Torsten Schulze

IGB, Dept.4,
Biology and Ecology of Fishes 
12587 Berlin, Müggelseedamm 310

Fields of Interests:

Changes in structure and function of fish community in a mesotrophic lake after enhancement of piscivorous fish biomass (food web manipulation)

Torsten.Schulze@igb-berlin.de

since December 2006
Dresden University of Technology
Institute of Hydrobiology

1994 to 1998: Studies of biology at the Rheinische Friedrich-Wilhelms-University of Bonn.

1997 to 98: Participation in an ERASMUS exchange program with the University of East Anglia, Norwich, Great Britain, School of Biological Sciences. Attended classes were amongst others 'marine and coastal ecology' and 'fisheries biology'. Third year research project: 'Mortality and Growth of Crangon crangon in laboratory conditions'

1998: Internship at the University of California, Davis, USA; School of Veterinary Medicine; Department Anatomy, Physiology and Cell biology; Aquatic Toxicology. Work on the effects of endocrine disruptors on the reproduction of MEDAKA (Oryzias latipes).

1998: Continuation of studies at the Dresden University of Technology. Main subject: hydrobiology; minor subjects: microbiology, hydro science & engineering.

2000 to 2001: Master thesis: 'The position of eel (Anguilla anguilla) in the food web of Saidenbach Reservoir and its relevance as piscivore for biomanipulation'.

Since 2001: Ph.D. student at the Institute of Freshwater Biology and Inland Fisheries Berlin, Department Biology and Ecology of Fishes. PhD thesis within the project 'changes in structure and function of fish community in a mesotrophic lake after enhancement of piscivorous fish biomass (food web manipulation)'. Main subject: changes in feeding and distribution of the previously dominating piscivores.

Changes in structure and function of a fish community in a mesotrophic lake after enhancement of piscivorous fish biomass (food web manipulation)

(DFG Me 1686/4-1+2)

In Lake Großer Vätersee (Brandenburg) the structure of the fish community will be changed by doubling the biomass of piscivores. We analyse both the behavioural and numerical response of the planktivores, and changes in feeding and distribution of the previously dominating piscivores. The data will be used to evaluate the stability and resilience of food webs under mesotrophic conditions. In the first phase of the project, abundance, feeding behaviour and consumption of the unmanipulated fish stock were investigated. In the second phase, Lake Großer Vätersee was stocked with 2+ zander (Sander lucioperca) in March 2001. My part within the project is the investigation of abundance, habitat choice and diet of the piscivorous fishes (perch, Perca fluviatilis, pike, Esox lucius, and zander) and their feeding impact on the non predatory fish (roach, Rutilus rutilus, and juvenile perch in comparison to the unmanipulated state. Obtained data will be implimented in an individual-based model (Dr. Franz Hölker).

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• III. Tagung der Gesellschaft für Ichthyologie e.V. (GFI) und VI. Symposium für Ökologie, Ethologie und Systematik der Fische, Wien, Österreich, 30.08.-01.09.2001: Abundanz und Verteilung des Aals (Anguilla anguilla) in einer Talsperre und seine Stellung im Nahrungsnetz. Torsten Schulze, Robert Radke, & Jürgen Benndorf. Institut für Hydrobiologie, TU Dresden.
• Workshop Seentherapie, Blossin, Deutschland, 18.03-20.03.2002: Die Bedeutung des Aals (Anguilla anguilla) für die Biomanipulation in einer Talsperre. Torsten Schulze, Robert Radke, Uwe Kahl & Jürgen Benndorf. Institut für Hydrobiologie, TU Dresden.
• PERCIS III, The Third International Percid Fish Symposium, Madison, Wisconsin USA, July 20-24, 2003: Impact of Zander stocking on the food composition of perch and pike in a mesotrophic lake. Torsten Schulze1, Uli Baade, Hendrik Dörner1, Reiner Eckmann2, Susanne Haertel1,2, Franz Hölker1, Thomas Mehner1. 1): Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Germany.
• Jahrestagung der Deutschen Gesellschaft für Limnologie (DGL), Köln, 29. Sep. -3. Okt. 2003: Zander als neue Konkurrenz - ein vorher-nachher-Vergleich des Fraßverhaltens von Barsch und Hecht. Torsten Schulze, Uli Baade, Hendrik Dörner, Reiner Eckmann, Susanne Haertel, Franz Hölker & Thomas Mehner. Leibniz-Institute of Freshwater Ecology and Inland Fisheries & University of Konstanz, Germany.

Poster:

• Jahrestagung der Deutschen Gesellschaft für Limnologie (DGL) in Magdeburg (18.-22.09.2000: "Sag mir, wo die Aale sind" oder: Horizontal- und Vertikalverteilung des Aals in einer Talsperre. Torsten Schulze, Robert Radke, Falk Wieland & Jürgen Benndorf. Institut für Hydrobiologie, TU Dresden.
• PERCIS III, The Third International Percid Fish Symposium, Madison, Wisconsin USA, July 20-24, 2003: Size-dependent predation on juvenile fish by perch and Zander in relation to prey fish availability. Hendrik Dörner, Jürgen Benndorf, Stephan Hülsmann, Uwe Kahl, Thomas Mehner, Heinz Schultz, Torsten Schulzeand Annekatrin Wagner; Leibniz-IGB, Berlin, Germany, & Dresden University of Technology, Institute for Hydrobiology, Germany
  
• Behaviour and Ecology of Freshwater fish: Linking ecology and individual behaviour, Silkeborg, Denmark, 22-26 August 2004: How to make perch "sandwiched"?: Introduce pikeperch to a piscivorous guild consisting of pike and perch. Torsten Schulze, Uli Baade, Hendrik Dörner, Reiner Eckmann, Susanne Haertel, Franz Hölker & Thomas Mehner. Leibniz-Institute of Freshwater Ecology and Inland Fisheries & University of Konstanz, Germany.
• Behaviour and Ecology of Freshwater fish: Linking ecology and individual behaviour, Silkeborg, Denmark, 22-26 August 2004: Predation on juvenile fish by pikeperch and perch in relation to body size and food availability. Hendrik Dörner & Torsten Schulze. Leibniz-Institute of Freshwater Ecology and Inland Fisheries.

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Referred publications:

• Schulze, T., Baade, U., Dörner, H., Eckmann, R., Haertel-Bohrer, S.S., Mehner, T. (2006) Response of the residential fish community to introduction of a new predator type in a mesotrophic lake. Canadian Journal of Fisheries and Aquatic Sciences 63, 2202-2212.[pdf]
• Schulze, T., Dörner, H., Hölker, F., Mehner, T. (2006) Determinants of habitat choice in a large planktivorous fish. Journal of Fish Biology 69, 1136-1150. [pdf]
• Dörner, H., Schulze, T., Mehner, T., Hölker, F. (2006) Increasing water temperature induced no increase in mortality in small perch marked with coded wire tags (CWT). Journal of Fish Biology 69, 1255-1260.
• Mehner, T., Arlinghaus, R., Berg, S., Dörner, H., Jacobsen, L., Kasprzak, P., Koschel, R., Schulze, T., Skov, C., Wolter, C. & Wysujack, K. (2004): How to link biomanipulation and sustainable fisheries management: a step-by-step guideline for lakes of the European temperate zone. Fisheries Management and Ecology 11, 261-275.
• Dörner, H., Benndorf, J., Hülsmann, S., Kahl, U., Mehner, T., Schultz, H., Schulze, T. & Wagner, A. (2004). Size-dependent predation on juvenile fish by perch and zander in relation to prey fish availability. In Proceedings of Percis III: The Third International Percid Fish Symposium, July 20-24, 2003 (Barry, T.P., and J.A. Malison, Eds.). University of Wisconsin Sea Grant Institute, Madison, WI, USA.
• Schulze, T., Baade, U., Dörner, H., Eckmann, R., Haertel, S.S., Hölker, F. & Mehner, T. (2004). Impact of zander stocking on the food composition of perch and pike in a mesotrophic lake. In Proceedings of Percis III: The Third International Percid Fish Symposium July 20-24, 2003 (Barry, T.P., and J.A. Malison, Eds.). University of Wisconsin Sea Grant Institute, Madison, WI, USA. [pdf]
• Schulze, T., Kahl, U., Radke, R. & Benndorf, J. (2004). Consumption, abundance and habitat use of Anguilla anguilla in a mesotrophic reservoir. Journal of Fish Biology 65, 1543-1562. [pdf]

Referred publications, submitted or in preparation:

• Dörner, H., Schulze, T., Mehner, T., Hölker, F. (in rev.) Increasing water temperature induced no increase in mortality in small perch marked with coded wire tags (CWT).
• Schulze, T., Dörner, H., Hölker, F., Mehner, T. (subm.) Determinants of habitat choice in a large planktivorous fish.
• Schulze, T., Baade, U., Hölker, F., Dörner, H., Mehner, T. (subm.) Inter- and intraspecific trophic niche structure in a piscivorous fish guild before and after experimental introduction of a competing top predator.
• Schulze, T., Baade, U., Dörner, H., Eckmann, R., Haertel-Bohrer, S.S., Mehner, T. (subm.) Response of the residential fish community to introduction of a new predator type in a mesotrophic lake.
• Hölker, F., Dörner, H., Schulze, T., Haertel-Bohrer, S.S., Mehner, T. (in prep.) Species-specific antipredator responses in a planktivorous fish community.
• Dörner, H., Skov, C., Berg, S., Schulze, T. (in prep.) The diet of large eels in relation to food availability.

Non-referred publications:

• Torsten Schulze, Robert Radke & Jürgen Benndorf (2001). Abundanz und Verteilung des Aals (Anguilla anguilla) in einer Talsperre und seine Stellung im Nahrungsnetz. Abstractband der III. Tagung der Gesellschaft für Ichthyologie e.V. (GFI) und VI. Symposium für Ökologie, Ethologie und Systematik der Fische, Wien (2001), Österreich. Verlag Natur & Wissenschaft Harro Hieronimus & Dr. Jürgen Schmidt, Solingen, p. 43.
• Torsten Schulze, Robert Radke, Falk Wieland & Jürgen Benndorf (2001). "Sag mir, wo die Aale sind" oder: Horizontal- und Vertikalverteilung des Aals in einer Talsperre. Deutsche Gesellschaft für Limnologie (DGL) - Tagungsbericht Magdeburg (2000), Tutzing 2001, pp. 86-90.
• Torsten Schulze, Uli Baade, Hendrik Dörner, Reiner Eckmann, Susanne S. Haertel, Christian Helms, Franz Hölker & Thomas Mehner (2004). Die Auswirkung eines Zanderbesatzes auf Barsch und Hecht in einem mesotrophen See. Deutsche Gesellschaft für Limnologie (DGL) - Tagungsbericht Köln (2003), Berlin 2004, Band I, pp. 352-356. [pdf]
• Radke, R.J. & Schulze, T. (2004). Spitz- oder Breitkopf - ist das hier die Frage? Fischer und Teichwirt 6, pp. 705-706.

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