Keynote speakers

John F. Craig

Craig Consultancy, Dunscore, Scotland

"I first started studying perch in 1969 in a small freshwater lagoon in South Devon, England. I went on to research perch in Windermere in the English Lake District for 10 years in part of a very long investigation of the perch and pike populations. I worked in Canada for 7 years and looked at walleye stocks in prairie lakes especially the effectiveness of stocking. As well as original papers, I have written two books on percids: The Biology of Perch and Related Fish and Percid Fishes Systematics, Ecology and Exploitation. Recently I have published Freshwater Fisheries Ecology."

Robert Arlinghaus

Leibniz-Institute of Freshwater Ecology and Inland Fisheries & Humboldt-Universität zu Berlin, Berlin, Germany

"I am an interdisciplinary fisheries scientist particularly focused on the social, ecological and evolutoinary study of recreational fisheries. I am Editor of the journal Fish and Fisheries, author of more than 250 peer-reviewed papers and close to 500 publications overall, and the recipient of numerous awards, including the Award of Excellence in Fisheries Management and Public Outreach by the American Fisheries Society, Medal by The Fisheries Society of the British Isles, Cultura Award and Comunicator Award by the German Science Foundation. Although I have mainly worked on northern pike and carp, I have published meta-analysis and models dealing with the vulnerability of percids, such as Eurasian perch or zander, to recreational fishing-related stressors. More recently, I have studied the behaviour of perch and the determinants of growth of perch in German gravel pit lakes. In my key note, I will more generally speak about issues of sustainability related to exploitation, stocking and fisheries-induced evolution of freshwater fishes."

Keynote speech title:

On the sustainability of recreational fisheries on freshwater fishes, including percids

Peter Eklӧv

Uppsala University, Uppsala, Sweden

"I am community ecologist interested in understanding the role of intra- and interspecific interactions for fish community structure. I have developed a strong expertise in the study of spatially structured food web interactions, currently with a major focus on global effects on freshwater fish communities. Perch has been the major fish species in my publications for the past 30 years, mainly dealing with individual variation in behaviour, morphology and niche. In my research I combine experimental and field approaches where my earlier studies focused on predator-prey interactions mainly between perch, pike and roach which I have developed over the years using perch as a model species in more complex food webs. In my key note I will speak about the importance of intraspecific variation in behaviour, morphology, metabolism and even fatty acids of perch for interactions across habitat boundaries."

Martti Rask

Lammi Biological Station, University of Helsinki, Finland

"I started my researcher career in Tvärminne Zoological Station, University of Helsinki, in a project on Population Dynamics of Perch Perca fluviatilis in northern Baltic Sea. The work was continued in fresh waters and was directed to environment oriented fish research including surveys and lake scale experiments on the effects of acid precipitation, liming of acidified lakes, effects of catchment forestry, eutrophication of lakes and restoration of eutrophicated lakes. Development of fish-based tools for implementation of the EU water policy was important during the last two decades. Perch has remained my main target species throughout the years and occur in the title of 30 out of ca. 100 publications. In the keynote I will give examples of perch population responses to different changes in lake environments and of the value of perch as a tool in environmental monitoring."

David G. Fielder

Michigan Department of Natural Resources & Michigan State University, United States 

"As a Fisheries Research Biologist, I have spent my career studying the status of coolwater fish communities in large lake environments with emphasis on Percid communities. For the last 27 years my work has been focused on the Laurentian Great Lakes with particular emphasis on Saginaw Bay. My work has been directed at designing and guiding efforts towards recovery targets for Walleye and Yellow Perch populations and fisheries. As recovery targets have been met, research has transitioned to gauging sustainability. In my keynote address, I will speak about the lessons learned over recovery of Saginaw Bay's Walleye population; a multigenerational journey."