(Dept. 4) Biology and Ecology of Fishes

In the Department of Biology and Ecology of Fishes, we seek to understand the ecological and evolutionary processes that structure populations and communities of freshwater fishes and affect their functions. We use this knowledge to improve the management and conservation of wild fish populations. Our work focuses on interactions between natural and anthropogenic ecological factors and their effects on the dynamics of fish populations. The methodological approaches include hypothesis-driven laboratory research, mesocosm experimentation, lake manipulation, comparative field studies and theoretical modelling.

Contact persons

Jens Krause

Head of Department
Research group
Mechanisms and Functions of Group-Living

Department members

Selected publications

May 2021
Reviews in Fish Biology and Fisheries. - 31(2021), 181–200

A bright spot analysis of inland recreational fisheries in the face of climate change: learning about adaptation from small successes

Amanda L. Jeanson; A. J. Lynch; J. D. Thiem; W. M. Potts; T. Haapasalo; A. J. Danylchuk; T. D. Beard; R. Arlinghaus; L. M. Hunt; N. Young; S. J. Cooke

The review study highlights examples of “bright spots” to show that a positive future for inland recreational fisheries in the face of climate change is possible. The authors present potential strategies (e.g. community-based or transdisciplinary restoration projects, adaptive approaches to short-term fisheries interventions) to adapt to current and future climate scenarios.

May 2021
Reviews in Fish Biology and Fisheries. - 31(2021), 253–288

Technological innovations in the recreational fishing sector: implications for fisheries management and policy

Steven J. Cooke; Paul Venturelli; William M. Twardek; Robert J. Lennox; Jacob W. Brownscombe; Christian Skov; Kieran Hyder; Cory D. Suski; Ben K. Diggles; Robert Arlinghaus; Andy J. Danylchuk

The authors have summarized how technical innovations can affect anglers, fisheries management and fish populations. They advise to increasingly study the effects of fishing innovations and adjusting management measures as necessary. 

April 2021
Freshwater Biology. - 66(2021)5, 884-901

Genetic population structure of a top predatory fish (northern pike, Esox lucius) covaries with anthropogenic alteration of freshwater ecosystems

Erik Eschbach; Arne Wolfram Nolte; Klaus Kohlmann; Josep Alós; Sandro Schöning; Robert Arlinghaus

The authors investigated how the genetic population structure of northern pike in Germany varies with the type of ecosystem and the integrity of the ecosystem using ecological status assessments of the Water Framework Directive and indices of the wetland quality and trophic state. The study revealed a positive association of the degree of genetic hybridisation with decreasing ecological status. 

February 2021
Journal of Environmental Management. - 286(2021), Art. 112100

How much habitat does a river need?: a spatially-explicit population dynamics model to assess ratios of ontogenetical habitat needs

David Farò; Guido Zolezzi; Christian Wolter

The authors used a spatially explicit population dynamics model for the barbel to investigate the functional dependencies of sub-habitats. They showed that revitalising only spawning or only juvenile habitats is not effective; the functional unit and a minimum size of habitats are essential. The model helps to predict the revitalisation success on the basis of the size.

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