|Zoological Institute of the
Ludwig-Maximilians-University, Department Prof. Tautz.
|Contact person (name and e-mail):
|Persons working on brown trout
|Kornelia Rassmann, Michael Miller, Diethard Tautz
|General research topics of the
|Conservation and management, genetic population
|General description of research on
brown trout population genetics:
|Our project is funded in order to assess the impact of
allochthonous introductions on autochthonous brown trout populations in Germany. We are
interested in the the relationships between bavarian potamodromous populations and stream
|List of projects (brown trout) for
the past 3 years:
| Study #1
||Lars Klein, Michael Miller, Kornelia Rassmann, Uli
Schliewen, Diethard Tautz
||Claudia Englbrecht, Arnaud Estoup, Steven Weiss
|Source of project
||Phylogeography, stocking effects, genetic population structure, gene
flow, isolation by distance.
||Study impact of introductions on autochthonous populations in order
to elaborate management recommendations.
||We study the genetics of more than 50 brown trout populations from
the Danube, Rhine and Elbe drainages in southeastern Germany (Bavaria) using
microsatellite markers developed by Arnaud Estoup and collaborateurs, as well as
mitochondrial D - Loop sequences. Our collection-sites will be classified according to the
intensity of allochthonous brown trout input according to available information from
different sources (historical data, presence of clearly allochthonous fishes like brook
charr, angler information, etc....). We try to use Cottus gobio phylogeographic
data (based on mitochondrial D - Loop data) to develop a hypothesis for the undisturbed
phylogeography of brown trout populations, which presumably (!) should be similar to the
one of Cottus gobio . In addition we consider to study genetics of a completely
undisturbed brown trout metapopulation in southern Europe. Further we have developed a
modified "Index of Biotic Integrity" (IBI) for brown trout streams, to classify
the sites according to environmental degradation. This in order to investigate possible
correlations between degradation, degree of disturbance by introductions and the genetic
composition of the resident brown trout populations. Finally we study the distribution and
heterogeneity of black (and perhaps red) dot marks as well as shape and number parr marks
within and among each population and will compare the results with our genetic data.
||MtDNA sequencing (5´ region of mtDNA d-loop), microsatellites.
||Resident and potadromous populations.
|Origin of samples:
||Germany, (Greece or Turkey ?) Atlantic Sea Basin, Black Sea basin.
||Started in October 1996, due September 2000.
Publications (brown trout genetics)
Theses (eg, PhD and MSc theses):
Klein, L (1998) Modifikation und Bewertung eines "Index of Biotic
Integrity" (IBI) zur Evaluation von Mittelgebirgsbächen. Diplomarbeit,