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A Possible Explanation of Emergence Patterns of Baetis vernus CURTIS (Ins.: Ephemeroptera) on the Breitenbach -Schlitz Studies on Productivity, Nr. 22-

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons56742

Illies,  Joachim
Limnological River Station Schlitz, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

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Illies, J., & Masteller, E. C. (1977). A Possible Explanation of Emergence Patterns of Baetis vernus CURTIS (Ins.: Ephemeroptera) on the Breitenbach -Schlitz Studies on Productivity, Nr. 22-. Internationale Revue der Gesamten Hydrobiologie, 62(2), 315-321.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-CD2A-A
Abstract
Baetis vernus, a major contributor to the biomass of the Breitenbach, shows a remarkable degree of fluctuation in its emergence, which - in the years under observation (1969-1975) - ranges from univoltine to trimodal patterns. It is postulated, that warm overwintering temperatures produce unimodal emergence whereas cold winter temperatures (esp. periods with less than 5°C) produce biomodal or trimodal emergence. The relations between egg-hatching, larval growth and temperature are discussed.