Original paper

A quantitative description of the life cycle and density regulation of Brachycentrus subnubilus in the Austrian Danube

Anderwald, P. H.

Large Rivers Vol. 10 No. 1-4 (1996), p. 417 - 424

20 references

published: Sep 18, 1996

DOI: 10.1127/lr/10/1996/417

BibTeX file

ArtNo. ESP142011300030, Price: 29.00 €

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Abstract

The development of the trichopteran Brachycentrus subnubilus and its relationship to environmental variables were studied quantitatively, 25 km upstream from an impoundment on the Austrian section of the Danube. The life cycle was univoltine. Larval growth was described by a logistic model; the final weight of three consecutive generations increased significantly and compensated for 30% of the population losses in biomass due to a significant decrease in larval density over a 3-year period. Movement of sediment was a key variable in density regulation.

Keywords

Brachycentrus subnubiluslarvalsedimentAustrian Danube