–197.Google Scholar
  3. Delsman, H. C., 1916. Eifurchung und Keimblätterbildung beiScoloplos armiger O. F. Müller. —Tijdschr. ned. dierk. Vereen.14, 383–498.Google Scholar
  4. Gibbs, P. E., 1968. Observations on the population ofScoloplos armiger at Whitstable. — J. mar. biol. Ass. U.K.48, 225–254.Google Scholar
  5. Giere, O., 1968. Die Fluktuationen des marinen Zooplanktons im Elbe-Aestuar. — Arch. Hydrobiol. (Suppl.)31, 379–546.Google Scholar
  6. Jägersten, G., 1972. Evolution of the Metazoan life cycle. Acad. Press, London, 282 pp.Google Scholar
  7. Muus, B. J., 1967. The fauna of Danish estuaries and lagoons; distribution and ecology of dominating species in the shallow water reaches of the mesohaline zone. — Meddr Danm. Fisk.—og Havunders.5, 3–316.Google Scholar
  8. Rachor, E., 1990. Changes in sublittoral zoobenthos in the German Bight with regard to eutrophication. — Neth. J. Sea Res.25, 209–214.Google Scholar
  9. Smidt, E. L. B., 1951. Animal reproduction in Danish Waddensea. — Meddr Kommn Danm. Fisk.—og Havunders. (Ser. Fiskeri)11, 1–151.Google Scholar
  10. Wolff, W. J., 1973. The estuary as a habitat-analysis of data on the soft-bottom macrofauna of the estuarine area of the rivers Rhine, Meuse and Scheldt. — Zool. Verh., Leiden126, 1–242.Google Scholar

Copyright information

© Biologische Anstalt Helgoland 1991

Authors and Affiliations

  • S. Plate
    • 1
    • 2
  • E. Husemann
    • 1
    • 2
  1. 1.AG Entwicklungsphysiologie der TiereRuhr-Universität Bochum, Lehrstuhl für spezielle Zoologie und ParasitologieBochum 1Federal Republic of Germany
  2. 2.Biologische Anstalt Helgoland, MeeresstationHelgolandFederal Republic of Germany

Personalised recommendations