Fischwachstum bei Oligo-, Meso- und Eutrophie des Bodensees |
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| Authors: | Dr Jürgen Von Hartmann |
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| Institution: | 1. Institut für Seenforschung und Fischereiwesen, Untere Seestrasse 81, D-7994, Langenargen, BRD
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| Abstract: | Recent growth of 14 fish taxa of Lake Constance has been studied. In the mesotrophic basin summer-pelagic species opposite to the others appear to grow faster now than during earlier oligotrophic status. From trends of growth, feeding and yield (table) it is concluded that eutrophication has favoured planktivores.—In the eutrophic lower basin only coregonids grow slower than in the mesotrophic part of the lake. Factors that have caused growth differences are thought to be food density and water temperature (through changed fish distribution and different shape of basin). |
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