Why do Potamophylax Cingulatus (Steph.) (Trichoptera) Larvae Aggregate at Pupation?

  • C. Otto
  • B. S. Svensson
Part of the Series Entomologica book series (SENT, volume 20)


In stream-living Potamophylax cingulatus, current velocity was found to be an ultimate factor in guiding settlement of the larvae prior to pupation, areas of high current velocity being avoided. In areas suitable for pupation, i.e. in a low current regime, the larvae formed aggregations only under certain stones. Most pupae were found in large (> 40 inds.) aggregations, where also hatching success was highest. Infestation by a chironomid larva, Polypedilum fallax Joh., peaked at intermediate aggregation size. We suggest pupal aggregations to be formed in order to reduce the risk of becoming a victim of the chironomid.


Current Velocity Large Aggregation Hatching Success Infestation Rate Downstream Part 
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.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Campbell, J.I. and Meadows, P.S., J. Zool. Lond. 167: 133–141, 1972.CrossRefGoogle Scholar
  2. Clark, K.L. and Robertson, R.J., Behay. Ecol. Sociobiol. 5: 359–371, 1979.CrossRefGoogle Scholar
  3. Cullen, J.M., In Proc. 7th Int. Om. Congr. Helsinki, pp. 153–157, 1969.Google Scholar
  4. Dratnal, E., Bull. Acad. Pol. Sci. Biol. 27: 183–193, 1979.Google Scholar
  5. Gallepp, G.W., Ecology 55: 1283–1294, 1974.CrossRefGoogle Scholar
  6. Hamilton, W.D., J. Theor. Biol. 31: 295–311, 1971.PubMedCrossRefGoogle Scholar
  7. Malmqvist, B.; Nilsson, L.M. and Svensson, B.S., Oikos 31: 3–16, 1978.CrossRefGoogle Scholar
  8. Otto, C., Oikos 22: 292–301, 1971.CrossRefGoogle Scholar
  9. Otto, C., Oikos 26: 159–169, 1975.CrossRefGoogle Scholar
  10. Otto, C., Oikos 27: 93–100, 1976.CrossRefGoogle Scholar
  11. Parker, C.R. and Voshell, J.R., Environ. Entomol. 8: 808–809, 1979.Google Scholar
  12. Patterson, I.J., Ibis 107: 433–459, 1965.CrossRefGoogle Scholar
  13. Robertson, R.J., Ecology 54: 1085–1093, 1973.CrossRefGoogle Scholar
  14. Scott, D., Arch. Hydrobiol. 54: 340–392, 1958.Google Scholar
  15. Tobias, W., Oikos 18: 55–75, 1967.CrossRefGoogle Scholar
  16. Wilson, E.O. Sociobiology — the New Synthesis. Harvard University Press, Cambridge, Massachusetts, 1975.Google Scholar

Copyright information

© Dr W. Junk Publishers, The Hague 1981

Authors and Affiliations

  • C. Otto
  • B. S. Svensson

There are no affiliations available

Personalised recommendations