Advertisement

Marine Biology

, Volume 24, Issue 1, pp 65–67 | Cite as

Clearance rates of food suspension and food passage rates as a function of temperature in two north-sea bryozoans

  • N. R. Menon
Article

Abstract

The filtration rate has been determined for Electra pilosa and Conopeum reticulum, acclimated at 4 constant temperatures (6°, 12°, 18°, 22°C). Cryptomonas sp. was used as the test food-organism. Temperature affects filtration rate in both bryozoans. Clearance rate, measured at hourly intervals during the course of the experiment, was never uniform. Possibly, temporary reductions in ciliary activities were induced by the artificial conditions under which the experiments were carried out. The results obtained compare well with those reported by Bullivant (1968) on Bowerbankia imbricata, a cosmopolitan ctenostome. Rate of food passage through the alimentary canal is affected by temperature. The present study is the first to demonstrate the effect of temperature on the rate of filtration in bryozoans.

Keywords

Filtration Constant Temperature Filtration Rate Clearance Rate Temporary Reduction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Literature Cited

  1. Bullivant, J. S.: The rate of feeding of the bryozoan Zoobotryon verticillatum. N. Z. Jl mar. Freshwat. Res. 2, 111–134 (1968).Google Scholar
  2. Conover, R. J.: Feeding of large particles by Calanus hyperboreus (Kroyer). In: Some contemporary studies in marine science, pp 187–194. Ed. by H. Barnes. London: George Allen & Unwin Ltd. 1966.Google Scholar
  3. Corner, E. D. S.: On the nutrition and metabolism of zooplankton. I. Preliminary observations on the feeding of the marine copepod Calanus helgolandicus (Claus). J. mar. biol. Ass. U.K. 41, 5–16 (1961).Google Scholar
  4. Hunt, O. D.: The food of the bottom fauna of the Plymouth fishing grounds. J. mar. biol. Ass. U.K. 13, 560–598 (1925).Google Scholar
  5. Jebram, D.: A cultivation method for saltwater Bryozoa and an example for experimental biology. 1st I.B.A. International Conference on Bryozoa. S. Donato Milanex. 1968. Atti Soc. ital. Sci. nat. 108, 119–128 (1968).Google Scholar
  6. Jörgensen, C. B.: On the water transport through the gills of bivalves. Acta physiol. scand. 5, 297–304 (1943).Google Scholar
  7. Kinne, O.: The effects of temperature and salinity on marine and brackish water animals. I. Temperature. Oceanogr. mar. Biol. A. Rev. 1, 301–340 (1963).Google Scholar
  8. —: Temperature: animals — invertebrates. In: Marine ecology, Vol. I. Environmental factors, Pt 1. pp 407–514. Ed. by O. Kinne. London: Wiley-Interscience 1970.Google Scholar
  9. — and G. A. Paffenhöfer: Hydranth structure and digestion rate as a function of temperature and salinity in Clava multicornis (Cnideria, Hydrozoa). Helgoländer wiss. Meeresunters. 12, 329–341 (1965).Google Scholar
  10. Menon, N. R.: Heat tolerance, growth and regeneration in three North Sea bryozoans exposed to different constant temperatures. Mar. Biol. 15, 1–11 (1972).Google Scholar
  11. Schneider, D.: Der Aufbau der Bugula-Tierstocke und seine Beeinflussung durch Außenfaktoren. Biol. Zbl. 78, 250–283 (1959).Google Scholar

Copyright information

© Springer-Verlag 1974

Authors and Affiliations

  • N. R. Menon
    • 1
  1. 1.Biologische Anstalt Helgoland (Meeresstation)HelgolandGermany (FRG)

Personalised recommendations