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Diel Emergence Patterns of some Mayflies (Ephemeroptera) of the Roseau River (Manitoba, Canada)

  • M. K. Friesen
  • John F. Flannagan
  • P. M. Laufersweiler

Abstract

Emergence of mayflies was monitored at 2 h intervals throughout one 48 h period in each of June, July and August, 1976. In all three study periods most emergence occurred from mid-day until dark, with peak emergence at dusk. The main exceptions to these general trends were Baetis intercalaris whose peak emergence occurred at mid-day in June, and some females of B. intercalaris and Tricorythodes nr. allectus which emerged at dawn. The time of day of emergence was similar for most species from day to day and month to month. In species where considerable numbers of males and females emerged, peak emergence of both sexes tended to occur during the same 2 h periods.

Keywords

Emergence Time Congeneric Species Peak Emergence Emergence Trap Synchronous Emergence 
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.

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References

  1. Boerger, H. and H.F. Clifford. 1975. Emergence of mayflies (Ephemeroptera) from a northern brown-water stream of Alberta, Canada. Int. Ver. theor. angew. Lirmnol. Verh. 19: 3022–2028.Google Scholar
  2. Flannagan, J.F. 1978. Emergence of caddisflies from the Roseau River, Manitoba, p. 183–197. In: Proceedings 2nd International Symposium on Trichoptera. Junk, the Hague.Google Scholar
  3. Hall, R.J., L. Berner and E.F. Cook. 1975. Observations on the biology of Tricorythodes atratus McDunnough (Ephemeroptera: Ephemeridae). Proc. Entomol. Soc. Wash. 77: 34–49.Google Scholar

Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • M. K. Friesen
    • 1
  • John F. Flannagan
    • 1
  • P. M. Laufersweiler
    • 1
  1. 1.Department of FisheriesOceans Freshwater InstituteWinnipegCanada

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