ReinerEckmannLimnological Institute, University of Konstanz

ReinerEckmannassociatedPartyRoland Roesch, Fischereiforschungsstelle des Landes Baden-Wuerttemberg, LangenargenCo-owner2013-01-09Data were collected at three sites in Upper Lake Constance, three replicate samples during both day and night per site. Sampling was monthly from March to November during the first five years, but takes place in May, June, August and September since 2003. Fish are determined to species, grouped in size classes, and 20 specimens per size class (whenever they are available) are measured for total length and mass. The purpose of the sampling is the monitoring of possible changes in the littoral fish community in the light of decreasing lake productivity, invasive aquatic species, climate change and fisheries management. Obtain permission from data set owner(s)Upper Lake Constance9.449.4447.6147.61199725 speciesClassOsteichthyesReinerEckmannLimnological Institute, University of Konstanz

reiner.eckmann@uni-konstanz.de

A beach seine, 15 m long, 1 m high, 4 mm bar mesh size, is extended parallel to the shoreline at around one meter depth and hauled towards the shore by two persons. Three replicate hauls are made in close proximity to each other late in the morning and early in the night (starting at sunset). Fish are killed with an overdose on anesthetic and stored on ice. In the lab they are sorted by species and size classes and counted. 20 specimens, whenever they are available, are measured for total length and mass.

attached_fileNot authorized to access resourceOther timeseries The feasibility of beach seine sampling depends on weather conditions and lake level. Therefore, some dates are missing in several years, but May, June, August and September samples are available for most years. monthly Geographic distribution data available from Kottelat and Freyhof: Handbook of European Freshwater Fishes General informations on ecological traits available from Fishbase Data from German Meteorological Service available